ORCID Profile
0000-0001-7857-8759
Current Organisations
University of Melbourne
,
University of Sydney
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Physical Chemistry (Incl. Structural) | Inorganic Chemistry | Chemistry Of Catalysis | Inorganic Green Chemistry | Chemical Characterisation of Materials | Electrochemistry | Industrial Chemistry | Bioinorganic Chemistry | Biochemistry And Cell Biology Not Elsewhere Classified | Nanotechnology | Catalysis and Mechanisms of Reactions | Optical Physics | Colloid And Surface Chemistry | Macromolecular and Materials Chemistry | Synthesis of Materials | Transition Metal Chemistry | Transition Metal Chemistry | Biomaterials | Zoology | Composite Materials | Optical Physics Not Elsewhere Classified | Instruments And Techniques | Other Physical Sciences | Functional Materials | Macromolecular and Materials Chemistry not elsewhere classified | Polymers and Plastics | Materials Engineering | Environmental Chemistry (Incl. Atmospheric Chemistry) | Animal Anatomy And Histology | Conservation And Biodiversity |
ANZSRC Socio-Economic Objective (SEO)
Chemical sciences | Biological sciences | Physical sciences | Energy Storage (excl. Hydrogen) | Organic industrial chemicals not classified elsewhere | Synthetic resins and rubber | Other | Biofuel (Biomass) Energy | Industrial chemicals and related products | Human pharmaceutical products | Solar-Photovoltaic Energy | Plastics in Primary Forms | Plastic Products (incl. Construction Materials) | Expanding Knowledge in the Chemical Sciences | Industrial Chemicals and Related Products not elsewhere classified | Dental health | Diagnostics | Treatments (e.g. chemicals, antibiotics)
Related Links
Publications
Cover Feature: The Autocatalytic Isomerization of Allylbenzene by Nickel(0) Tetrakis(triethylphosphite) (Eur. J. Inorg. Chem. 29/2018)
Publisher: Wiley
Date: 10-07-2018
Interconversions of nickel carbonyl cluster anions
Publisher: Elsevier BV
Date: 11-1993
The one-pot synthesis, characterisation and catalytic behaviour of mesoporous silica-sulfated zirconia solids
Publisher: Elsevier BV
Date: 12-2011
The encapsulation of metal nanoparticles within porous liquids
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CC03546J
Abstract: Herein, we report for the first time a synthetic method for the encapsulation of metal nanoparticles within porous liquids.
Biocrude yield and productivity from the hydrothermal liquefaction of marine and freshwater green macroalgae
Publisher: Elsevier BV
Date: 03-2014
DOI: 10.1016/J.BIORTECH.2013.12.083
Abstract: Six species of marine and freshwater green macroalgae were cultivated in outdoor tanks and subsequently converted to biocrude through hydrothermal liquefaction (HTL) in a batch reactor. The influence of the biochemical composition of biomass on biocrude yield and composition was assessed. The freshwater macroalgae Oedogonium afforded the highest biocrude yield of all six species at 26.2%, dry weight (dw). Derbesia (19.7%dw) produced the highest biocrude yield for the marine species followed by Ulva (18.7%dw). In contrast to significantly different yields across species, the biocrudes elemental profiles were remarkably similar with higher heating values of 33-34MJkg(-1). Biocrude productivity was highest for marine Derbesia (2.4gm(-2)d(-1)) and Ulva (2.1gm(-2)d(-1)), and for freshwater Oedogonium (1.3gm(-2)d(-1)). These species were therefore identified as suitable feedstocks for scale-up and further HTL studies based on biocrude productivity, as a function of biomass productivity and the yield of biomass conversion to biocrude.
Kinetic and rapid scan spectrophotometric studies of the oligomerization of ethene and propene using the catalytic system [Ni(sacsac)P(n-butyl)3 CCl]/AlEt2 CCl
Publisher: Elsevier BV
Date: 02-1995
Cobalt(II) Carboxylate Chemistry and Molecular Magnetism
Publisher: Elsevier
Date: 2013
The preparation of mixed ligand ruthenocenes containing bulky cyclopentadienyl ligands. Crystal structures of pentaphenylruthenocene, [Ru(η5-C5Ph5)(η5-C5H5)], pentaparatolylruthenocene, [Ru{η5-C5(p-Me
Publisher: Elsevier BV
Date: 08-1998
The oligomerisation of ethene with catalysts exhibiting enzyme-like activities
Publisher: Elsevier BV
Date: 05-1989
General discussion
Publisher: Royal Society of Chemistry (RSC)
Date: 1989
DOI: 10.1039/DC9898700161
X-ray Crystal Structure of (η5-Pentaphenylcyclopentadienyl){1- (η5/6-phenyl)-2,3,4,5-tetraphenylcyclopentadienyl}iron(II), [Fe(η5-C5Ph5){(η5
Publisher: American Chemical Society (ACS)
Date: 06-08-2002
DOI: 10.1021/IC025592W
Abstract: Very dark blue prismatic crystals of [Fe(eta(5)-C(5)Ph(5))[(eta(5/6)-C(6)H(5))(C(5)Ph(4))]], the linkage isomer of decaphenylferrocene, were grown from (3:1 v/v) hexane/ethyl acetate and characterized by single-crystal X-ray diffraction (space group P2(1)/n, R1(F) 0.0404). The iron atom is coordinated to two C(5)Ph(5) ligands: one with an eta(5)-C(5)-configuration and the other with a coordinated arene configuration. The phenyl groups of the (eta(5)-C(5)Ph(5)) ligand are oriented in a "paddle-wheel" arrangement about the C(5) ring, with which four of them make an average angle of approximately 53 degrees, the other, an angle of approximately 42 degrees. The coordinated C(6)H(5) ring of the other ligand is inclined at only approximately 5 degrees to the uncoordinated C(5) ring, with which three of the other four phenyl rings make an average angle of approximately 64 degrees, and the other (opposite the coordinated arene ring), an angle of 38 degrees.
The crystal and molecular structure of (η5-pentaphenylcyclopentadienyl) (η5-cyclopentadienyl)iron(II), 1,2,3,4,5-pentaphenylferrocene, [Fe(C5 Ph5 )(C5 H5 )]
Publisher: Elsevier BV
Date: 08-1993
Zinc bromide in aqueous solutions of ionic liquid bromide salts: The interplay between complexation and electrochemistry
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA15736F
Abstract: Voltammetric studies of ZnBr 2 (50 mM) in aqueous equimolar solutions of ionic liquid bromide salts (1-alkyl-1-methylpyrrolidinium bromide, [C n MPyrr], and tetraalkylammonium bromide, [N n,n,n,n ]Br, 50 mM, where n = 2, 4 or 6) are reported.
Electrochemical behaviour of bis[pentane-2, 4-dithionato(1-)]iron(ii), Fe(sacsac)2 , and Dicarbonylbis[pentane-2, 4-dithionato(1-)]iron(ii), Fe(sacsac)2 (CO)2
Publisher: CSIRO Publishing
Date: 1989
DOI: 10.1071/CH9891839
Abstract: The redox behaviours of Fe(sacsac)2 and Fe( sacsac )2(CO)2 in chloroform are reported ( sacsac - = C5H7S2- = dithioacetylacetonate anion = pentane-2,4-dithionate anion). Fe( sacsac )2 is reversibly reduced to [Fe( sacsac )2]-, but no other redox processes are observed within the solvent limits. Fe( sacsac )2(CO)2 undergoes a reversible one-electron reduction followed by rapid loss of carbon monoxide to generate [Fe( sacsac )2]-. The oxidation of Fe( sacsac )2(CO)2 results in the oxidation of a dithioacetylacetonate ligand to the 3,5-dimethyl-1,2-dithiolium cation and the formation of a previously uncharacterized complex believed to be [Fe( sacsac )(CO)2]+. The putative [Fe( sacsac )(CO)2]+ product of the oxidation also undergoes a reversible one-electron oxidation at a potential more positive than that of [Fe( sacsac )2]0/-1.
A New Approach to Understand the Adsorption of Thiophene on Different Surfaces: An Atom Probe Investigation of Self-Assembled Monolayers
Publisher: American Chemical Society (ACS)
Date: 05-09-2017
DOI: 10.1021/ACS.LANGMUIR.7B01820
Abstract: Atom probe tomography was used to analyze self-assembled monolayers of thiophene on different surfaces, including tungsten, platinum, and aluminum, where the tungsten was examined in both pristine and oxidized forms. A glovebag with controlled atmospheres was used to alter the level of oxidation for tungsten. It was shown that different substrates lead to substantial changes in the way thiophene adsorbs on the surface. Furthermore, the oxidation of the surface strongly influenced the adsorption behavior of the thiophene molecules, leading to clear differences in the amounts and compositions of field evaporated ions and molecular ions.
Factors influencing the formation of polybromide monoanions in solutions of ionic liquid bromide salts
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP06913K
Abstract: The formation of polybromide addition products from six different bromide salts was analyzed via spectroscopic and computational means. The examination of tribromide and pentabromide anion formation yielded important insights into the targeted synthesis of highly efficient bromine sequestration agents.
The Oxidation of Adamantane in Trifluoroacetic Acid
Publisher: Elsevier
Date: 1994
Facile, high-yielding preparation of pyrrolidinium, piperidinium, morpholinium and 2,3-dihydro-1H-isoindolinium salts and ionic liquids from secondary amines
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA03226H
Abstract: High yield and purity heterocyclic salts and ionic liquids can be obtained via the microwave irradiation of equimolar amounts of a secondary amine and an α,ω-dibromoalkane in water in the presence of K 2 CO 3 followed by anion exchange.
A flexible, bolaamphiphilic template for mesoporous silicas
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CP51546J
Abstract: A novel symmetrical bola hiphile, containing two N-methylimidazolium head-groups bridged by a 32-methylene linker, was synthesized and characterized. A variety of mesoporous silicas was prepared using the bola hiphile as a "soft template". The effects of absolute surfactant concentration and synthesis conditions upon the morphologies of these silicas were investigated. For a given surfactant concentration, particle morphology pore size and pore ordering were modified through control of the template to silica-precursor ratio and synthesis conditions. Observed morphologies included: lenticular core-shell nanoparticles and decorticated globules, truncated hexagonal plates, and sheets. In all cases the mesopores are aligned along the shortest axis of the nanomaterial. Decorticated materials displayed surface areas of up to 1200 m(2) g(-1) and pore diameters (D(BJH)) of 24-28 Å. Small-angle X-ray diffraction and transmission electron microscopy measurements revealed that the majority of the materials has elliptical pores arranged in rectangular lattices (c2mm). Adoption of this symmetry group is a result of the template aggregate deformation from a regular hexagonal phase of cylindrical rods to a ribbon phase under the synthetic conditions.
Alkane activation by homogeneous palladium complexes
Publisher: Wiley
Date: 11-1991
Beyond the Halogen Bond: Examining the Limits of Extended Polybromide Networks through Quantum-Chemical Investigations
Publisher: Wiley
Date: 04-02-2016
Abstract: The bonding environments of some polybromide monoanions and networks were examined by quantum-chemical methods to investigate electronic interactions between dibromine-dibromine contacts. Examination of thermodynamic parameters and a bond critical point analysis give strong evidence for such bonding modes, which have been previously treated disparately in the literature. The thermodynamic stability of large polybromides up to [Br37 ](-) was also predicted by these methods.
The use of acidic task-specific ionic liquids in the formation of high surface area mesoporous silica
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B907077J
The Kinetic Features of the Palladium-Catalyzed Hydrogenolysis of Nitriles and Amines
Publisher: Wiley
Date: 30-03-2012
Organosilica Nanotube Templates: One‐Pot Synthesis of Carbon‐Modified Polymeric Carbon Nitride Nanorods for Photocatalysis
Publisher: Wiley
Date: 20-12-2017
An EXAFS study of methyl-substituted benzene chromium tricarbonyl complexes
Publisher: Elsevier BV
Date: 04-1997
Investigating homogeneous Co/Br - /H 2 O 2 catalysed oxidation of lignin model compounds in acetic acid
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8CY01902A
Abstract: The catalytic oxidation of lignin model compounds by Co/Br − /H 2 O 2 is investigated substituting Br − for N -hydroxyphthalimide improved substrate conversion and product yield.
Selective Catalytic Methylation of Phloroglucinol with Dimethyl Carbonate in the Presence of Heterogeneous Acids
Publisher: Wiley
Date: 26-11-2018
From macroalgae to liquid fuel: Via waste-water remediation, hydrothermal upgrading, carbon dioxide hydrogenation and hydrotreating
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6EE00414H
Penta-arylcyclopentadienyl complexes
Publisher: Elsevier BV
Date: 08-2011
Nanoencapsulation for Process Intensification
Publisher: Wiley
Date: 15-04-2012
Metallasilsesquioxanes: molecular analogues of heterogeneous catalysts
Publisher: Springer Netherlands
Date: 04-11-2011
Dielectric, electro-optic and spectroscopic properties of (η6-arene)M(CO)3 complexes (M = Cr, Mo or W): a study of metal-arene interactions
Publisher: Elsevier BV
Date: 09-1990
The Catalytic Nature of Chevrel Phases (MxMo6S8) in Review
Publisher: Elsevier BV
Date: 07-2021
Preparation and characterization of iron complexes of the penta-p-tolylcyclopentadienyl and o-tolyltetraphenylcyclopentadienyl ligands
Publisher: American Chemical Society (ACS)
Date: 1993
DOI: 10.1021/IC00054A016
Structural Investigation of Cobalt Oxide Clusters Derived from Molecular Cobalt Cubane, Trimer, and Dimer Oligomers in a Phosphate Electrolyte
Publisher: American Chemical Society (ACS)
Date: 11-05-2017
Steric, hydrogen-bonding and structural heterogeneity effects on the nucleophilic substitution of N-(p-fluorophenyldiphenylmethyl)-4-picolinium chloride in ionic liquids
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3OB40105G
Abstract: The nucleophilic substitution of N-(p-fluorophenyldiphenylmethyl)-4-picolinium chloride was investigated using water and a range of alcoholic nucleophiles in ionic liquid solvents. The reactivity patterns across the nucleophiles examined could be attributed to steric factors, which mediated the relative nucleophilicities. Reducing the hydrogen-bond acidity of the ionic liquid cation was found to generally increase the rate of reaction, however, the magnitude of this rate effect could be influenced by the steric bulk of the nucleophile and the structural heterogeneity of the ionic liquid. Preferential solvation phenomena in binary mixtures of ionic liquids were examined and suggest that the mechanism behind the hydrogen-bond solvation phenomenon arises from direct cation-mediated, rather than indirect anion-mediated, effects.
CHR-insertion (R=H, CH3) into cyclohexyl-substituted silsesquioxanes: Reactivity and decomposition studies
Publisher: Wiley
Date: 09-2014
Abstract: Amorphous silica plays an important role in heterogeneous catalysis as a support and is frequently presumed to be "inert". The structure of the supported catalyst is key to understanding the stability and reactivity of catalytic systems. To provide vital insights into the surface reactivity of silica, Polyhedral oligomeric silsesquioxanes (POSSs) can act as realistic homogeneous molecular models for silica surfaces. Here, we report novel reactivities associated with the silica surface, derived from our insights obtained by means of such model systems with potentially significant implications in catalysis when employing silica-supported catalysts. In this work, the gas-phase reactivities of two cyclohexyl-substituted POSSs, namely the completely condensed triganol prism [Si6cy6O9] (a6b0), and the incompletely-condensed partial cube [Si7cy7O9(OH)3] (a7b3), with cy = c-C6H11, were studied by using atmospheric pressure chemical ionisation (APCI) and collision-induced decomposition (CID) spectroscopies. Silsesquioxane a6b0, containing three-membered rings, was found to be much more reactive, undergoing novel CH2-insertion on reaction with gas phase molecules-a reaction not observed for a7b3, containing only four-membered rings. Both silsesquioxanes displayed the ability to trap ammonia formed in situ within the mass spectrometer from N2 in the instrument. This work also demonstrates the applicability of APCI and the role of CID in elucidating reactive POSS structures, highlighting novel gas-phase reactivities of POSS.
Process systems for the carbonate interchange reactions of DMC and alcohols: Efficient synthesis of catechol carbonate
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CY00119G
Abstract: Reactive methanol removal either by adsorption or by azeotropic distillation promotes complete conversion of different alcohols to the corresponding carbonates.
Single-step methylation of chitosan using dimethyl carbonate as a green methylating agent
Publisher: MDPI AG
Date: 04-11-2019
DOI: 10.3390/MOLECULES24213986
Abstract: N,N,N-Trimethyl chitosan (TMC) is one chitosan derivative that, because of its improved solubility, has been studied for industrial and pharmaceutic applications. Conventional methods for the synthesis of TMC involve the use of highly toxic and harmful reagents, such as methyl iodide and dimethyl sulfate (DMS). Although the methylation of dimethylated chitosan to TMC by dimethyl carbonate (DMC, a green and benign methylating agent) was reported recently, it involved a formaldehyde-based procedure. In this paper we report the single-step synthesis of TMC from chitosan using DMC in an ionic liquid. The TMC synthesised was characterised by 1H NMR spectroscopy and a functionally meaningful degree of quaternisation of 9% was demonstrated after a 12-h reaction time.
The interplay of catechol ligands with nanoparticulate iron oxides
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2DT11864E
Abstract: The unique properties exhibited by nanoscale materials, coupled with the multitude of chemical surface derivatisation possibilities, enable the rational design of multifunctional nanoscopic devices. Such functional devices offer exciting new opportunities in medical research and much effort is currently invested in the area of "nanomedicine", including: multimodal imaging diagnostic tools, platforms for drug delivery and vectorisation, polyvalent, multicomponent vaccines, and composite devices for "theranostics". Here we will review the surface derivatisation of nanoparticulate oxides of iron and iron@iron-oxide core-shells. They are attractive candidates for MRI-active therapeutic platforms, being potentially less toxic than lanthanide-based materials, and amenable to functionalisation with ligands. However successful grafting of groups onto the surface of iron-based nanoparticles, thus adding functionality whilst preserving their inherent properties, is one of the most difficult challenges for creating truly useful nanodevices from them. Functionalised catechol-derived ligands have enjoyed success as agents for the masking of superparamagnetic iron-oxide particles, often so as to render them biocompatible with medium to long-term colloidal stability in the complex chemical environments of biological milieux. In this perspective, the opportunities and limitations of functionalising the surfaces of iron-oxide nanoparticles, using coatings containing a catechol-derived anchor, are analysed and discussed, including recent advances using dopamine-terminated stabilising ligands. If light-driven ligand to metal charge transfer (LMCT) processes, and pH-dependent ligand desorption, leading to nanoparticle degradation under physiologically relevant conditions can be suppressed, colloidal stability of s les can be maintained and toxicity ascribed to degradation products avoided. Modulation of the redox behaviour of iron catecholate systems through the introduction of an electron-withdrawing substituent to the aromatic π-system of the catechol is a promising approach towards achieving these goals.
The Biorefinery—Challenges, Opportunities, and an Australian Perspective
Publisher: SAGE Publications
Date: 04-2008
Abstract: Biomass provides the only sustainable source of organic carbon for the production of chemicals used in manufacturing and as liquid transportation fuels. In this article, the authors examine some of the challenges that society faces in the transition from a global economy in which transportation fuels are derived from fossil fuels to one in which they are derived from renewable biomass via a “biorefinery.” In so doing, the authors present an overview of the technology currently available to society and highlight some of the key issues that must be resolved in order to grasp the opportunities that stem from the transition. They conclude by considering the situation of their own country, Australia, to illustrate that the solutions to the challenges will likely depend not only on technology development but also on social, political, and geographical factors.
Models of surface-confined metallocene derivatives
Publisher: Elsevier BV
Date: 1994
The isolation and crystal structure of the powerful Lewis acid, planar tetrakispyridine cobalt(II), [Co(C5 H5 N)4 ]2+, as its mixed chloride hexafluorophosphate salt
Publisher: Elsevier BV
Date: 02-1996
Nickel carbonyl cluster complexes
Publisher: Elsevier BV
Date: 04-1995
Interactions of Plasmonic Silver Nanoparticles with High Energy Sites on Multi-Faceted Rutile TiO2 Photoanodes
Publisher: Wiley
Date: 10-01-2020
The crystal and molecular structure of bromo (η5-pentaphenylcyclopentadienyl)dicarbonyliron(II), Fe(C5Ph5)(CO)2Br
Publisher: Elsevier BV
Date: 1989
Reactions of p-coumaryl alcohol model compounds with dimethyl carbonate. Towards the upgrading of lignin building blocks
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3GC40334C
Influence of Oxygen and Sulfur Donor Atoms on the Electrochemistry of Transition Metal Tris Chelates
Publisher: American Chemical Society (ACS)
Date: 06-1975
DOI: 10.1021/IC50148A054
Renewable Aromatics from Kraft Lignin with Molybdenum-Based Catalysts
Publisher: Wiley
Date: 26-06-2017
Designing nanoscopic, fluxional bimetallic Pt-Ru alloy hydrogenation catalysts for improved sulfur tolerance
Publisher: Elsevier BV
Date: 12-2011
Delaminated MoS2 as a structural and functional modifier for MgH2 - Better hydrogen desorption kinetics through induced worm-like morphologies
Publisher: Elsevier BV
Date: 02-2016
Toward an Understanding of the Forces Behind Extractive Desulfurization of Fuels with Ionic Liquids
Publisher: American Chemical Society (ACS)
Date: 16-01-2019
Dynamic Nuclear Polarization NMR Spectroscopy of Polymeric Carbon Nitride Photocatalysts: Insights into Structural Defects and Reactivity
Publisher: Wiley
Date: 08-05-2018
Donor-atom effects in the mass spectra of complexes of dipivaloylmethane and its monothio and dithio analogues
Publisher: CSIRO Publishing
Date: 1976
DOI: 10.1071/CH9760257
Abstract: The progressive replacement by sulphur in the isostructural planar nickel compounds bis(2,2,6,6- tetramethylheptane-3,5-dionato)nickel(11) (1), bis(2,2,6,6-tetramethyl-5-thioxoheptan-3-onato)nickel(11) (2) and bis(2,2,6,6-tetramethylheptane-3,5-dithionato)nickel(11) (3) causes a change in their positive electron impact mass spectra from one dominated by metal-containing fragment ions (1) to one But 1 dominated by oxidized ligands (3). Comparisons are also made with the spectra of tris(monothio-dipivaloylmethanato)cobalt(111) and bis(1,l,1-trifluoro-4-thioxopentan-2-onato)nickel (11). Mass spectral peaks corresponding to mixed ligand species were observed when mixtures of (1) and (2) were vaporized in the mass spectrometer.
Understanding the link between solid/liquid interfaces and photoelectrochemical activity in novel thin-film photoanodes of preferentially oriented high-index rutile TiO2 facets – A work inspired by Mi
Publisher: Elsevier BV
Date: 12-2020
Detailed Gas Chromatography/Mass Spectrometric Structural Determination of Olefin Oligomerization Products
Publisher: American Chemical Society (ACS)
Date: 09-1987
DOI: 10.1021/IE00069A017
Interconversion of Polyoxometallates
Publisher: American Chemical Society (ACS)
Date: 12-1980
DOI: 10.1021/IC50214A062
Structural features of ionic liquids: consequences for material preparation and organic reactivity
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3GC41313F
Transition metal single site catalysts- from homogeneous to immobilized systems
Publisher: Wiley
Date: 08-07-2009
Kinetic and mechanistic studies of nickel-catalysed olefin oligomerization
Publisher: Elsevier BV
Date: 03-1989
The Routledge Handbook of Tourism in Asia
Publisher: Routledge
Date: 13-09-2016
Extractive Denitrogenation of Fuel Oils with Ionic Liquids: A Systematic Study
Publisher: American Chemical Society (ACS)
Date: 09-12-2016
Thio Derivatives of 1,3-Diketones and Their Metal Complexes. Dithiomalonamide and its Nickel(II), Palladium(II), and Platinum(II) Derivatives
Publisher: American Chemical Society (ACS)
Date: 04-1975
DOI: 10.1021/IC50146A035
Bis(2,2′,2″-nitrilotriethanol)cobalt(II) bis(acetate)
Publisher: International Union of Crystallography (IUCr)
Date: 06-09-2006
The synthesis and X-ray structural characterisation of the decaphenylmolybdenocenium cation as its tetrafluoroborate salt
Publisher: Elsevier BV
Date: 07-2002
Supramolecular self-assembly of a toroidal inclusion complex, [NH4 ][Co8 (MeCO2 )8 (OMe) 16 ][PF6 ]
Publisher: Royal Society of Chemistry (RSC)
Date: 1998
DOI: 10.1039/A707228G
Molybdenum-95 nuclear magnetic resonance. Applications to substituted carbonyls
Publisher: Elsevier BV
Date: 08-1980
A brief history of organometallic chemistry in Australia and New Zealand
Publisher: Wiley
Date: 09-1990
Ligand donor atom and substituent effects in olefin oligomerization and isomerization catalysed by nickel-based catalyst systems
Publisher: Elsevier BV
Date: 1992
Dynamic Nuclear Polarization NMR Spectroscopy of Polymeric Carbon Nitride Photocatalysts: Insights into Structural Defects and Reactivity
Publisher: Wiley
Date: 08-05-2018
Abstract: Metal-free polymeric carbon nitrides (PCNs) are promising photocatalysts for solar hydrogen production, but their structure-photoactivity relationship remains elusive. Two PCNs were characterized by dynamic-nuclear-polarization-enhanced solid-state NMR spectroscopy, which circumvented the need for specific labeling with either
Coupled Redox Reactions, Linkage Isomerization, Hydride Formation, and Acid−Base Relationships in the Decaphenylferrocene System
Publisher: American Chemical Society (ACS)
Date: 06-1997
DOI: 10.1021/OM960749B
Step by step extraction of bio-actives from the brown seaweeds, Carpophyllum flexuosum, Carpophyllum plumosum, Ecklonia radiata and Undaria pinnatifida
Publisher: Elsevier BV
Date: 12-2020
Chevrel Phase Nanoparticles as Electrocatalysts for Hydrogen Evolution
Publisher: American Chemical Society (ACS)
Date: 09-02-2021
Schiff base complexes of rhenium(IV) and rhenium(V)
Publisher: Royal Society of Chemistry (RSC)
Date: 1979
DOI: 10.1039/DT9790000542
The influence of novel bromine sequestration agents on zinc/bromine flow battery performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA23446A
Abstract: This study benchmarks cycle performance of electrolyte solutions containing novel bromine sequestration agents (BSA) in a zinc bromine flow battery.
(η5-Pentaphenylcyclopentadienyl){1-(η6-phenyl)-2,3,4,5-tetraphenylcyclopentadienyl} iron(II ), [Fe(η5-C5Ph5){(η6-C6
Publisher:
Royal Society of Chemistry (RSC)
Date:
1990
DOI:
10.1039/C39900000408
Synthesis of a CrCoAPO-5(AFI) molecular sieve and its activity in cyclohexane oxidation in the liquid phase
Publisher: Springer Science and Business Media LLC
Date: 2001
International and transnational aspects of the global cruise industry
Publisher: Routledge
Date: 10-03-2008
Interfacial Reactions between Lithium and Grain Boundaries from Anatase TiO2 -TUD-1 Electrodes in Lithium-Ion Batteries with Enhanced Capacity Retention
Publisher: American Chemical Society (ACS)
Date: 26-03-2020
A Spectroscopic Study of an Anhydrous Tetraethyl Orthosilicate-Boric Acid-Ethanol System
Publisher: Springer Science and Business Media LLC
Date: 1998
Hydrogenated Defects in Graphitic Carbon Nitride Nanosheets for Improved Photocatalytic Hydrogen Evolution
Publisher: American Chemical Society (ACS)
Date: 23-06-2015
Shining Light on Carbon Nitrides: Leveraging Temperature to Understand Optical Gap Variations
Publisher: American Chemical Society (ACS)
Date: 04-06-2018
Preparation and characterization of iron complexes of the penta-p-tolylcyclopentadienyl and o-tolyltetraphenylcyclopentadienyl ligands. [Erratum to document cited in CA118(13):124740r]
Publisher: American Chemical Society (ACS)
Date: 07-1993
DOI: 10.1021/IC00067A035
The selective oligomerization of butenes by nickel-based catalysts
Publisher: Elsevier BV
Date: 1988
Crystal and molecular structures of pentaphenylcyclopentadiene and of an isomer, 4,8-diphenyltribenzo[b,f,i]tricyclo[6.2.1.01,5]undecane, the product of a novel metal-assisted photoreaction
Publisher: American Chemical Society (ACS)
Date: 06-1992
DOI: 10.1021/IC00038A014
Cluster alkyls of rhenium
Publisher: Royal Society of Chemistry (RSC)
Date: 1976
DOI: 10.1039/C39760000858
[Fe(C5Ar5)(CO)2Br] complexes as hydrogenase mimics for the catalytic hydrogen evolution reaction
Publisher: Elsevier BV
Date: 04-2018
The Oligomerization of Dilute Ethylene Streams
Publisher: Elsevier
Date: 1994
An EXAFS investigation of chromocene on silica using empirical, semi- empirical and ab initio methods
Publisher: Elsevier BV
Date: 09-1996
Olefin oligomerization and isomerization catalysts. The preparation, properties and catalytic action of dithio nickel(II) complexes with chelating phosphines
Publisher: CSIRO Publishing
Date: 1986
DOI: 10.1071/CH9861129
Abstract: The syntheses and properties of cationic nickel complexes containing dithio-β-diketonate and chelating bisphosphine ligands of general formula [Ni{R1C(S)CR2C(S)R3}{(PL1L2)R(PL3L4)}]X(Rj,Lj = alkyl or aryl, R = (CH2)n, n = 1-4, X = halide, BPh4, PF6, etc.) are described. The compounds are shown to be effective catalysts for the oligomerization and double bond shift isomerization of olefins with a high specificity for dimeric products rich in desirable linear and near linear isomers.
Promoting the Formation of Active Sites with Ionic Liquids: A Case Study of MoS 2 as Hydrogen-Evolution-Reaction Electrocatalyst
Publisher: Wiley
Date: 23-09-2011
Zeolites - From curiosity to cornerstone
Publisher: Elsevier BV
Date: 07-2011
Partial oxidation of 4-tert-butyltoluene catalyzed by homogeneous cobalt and cerium acetate catalysts in the Br-/H2 O 2 /acetic acid system: Insights into selectivity and mechanism
Publisher: Wiley
Date: 19-09-2007
Abstract: The partial oxidation of 4-tert-butyltoluene to 4-tert-butylbenzaldehyde by hydrogen peroxide in glacial acetic acid, catalyzed by bromide ions in combination with cobalt(II) acetate or cerium(III) acetate, has been studied in detail. Based on the observed differences in reaction rates and product distributions for the different catalysts, a reaction mechanism involving two independent pathways is proposed. After the initial formation of a benzylic radical species, either oxidation of this intermediate by the metal catalyst or reaction with bromine generated in situ occurs, depending on which catalyst is used. The first pathway leads to the exclusive formation of 4-tert-butylbenzaldehyde, whereas reaction of the radical intermediate with bromine leads to formation of the observed side products 4-tert-butylbenzyl bromide and its hydrolysis and solvolysis products 4-tert-butylbenzyl alcohol and 4-tert-butylbenzyl acetate, respectively. The cobalt(II) catalysts Co(OAc)(2) and Co(acac)(2) are able to quickly oxidize the radical intermediate, thereby largely preventing the bromination reaction (i.e., side-product formation) from occurring, and yield the aldehyde product with 75-80 % selectivity. In contrast, the cerium catalyst studied here exhibits an aldehyde selectivity of around 50 % due to the competing bromination reaction. Addition of extra hydrogen peroxide leads to an increased product yield of 72 % (cerium(III) acetate) or 58 % (cobalt(II) acetate). Product inhibition and the presence of increasing amounts of water in the reaction mixture do not play a role in the observed low incremental yields.
Synthesis and characterisation of pentaphenylcyclo-pentadienyliron arene sandwich complex cations [Fe(η5-C5 Ph5 )(arene)]+ and the X-ray crystal structure of the [Fe(η5-C5 Ph5 )(η6-C 6 H5 Me)]+ cation
Publisher: Royal Society of Chemistry (RSC)
Date: 1991
DOI: 10.1039/DT9910001499
Application of Bismuth-Impregnated Mesoporous Silica to the Photochemical Oxidation of Methylene Blue: An Example of Nanoparticle Autocatalysis
Publisher: Wiley
Date: 18-02-2013
Fused Supracyclopentadienyl Ligand Precursors. Synthesis, Structure, and Some Reactions of 1,3-Diphenylcyclopenta[l]phenanthrene-2-one, 1,2,3-Triphenylcyclopenta[l]phenanthrene-2-ol, 1-Chloro-1,2,3-tr
Publisher: CSIRO Publishing
Date: 2006
DOI: 10.1071/CH05172
Abstract: The photochemical reaction of 1,3-diphenylcyclopenta[l]phenanthrene-2-one 5 (phencyclone) with oxygen in acetone leads to the formation of 1,2,3-trihydro-1,2,3-triphenylcyclo-penta[l]phenanthrene 7 (9,10-dibenzoylphenanthrene) along with a trace of the lactone 1,4-diphenylcyclo-3-pyran[l]phenanthrene-2-one 8. An independent synthesis of 8 was achieved by the reaction of 5 with FeCl3 in CHCl3. The treatment of 5 with phenyllithium yields 1,2,3-triphenylcyclopenta[l]phenanthrene-2-ol 9-OH in good yield. Subsequent reaction of 9-OH with SOCl2 or SOBr2 in pyridine leads to the formation of the halo-analogues 1-chloro-1,2,3-triphenylcyclopenta[l]phenanthrene 9-Cl and 1-bromo-1,2,3-triphenylcyclopenta[l]phenanthrene 9-Br, respectively. Treatment of 9-OH with HBr in acetic acid affords the rearranged product 1,1,3-triphenylcyclopenta[l]phenanthrene-2-one 10 with a trace of 9-Br. Treatment of 9-Cl or 9-Br with zinc in acetic acid affords 1,2,3-tri-phenyl-1H-cyclopenta[l]phenanthrene 9-H. 9,10-Phenanthrenediylbis(phenyl)methanone 7 is formed in good yield upon treatment of 9-OH with HI in acetic acid followed by heating with H2PO4. Compounds 7, 8, 9-Cl, 9-Br, and 10 have been structurally characterized using X-ray crystallography.
Interactions of Plasmonic Silver Nanoparticles with High Energy Sites on Multi-Faceted Rutile TiO2 Photoanodes
Publisher: Wiley
Date: 12-11-2019
Polymeric carbon nitride for solar hydrogen production
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC02532G
Abstract: The developments of polymeric carbon nitride in photocatalysis are reviewed focusing on the three primary processes of a photocatalytic reaction.
The chemistry of cobalt acetate. X. The preparations of the mixed ligand cobalt oligomers,Comparisons with homoleptic cobalt acetate dimers and trimers
Publisher: Elsevier BV
Date: 03-2013
Preparation and spectroscopy of anhydrous borosilicate sols and their application to thin films
Publisher: Elsevier BV
Date: 12-1998
Osmium silsesquioxane as model compound and homogeneous catalyst for the dihydroxylation of alkenes
Publisher: Elsevier BV
Date: 09-2004
The synthesis and characterization of norbornylsilasesquioxanes
Publisher: Wiley
Date: 05-1992
Tetraammonium diaquadiperoxidooctamolybdate(VI) tetrahydrate
Publisher: International Union of Crystallography (IUCr)
Date: 27-06-2009
The chemistry of cobalt acetate. VIII. New members of the family of oxo-centred trimers, see abstract
Publisher: Elsevier BV
Date: 04-2003
Hollow micro/nanomaterials as nanoreactors for photocatalysis
Publisher: AIP Publishing
Date: 10-2013
DOI: 10.1063/1.4826155
Abstract: Learning from nature, one of the most prominent goals of photocatalysis is to assemble multifunctional photocatalytic units in an integrated, high performance device that is capable of using solar energy to produce “solar hydrogen” from aqueous media. By analogy with natural systems it is clear that scaffolds with multi-scale structural architectures are necessary. In this perspective, recent progress related to the use of hollow micro/nanomaterials as nanoreactors for photocatalysis is discussed. Organised, multi-scale assemblies of photocatalytic units on hollow scaffolds is an emerging area that shows much promise for the synthesis of high performance photocatalysts. Not only do improved transport and diffusion characteristics play an import role, but increased electron/hole separation lifetimes as well as improved light harvesting characteristics by the hollow structures also do so and are touched upon in this short perspective.
Chemical Shifts of Quadrupole Nuclei. Applications of Mo‐95 and O‐17 NMR in Physical Organic Chemistry
Publisher: Wiley
Date: 09-1982
The Structures of the Decaphenylmetallocenium Cations of Chromium and Cobalt
Publisher: CSIRO Publishing
Date: 1997
DOI: 10.1071/C97075
Abstract: Decaphenylchromocenium and decaphenylcobaltocenium cations [M(η5-C5Ph5)2]+, M = Cr and Co, were synthesized by oxidation of the corresponding neutral decaphenylchromocene and decaphenylcobaltocene respectively with nitrosyl tetrafluoroborate. The complexes are air-stable and were fully characterized decaphenylchromocenium tetrafluoroborate (1) and decaphenylcobaltocenium tetrafluoroborate (2) were structurally characterized by X-ray crystallography. Crystals of (1) (as a water/methylene chloride solvate), C70·5H50BClCrF4O0·5, M 1079·42, are triclinic, space group P -1 (No. 2), a 13·634(5), b 17·424(5), c 13·298(4) Å, α 106·45(2), β 101·83(3), γ 74·56(2)°, Z 2. Crystals of (2) (as a water/methylene chloride solvate), C70·5H50BClCoF4O0·5, M 1086·36, are triclinic, space group P-1 (No. 2), a 13·633(2), b 17·683(3), c 13·255(3) Å, α 107·95(1), β 102·71(1), γ 73·23(1)°, Z2.
Revealing the Distribution of the Atoms within Individual Bimetallic Catalyst Nanoparticles
Publisher: Wiley
Date: 19-08-2014
Abstract: To be able to correlate the catalytic properties of nanoparticles with their structure, detailed knowledge about their make-up on the atomic level is required. Herein, we demonstrate how atom-probe tomography (APT) can be used to quantitatively determine the three-dimensional distribution of atoms within a Au@Ag nanoparticle with near-atomic resolution. We reveal that the elements are not evenly distributed across the surface and that this distribution is related to the surface morphology and residues from the particle synthesis.
Applications of Molybdenum-95 Nuclear Magnetic Resonance Spectroscopy. 3.1 Arenemolybdenum Tricarbonyl Derivatives
Publisher: American Chemical Society (ACS)
Date: 12-1981
DOI: 10.1021/IC50226A031
Decaphenylferrocene
Publisher: CSIRO Publishing
Date: 1995
DOI: 10.1071/CH9950851
Abstract: Decaphenylferrocene was obtained as an extremely insoluble, maroon microcrystalline solid by heating [(η5-C5Ph5)((η6-C6H5)C5Ph4)Fe], and was characterized by 57Fe Mossbauer spectroscopy, X-ray photoelectron spectroscopy, mass, electronic and vibrational spectroscopy, solid-state 13C n.m.r. spectroscopy and high-resolution X-ray powder diffraction, which showed it to be isostructural with decaphenylnickelocene.
Dinuclear alkynyllanthanoid(ii) dications with pentaphenylcyclopentadienyl or tri-tert-butyldiphosphacyclopentadienyl counter ions
Publisher: Royal Society of Chemistry (RSC)
Date: 2006
DOI: 10.1039/B514358F
Abstract: Reaction of [Yb(CpPh5)(C[triple bond]CPh)(thf)]2 (CpPh5 = pentaphenylcyclopentadienyl), prepared from Yb(C triple bond CPh)2 and HCpPh5 or Yb metal, HgPh(C[triple bond]CPh) and HCpPh5, with a controlled amount of diglyme (dig), and of Eu(C triple bond CPh)2, P triple bond CBut and dig, yield the unusual organolanthanoid(II) dicationic complexes [Yb(C[triple bond]CPh)(dig)(thf)2]2[CpPh5]2.4thf and [Eu(C triple bond CPh)(dig)2]2[P2C3But3]2 respectively.
Electrochemistry of chlorinated ferrocenes: Stability of chlorinated ferrocenium ions
Publisher: Royal Society of Chemistry (RSC)
Date: 1993
DOI: 10.1039/DT9930000835
Hydrothermal Liquefaction of α‐O‐4 Aryl Ether Linkages in Lignin
Publisher: Wiley
Date: 27-02-2020
Abstract: By using lignin model compounds with relevant key characteristic structural features, the reaction pathways of α-O-4 aryl ether linkages under hydrothermal conditions are elucidated. Experimental results and computational modeling suggest that the α-O-4 linkages in lignin undergo catalyzed hydrolysis and elimination to give phenolic and alkenylbenzene derivatives as major products in subcritical water. The decreased relative permittivity of water at these high temperatures and pressures facilitates the elimination reactions. The alkyl group on the α-carbon and the methoxy groups on the phenyl rings both have positive effects on the rate of conversion of α-O-4 linkages in native lignin.
Authentication and Data Hiding Using a Hybrid ROI-Based Watermarking Scheme for DICOM Images
Publisher: Springer Science and Business Media LLC
Date: 25-11-2009
Unravelling Some of the Key Transformations in the Hydrothermal Liquefaction of Lignin
Publisher: Wiley
Date: 21-04-2017
Abstract: Using both experimental and computational methods, focusing on intermediates and model compounds, some of the main features of the reaction mechanisms that operate during the hydrothermal processing of lignin were elucidated. Key reaction pathways and their connection to different structural features of lignin were proposed. Under neutral conditions, subcritical water was demonstrated to act as a bifunctional acid/base catalyst for the dissection of lignin structures. In a complex web of mutually dependent interactions, guaiacyl units within lignin were shown to significantly affect overall lignin reactivity.
Solar hydrogen from an aqueous, noble-metal-free hybrid system in a continuous-flow sampling reaction system
Publisher: Wiley
Date: 14-05-2014
Abstract: We introduce the visible-light photocatalytic H2 evolution reaction as catalyzed by a cobaloxime/carbon nitride (C3N4) noble-metal-free hybrid photosystem by using a continuous-flow s ling reaction system. The photocatalytic H2 evolution rate is highly dependent on the structure of C3N4, in which porous C3N4 shows the best activity compared with bulk C3N4 (lamellar) and C3N4 nanosheets. When using porous C3N4, the system is neither affected by the solution pH, nor the C3N4 concentration, nor the structure of the cobaloxime complex.
29Si n.m.r. of aqueous tetrapropylammonium silicate solutions
Publisher: Elsevier BV
Date: 10-1982
Redox Properties of Thiolate Compounds of Oxomolybdenum(V) and Their Tungsten and Selenium Analogues
Publisher: American Chemical Society (ACS)
Date: 04-1981
DOI: 10.1021/JA00398A014
Masked N-Heterocyclic Carbene-Catalyzed Alkylation of Phenols with Organic Carbonates
Publisher: Wiley
Date: 16-08-2016
Abstract: An easily prepared masked N-heterocyclic carbene, 1,3-dimethylimidazolium-2-carboxylate (DMI-CO2 ), was investigated as a "green" and inexpensive organocatalyst for the alkylation of phenols. The process made use of various low-toxicity and renewable alkylating agents, such as dimethyl- and diethyl carbonate, in a focused microwave reactor. DMI-CO2 was found to be a very active catalyst and excellent yields of a range of aryl alkyl ethers were obtained under relatively benign conditions. The observed difference in the conversion behavior of phenol methylation, in the presence of either the carbene or 1,8-diazabicycloundec-7-ene (DBU) catalyst, was rationalized on the basis of mechanistic investigations. The primary mode of action for the N-heterocyclic carbene is nucleophilic catalysis. Activation of the dialkyl carbonate electrophile results in concomitant evolution of an organo-soluble alkoxide, which deprotonates the phenolic starting material. In contrast, DBU is initially protonated by the phenol and thus consumed. Subsequent regeneration and participation in nucleophilic catalysis only becomes significant after some phenolate alkylation occurs.
Electrochemical investigation of [Co4 (μ3 -O)4 (μ-OAc)4 (py)4 ] and peroxides by cyclic voltammetry
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC08412E
Abstract: Electrochemical investigation of the cobalt cubane Co 4 (μ 3 -O) 4 (μ-OAc) 4 (py) 4 reveals a second quasi-reversible oxidation which can oxidise peroxides.
Microwave-assisted methylation of dihydroxybenzene derivatives with dimethyl carbonate
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA09841J
Abstract: Dihydroxybenzene derivatives were methylated with dimethyl carbonate to generate useful synthetic intermediates for wide range of applications.
Tuning the photocatalytic activity of CdS nanocrystals through intermolecular interactions in ionic-liquid solvent systems
Publisher: Wiley
Date: 27-01-2012
Abstract: Synthetic solvent systems for the fine-tuned preparation of CdS nanocrystallites, active in visible-light photocatalytic hydrogen production, were studied. To control crystallite size and spectral properties, the CdS crystals were synthesised by using different solvent systems, containing a series of tetrabutylammonium amino carboxylate ionic liquids as the crystal-growth control agents. Six s les of CdS, all with similar physical and spectral properties, exhibited greatly varying photocatalytic activity, with the most active s le outperforming the least active one by almost 60%. To rationalise this effect, the intermolecular interactions of the synthesis solvent system with the growing CdS nanocrystallites were characterised by using the Reichart betaine dye and the E(T)(N) polarity scale. A correlation was observed between the E(T)(N) values of the solvent system and the photocatalytic activity of the CdS nanocrystallite, suggesting that the hydrogen-bond-donating ability and/or dipolarity olarisability interactions of the solvent system led to the preferential formation of active surfaces/surface sites on the CdS crystals.
Supported Metal Cluster Compounds as Precursors of Fischer-Tropsch Catalysts
Publisher: Elsevier BV
Date: 02-1989
Investigation of M1/M4 Muscarinic Receptors in the Anterior Cingulate Cortex in Schizophrenia, Bipolar Disorder, and Major Depression Disorder
Publisher: Springer Science and Business Media LLC
Date: 17-12-2003
A nano-engineered graphene/carbon nitride hybrid for photocatalytic hydrogen evolution
Publisher: Elsevier BV
Date: 03-2016
Pseudo-encapsulation-nanodomains for enhanced reactivity in ionic liquids
Publisher: Wiley
Date: 12-10-2012
Facile synthesis of ionic liquids possessing chiral carboxylates
Publisher: Elsevier BV
Date: 10-2006
Fullerene matrices in the MALDI-TOF mass spectroscopic characterisation of organometallic compounds
Publisher: Elsevier BV
Date: 02-2014
An ITQ-2/TUD-1 Micro-/Mesoporous Composite: InSitu Delamination as a Tool for the Preparation of Innovative Materials
Publisher: Wiley
Date: 27-09-2011
A palladium-catalyzed multicascade reaction: Facile low-temperature hydrogenolysis of activated nitriles and related functional groups
Publisher: Wiley
Date: 08-07-2011
The oligomerization of olefins derived from partial methane oxidation
Publisher: Elsevier
Date: 1988
Comment on Trondheim Paper
Publisher: Elsevier BV
Date: 05-2015
Changing the action of iron from stoichiometric to electrocatalytic in the hydrogenation of ketones in aqueous acidic media
Publisher: Wiley
Date: 18-09-2015
Abstract: Cyclohexanone, a model compound chosen to conveniently represent small oxygenates present in the aqueous phase of biomass hydrothermal upgrading streams, was hydrogenated in the presence of electrodeposited iron(0) using aqueous formic or sulfuric acid as a hydrogen donor. Under these conditions, zero-valent iron is consumed stoichiometrically and serves as both a formic acid decomposition site and a hydrogen transfer agent. However, the resulting iron(II) can be used to continuously regenerate iron(0) when a potential is applied to the glassy carbon working electrode. Controlled potential electrolysis experiments show a 17% conversion of cyclohexanone (over 1000 seconds) to cyclohexanol with >80% efficiency of iron deposition from an iron(II) sulfate solution containing formic or sulfuric acid. In the absence of electrodeposited iron, formation of cyclohexanol could not be detected.
Robust bimetallic Pt-Ru catalysts for the rapid hydrogenation of toluene and tetralin at ambient temperature and pressure
Publisher: Elsevier BV
Date: 03-2013
Probing the low surface brightness dwarf galaxy population of the virgo cluster
Publisher: Oxford University Press (OUP)
Date: 24-12-2015
Zinc Electrodeposition in the Presence of an Aqueous Electrolyte Containing 1-Ethylpyridinium Bromide: Unexpected Oddities
Publisher: CSIRO Publishing
Date: 2017
DOI: 10.1071/CH17281
Abstract: The reversible electrodeposition of zinc was investigated in an aqueous electrolyte containing zinc bromide (50 mM) and 1-ethylpyridinium bromide ([C2Py]Br, 50 mM) by cyclic voltammetry, chrono erometry, and scanning electron microscopy. Unusual voltammetric behaviour for the Zn/ZnII redox couple was observed in the presence of [C2Py]Br. Passivation of the redox couple was observed after a single deposition–stripping cycle at switching potentials more negative than −1.25 V versus Ag/AgCl. This unusual behaviour was attributed to the reduction of 1-ethylpyridinium cations to pyridyl radicals and their follow-up reactions, which influenced the zinc electrochemistry. This behaviour was further seen to modify the nucleation process of electrodeposition, which altered the morphology of zinc electrodeposits.
Synthesis and non-linear optical properties of (η5-pentaphenylcyclopentadienyl)dicarbonylruthenium(II) σ-alkenyl complexes
Publisher: Elsevier BV
Date: 03-2005
Bromozincate ionic liquids in the Knoevenagel condensation reaction
Publisher: Elsevier BV
Date: 04-2018
Three dimensional in vitro models of cancer: Bioprinting multilineage glioblastoma models
Publisher: Elsevier BV
Date: 2020
DOI: 10.1016/J.JBIOR.2019.100658
Abstract: Three dimensional (3D) bioprinting of multiple cell types within optimised extracellular matrices has the potential to more closely model the 3D environment of human physiology and disease than current alternatives. In this study, we used a multi-nozzle extrusion bioprinter to establish models of glioblastoma made up of cancer and stromal cells printed within matrices comprised of alginate modified with RGDS cell adhesion peptides, hyaluronic acid and collagen-1. Methods were developed using U87MG glioblastoma cells and MM6 monocyte/macrophages, whilst more disease relevant constructs contained glioblastoma stem cells (GSCs), co-printed with glioma associated stromal cells (GASCs) and microglia. Printing parameters were optimised to promote cell-cell interaction, avoiding the 'caging in' of cells due to overly dense cross-linking. Such printing had a negligible effect on cell viability, and cells retained robust metabolic activity and proliferation. Alginate gels allowed the rapid recovery of printed cell protein and RNA, and fluorescent reporters provided analysis of protein kinase activation at the single cell level within printed constructs. GSCs showed more resistance to chemotherapeutic drugs in 3D printed tumour constructs compared to 2D monolayer cultures, reflecting the clinical situation. In summary, a novel 3D bioprinting strategy is developed which allows control over the spatial organisation of tumour constructs for pre-clinical drug sensitivity testing and studies of the tumour microenvironment.
Unprecedented blue-shift in bismuth oxide supported on mesoporous silica
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2NJ40847C
Oxidation of adamantane by palladium acetate systems
Publisher: Elsevier BV
Date: 11-1999
Photocatalytic hydrogen evolution from silica-templated polymeric graphitic carbon nitride-is the surface area important?
Publisher: Wiley
Date: 19-10-2015
General discussion
Publisher: Royal Society of Chemistry (RSC)
Date: 1989
DOI: 10.1039/DC9898700345
Molybdenum-95 NMR of molybdenumsulfur and selenium species, structural charaterisation of the [(CN)CuS2 MoS2 ]2- anion
Publisher: Elsevier BV
Date: 1981
Exploring the myth of nascent hydrogen and its implications for biomass conversions
Publisher: Wiley
Date: 05-09-2012
Abstract: Iron (and to a lesser extent manganese) in the wall of a 316 stainless steel (SS) reactor is responsible for the hydrogenation of cyclohexanone to cyclohexanol when using an aqueous formic acid solution under high temperature and pressure water (HTPW) conditions. However, not only dilute formic acid but also aqueous solutions of several other organic and mineral acids in the presence of iron are active in this reaction covering a range of aldehydes and ketones, even under ambient conditions. The stoichiometry, kinetics, and the possible mechanisms of both dihydrogen production as well as of the hydrogenation of the model compound cyclohexanone were examined. The reduction is essentially stoichiometric with respect to metallic iron, and the conversions are highly dependent on the speed of stirring as well as temperature and reactant concentrations. Importantly, it is established unequivocally that water participates in dihydrogen gas formation (hydrogen atoms originate from both the acid and water molecules) and facilitates substrate reduction.
Oligomerization and isomerization of olefins by catalysts derived from nickel complexes of dithio-β-diketonates
Publisher: Royal Society of Chemistry (RSC)
Date: 1993
DOI: 10.1039/DT9930000059
1,3-Disubstituted imidazolium hydroxides: Dry salts or wet carbenes?
Publisher: Elsevier BV
Date: 02-2013
The role of the reactor wall in hydrothermal biomass conversions
Publisher: Wiley
Date: 05-09-2012
Abstract: The processing of renewable feedstocks to platform chemicals and, to a lesser degree, fuels is a key part of sustainable development. In particular, the combination of lignocellulosic biomass with hydrothermal upgrading (HTU), using high temperature and pressure water (HTPW), is experiencing a renaissance. One of the many steps in this complicated process is the in‐situ hydrogenation of intermediate compounds. As formic acid and related low‐molecular‐weight oxygenates are among the species generated, it is conceivable that they act as a hydrogen source. Such hydrogenations have been suggested to be catalyzed by water, by bases like NaOH, and/or to involve “reactive/nascent hydrogen”. To achieve the temperatures and pressures required for HTU, it is necessary to conduct the reactions in high‐pressure vessels. Metals are typical components of their walls and/or internal fittings. Here, using cyclohexanone as a model compound for more complex biomass‐derived molecules, iron in the wall of high‐pressure stainless steel reactors is shown to be responsible for the hydrogenation of ketones with low‐molecular‐weight oxygenates acting as a hydrogen source in combination with water.
Molecular Cobalt Clusters as Precursors of Distinct Active Species in Electrochemical, Photochemical, and Photoelectrochemical Water Oxidation Reactions in Phosphate Electrolytes
Publisher: Wiley
Date: 25-09-2015
Abstract: Three cobalt model molecular compounds, Co‐cubane ([Co 4 (µ 3 ‐O) 4 (µ‐OAc) 4 py 4 ]), Co‐trimer ([Co 3 (μ 3 ‐O)(µ‐OAc) 6 py 3 ]PF 6 ), and Co‐dimer ([Co 2 (μ‐OH) 2 (µ‐OAc)(OAc) 2 py 4 ]PF 6 ), are investigated as water oxidation reaction (WOR) catalysts, using electrochemical, photochemical, and photoelectrochemical methodologies in phosphate electrolyte. The actual species contributing to the catalytic activity observed in the WOR are derived from the transformation of these cobalt compounds. The catalytic activity observed is highly dependent on the initial compound structure and on the particular WOR methodology used. Co‐cubane shows no activity in the electrochemical WOR and negligible activity in the photochemical WOR, but is active in the photoelectrochemical WOR, in which it behaves as a precursor to catalytically active species. Co‐dimer also shows no activity in the electrochemical WOR, but behaves as a precursor to catalytically active species in both the photochemical and photoelectrochemical WOR experiments. Co‐trimer behaves as a precursor to catalytically active species in all three of the WOR methodologies.
Probing structure-functionality relationships of catalytic bimetallic Pt-Ru nanoparticles associated with improved sulfur resistance
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA03474K
Enhanced Photocatalytic Hydrogen Evolution with TiO2-TiN Nanoparticle Composites
Publisher: American Chemical Society (ACS)
Date: 17-01-2019
Controlling hydrolysis reaction rates with binary ionic liquid mixtures by tuning hydrogen-bonding interactions
Publisher: American Chemical Society (ACS)
Date: 06-02-2012
DOI: 10.1021/JP211543V
Abstract: The ability of a binary ionic liquid (IL) system consisting of a phosphonium transition state analogue (TSA) and 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([BMIM][NTf(2)]) to accelerate the rate of the well-studied hydrolysis of a tert-alkyl picolinium salt by influencing the solvent structure was investigated. A significant rate enhancement was observed in the presence of the TSA however, comparison with other cations illustrated that this enhancement was not unique to the chosen TSA. Instead, the rate enhancements were correlated with the dilution of hydrogen bonding by the added cations. This phenomenon was further examined by the use of 1-butyl-2,3-dimethylimidazolium bis(trifluoromethanesulfonyl)imide ([BMMIM][NTf(2)]) as a cosolvent and the use of Reichardt's dye to measure the extent of hydrogen bonding on solutes in these systems. The rate increases are rationalized in terms of weaker hydrogen bonding from the solvent system to water.
The preparation, crystal structure and some reaction chemistry of Bromo (η5-penta- phenylcyclopentadienyl) dicarbonylosmium (II) , [Os (η5-C5Ph5) (CO) 2Br]
Publisher: Elsevier BV
Date: 06-1998
Strained surface siloxanes as a source of synthetically important radicals
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA20399F
Abstract: The calcination of pure amorphous silica at temperatures up to 850 °C results in the formation of strained siloxane rings which are capable of undergoing homolytic cleavage to generate radicals when in the presence of an appropriate substrate.
Selenium chelates. Preparation and X-ray structure determination of methyl(diethyldiselenocarbamato)(triphosphine)platinum(II), Pt(Se2 CNEt2 )(CH3 )(PPh3 )
Publisher: Elsevier BV
Date: 1979
Ionic-liquid-mediated active-site control of MoS 2 for the electrocatalytic hydrogen evolution reaction
Publisher: Wiley
Date: 15-05-2012
Abstract: The layered crystal MoS(2) has been proposed as an alternative to noble metals as the electrocatalyst for the hydrogen evolution reaction (HER). However, the activity of this catalyst is limited by the number of available edge sites. It was previously shown that, by using an imidazolium ionic liquid as synthesis medium, nanometre-size crystal layers of MoS(2) can be prepared which exhibit a very high number of active edge sites as well as a de-layered morphology, both of which contribute to HER electrocatalytic activity. Herein, it is examined how to control these features synthetically by using a range of ionic liquids as synthesis media. Non-coordinating ILs with a planar heterocyclic cation produced MoS(2) with the de-layered morphology, which was subsequently shown to be highly advantageous for HER electrocatalytic activity. The results furthermore suggest that the crystallinity, and in turn the catalytic activity, of the MoS(2) layers can be improved by employing an IL with specific solvation properties. These results provide the basis for a synthetic strategy for increasing the HER electrocatalytic activity of MoS(2) by tuning its crystal properties, and thus improving its potential for use in hydrogen production technologies.
Carbon monoxide poisoning as a probe for the active site(s) of a nickel‐based olefin oligomerization catalyst
Publisher: Wiley
Date: 09-1990
Ionic liquid-templated preparation of mesoporous silica embedded with nanocrystalline sulfated zirconia
Publisher: Springer Science and Business Media LLC
Date: 02-03-2011
Abstract: A series of mesoporous silicas impregnated with nanocrystalline sulphated zirconia was prepared by a sol-gel process using an ionic liquid-templated route. The physicochemical properties of the mesoporous sulphated zirconia materials were studied using characterisation techniques such as inductively coupled optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray microanalysis, elemental analysis and X-ray photoelectron spectroscopy. Analysis of the new silicas indicates isomorphous substitution of silicon with zirconium and reveals the presence of extremely small ( 10 nm) polydispersed zirconia nanoparticles in the materials with zirconium loadings from 27.77 to 41.4 wt.%.
Sulfur Chelates. 38. Preparations and X-ray Structure Determinations of M(S2 CNEt2 )(PR3 )Cl (M = Ni, R = Et; M = Pd, Pt, R = C6 H5 )
Publisher: American Chemical Society (ACS)
Date: 12-1982
DOI: 10.1021/IC00142A034
The chemistry of cobalt acetate - III. The isolation and crystal structure characterisation of the mixed valence octacobalt oligomer, [Co8 (O)4 (CH3 CO2 ) 6 (OMe)4 ]Cl4 (OHn ) 4 ·6H2 O (n = 1 or 2), derived from the preparation of cobalt(III) acetate
Publisher: Elsevier BV
Date: 04-1997
Immobilisation of Homogeneous Pd Catalysts within a Type I Porous Liquid
Publisher: CSIRO Publishing
Date: 2020
DOI: 10.1071/CH20256
Abstract: An N-heterocyclic carbene-based palladium complex was successfully immobilised on the inner surfaces of hollow silica nanospheres. The external surfaces of these spheres were functionalised with a corona-canopy to produce a Type I porous liquid. To confirm the successful immobilisation of the catalytic precursor, the porous liquid system was explored using the Heck reaction as a model reaction. This work demonstrated that homogeneous catalysts can be successfully immobilised within porous liquids in principle and that the approach used could be readily adapted for the immobilisation of other systems.
Applications of 95Mo NMR. 8. Molybdenum(0) Carbonyl Derivatives of Phosphines, Phosphites, and Related Ligands
Publisher: American Chemical Society (ACS)
Date: 03-1983
DOI: 10.1021/IC00148A014
Hydrogen from Formic Acid through Its Selective Disproportionation over Sodium Germanate - A Non-Transition-Metal Catalysis System
Publisher: Wiley
Date: 28-08-2014
Abstract: A robust catalyst for the selective dehydrogenation of formic acid to liberate hydrogen gas has been designed computationally, and also successfully demonstrated experimentally. This is the first such catalyst not based on transition metals, and it exhibits very encouraging performance. It represents an important step towards the use of renewable formic acid as a hydrogen-storage and transport vector in fuel and energy applications.
Salt-enhanced photocatalytic hydrogen production from water with carbon nitride nanorod photocatalysts: cation and pH dependence
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA04942H
Abstract: Carbon nitride polymeric semiconductors with nanorod morphology are explored as photocatalysts for efficient hydrogen evolution from water.
The chemistry of cobalt acetate - IV.† the isolation and crystal structure of the symmetric cubane, tetrakis[(μ-acetato)(μ3 -oxo) (pyridine)cobalt(III)] chloroform solvate, [Co4 (μ-O)4 (μ-CH3 CO2 ) 4 (C5 H5 N)4 ] 5CHCl3 and of the dicationic partial cubane, trimeric
Publisher: Elsevier BV
Date: 1998
Influence of oxygen and sulphur donor atoms on the electrochemistry of bis-chelates of nickel(II)
Publisher: Elsevier BV
Date: 09-1976
The influence of pyridinium-based additives on zinc electrodeposition in aqueous solution
Publisher: The Electrochemical Society
Date: 2019
DOI: 10.1149/2.0731906JES
Structural studies on catalysts and catalyst precursors. The X-Ray structure determination of (3-Allylpentane-2, 4-dithionato)chloro(triethyl-phosphine)nickel(II), Ni(asacsac)(PEt3 )Cl
Publisher: CSIRO Publishing
Date: 1984
DOI: 10.1071/CH9840273
Abstract: The preparation and characterization of Ni(asacsac)(PEt3)Cl by single-crystal X-ray diffraction [refined to R = 0,049, R' = 0,052 with 1888 data having I ≥ 3σ(I)], are reported. The compound crystallizes as discrete molecules in the monoclinic space group P21/c, with a = 10,078(2), b = 8.202(3), c = 22.984(5) �, β = 97.57(2)�, U = 1883.3 �3 and Z = 4. The nickel-donor atom bond distances are Ni-S (trans Cl) 2.083(2), Ni-S (trans P) 2.127(2), Ni-Cl 2.208(2) and Ni-P 2,234(2) �, with the ligands at angles S-Ni-S 96.8(1), S-Ni-C1 86.2(1), S-Ni-P 90.7(1) and Cl-Ni-P 86.9(1)�. The coordination about the nickel(11) centre is approximately planar, but the planes NiSS and NiPCl are inclined at 8.3�. Comparisons are made with the structures of related compounds, in particular, that of Ni(sacsac)PEt3Cl.
Effective Removal of Toxic Heavy Metal Ions from Aqueous Solution by CaCO3 Microparticles
Publisher: Springer Science and Business Media LLC
Date: 04-2018
Sulphur chelates 33. Preparation, characterization and x-ray structure determination of (chloro)(pentane-2,4-dithionato)(triethylphosphine)nickel(II), Ni(SacSac)(PEt3 )Cl, an asymmetric complex which displays fluxional behavior in solution on the NMR time scale
Publisher: Elsevier BV
Date: 1980
Optimised heterojunctions between [100]-oriented rutile TiO 2 arrays and {001} faceted anatase nanodomains for enhanced photoelectrochemical activity
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8SE00022K
Abstract: This work showcases the application of crystal and facet engineering combined with techniques to provide insights into the development of materials for solar energy conversion.
The formation of high-order polybromides in a room-temperature ionic liquid: From monoanions ([Br5]- to [Br11]-) to the isolation of [PC16H36]2[Br24] as Determined by van der Waals Bonding Radii
Publisher: Wiley
Date: 08-12-2015
Abstract: An unprecedented ersity of high-order bromine catenates (anionic polybromides) was generated in a tetraalkylphosphonium-based room temperature ionic liquid system. Raman spectroscopy was used to identify polybromide monoanions ranging from [Br5 ](-) to [Br11 ](-) in the bulk solution, while single-crystal X-ray diffraction identified extended networks of linked [Br11 ](-) units, forming a previously unknown polymeric [Br24 ](2-) dianion. This represents the largest polybromide species identified to date. In combination with recent work, this suggests that other, higher order molecular polybromide ions might be isolated.
Cobalt(II) Carboxylate Chemistry and Catalytic Applications
Publisher: Elsevier
Date: 2013
A comparison of photocatalytic reforming reactions of methanol and triethanolamine with Pd supported on titania and graphitic carbon nitride
Publisher: Elsevier BV
Date: 2019
Elements of Country: a First Nations-first approach to chemistry
Publisher: Walter de Gruyter GmbH
Date: 03-2023
Abstract: Collectively, we have chosen to explore an Australian First Nations-first approach to understanding the chemical elements. We believe that engagement with cultural heritage, ongoing cultures, and the knowledges of this place —the lands on which we work, live, and study—will lead to new ways of understanding the elements and change the way we practice chemistry. The “First Nations first” phrase and approach comes from understanding the unique place that Aboriginal and Torres Strait Islander peoples have in the Australian context. In this paper we explore how a First Nations-first approach could take place in Sydney on Aboriginal lands. This approach is led by Aboriginal people, engages with culture, and is produced with local knowledge holders. So far, the work has entailed two years of meeting, conversing, and sharing space to determine appropriate ways of working together, interrogating the complexities of the ideas, and to refining our approach to the work. To appreciate the significant shift that a First Nations-first approach represents for chemistry, we consider the legacy of the Periodic Table. We share some reflections on how Indigenous knowledges can contribute to an expanded chemistry curriculum through the recognition of productive cultural tension.
Catalyst compartmentalization in Dynamic Kinetic Resolutions
Publisher: Springer Science and Business Media LLC
Date: 27-03-2008
Critical review: hydrothermal synthesis of 1T-MoS2 – an important route to a promising material
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA01230D
Abstract: The unique anisotropy, polytypism, and abundance of molybdenum disulfide make it a singularly versatile material for a range of catalytic, electrochemical, and tribological applications.
Novel bis(methylimidazolium)alkane bolaamphiphiles as templates for supermicroporous and mesoporous silicas
Publisher: Elsevier BV
Date: 2012
Raymond L. Martin
Publisher: CSIRO Publishing
Date: 1995
DOI: 10.1071/CH9950701
Abstract: No Abstract Available.
The oligomerization of lower olefins by catalysts derived from Ni(sacsac)(PBu3 )Cl
Publisher: Elsevier BV
Date: 1990
The synthesis and characterization of decaphenyltitanocene dichloride [Ti(η5-C5Ph5)2Cl2], and of [Ti(η5-C5Ph3)((C6H11)7Si7O12)], the first pentaphenylcyclopentadienyl polyhedral oligosilsesquioxane
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/CH9941127
Abstract: The syntheses and characterization of the compounds [Ti(η5-C5Ph5)2Cl2] and [Ti(η5-C5Ph5)((c-C6H11)7Si7O12)] by infrared, 1H, 13C and 29Si n.m.r. and mass spectroscopy are described.
Pre- and post-harvest treatment of macroalgae to improve the quality of feedstock for hydrothermal liquefaction
Publisher: Elsevier BV
Date: 10-2014
Tris(dithioacetylacetonato)chromium(III)
Publisher: CSIRO Publishing
Date: 1972
DOI: 10.1071/CH9722547
Abstract: The synthesis of the first dithioaoetylacetonate of a Group VI transition metal has been achieved by reduction of the 3,5-dimethyl-1,2-dithiolium cation with alent chromium. The physical properties of the dark green monomer [Cr(SacSac)3] are reported.
Silsesquioxanes as molecular analogues of single-site heterogeneous catalysts
Publisher: The Royal Society
Date: 21-03-2012
Abstract: We discuss herein selected ex les of metal complexes of polyhedral oligosilses-quioxanes (POSSs) as models of single-site heterogeneous surface catalysts. The utility of these compounds as such models is illustrated when employed as analogues of single-site titanium species supported on a silica surface. Deep insights into structure–functionality relationships can be gained. In particular, it was possible to probe the relationship between accessibility of the reactive centre and turnover frequencies in a manner that is impossible for a purely heterogeneous catalyst. We also report that the partially dehydroxylated SiO 2 surface alone is an effective radical polymerization initiation catalyst. This surface reactivity is modelled by the solution reactions between the olefin substrate and two POSSs, the completely condensed triganol prism, Si 6 Cy 6 O 9 ( a6b0 , Cy = Cyclohexyl, C 6 H 11 ), and the incompletely condensed partial cube, Si 7 Cy 7 O 9 (OH) 3 ( a7b3 ). The former, with six-membered Si 3 O 3 rings, is a catalyst. The latter, without this feature, is not. Similar reactivity discrimination is observed in the gas phase reactions of these POSSs with the olefin substrate, examined using atmospheric pressure chemical ionization- and collision-induced decomposition spectroscopies. Silsesquioxane a6b0 , containing Si 3 O 3 rings, reacts with the olefin, forming grafted olefin monomers and dimers, while this reactivity is not observed with silsesquioxane a7b3 .
A comparative assessment of the activity and structure of phlorotannins from the brown seaweed Carpophyllum flexuosum
Publisher: Elsevier BV
Date: 2018
Chemistry of Cobalt Acetate. 7. Electrochemical Oxidation of μ3-Oxo-Centered Cobalt(III) Acetate Trimers
Publisher: American Chemical Society (ACS)
Date: 07-11-2003
DOI: 10.1021/IC0345525
Abstract: Electrochemical and spectroelectrochemical properties of five cobalt(III) acetate complexes [CoIII3(mu3-O)(CH3CO2)5(OR)(py)3][PF6] are described, where py=pyridine and R=OCCH3 (A), H (B), CH3 (C), CH2CH=CH2 (D), and CH2C6H5 (E). Each is reduced irreversibly as observed by cyclic voltammetry at room temperature and at -40 degrees C in acetonitrile at scan rates up to 20 V s(-1), but oxidized reversibly to a mixed-valence Co(III)2Co(IV) species at approximately 1.23 V vs the ferrocenium/ferrocene couple. Controlled potential coulometry confirmed a one-electron-oxidation process. Spectroelectrochemical oxidation of A at 5 degrees C showed isosbestic points in the electronic absorption spectrum that showed the oxidized complex to be stable in solution for at least 1 h.
Metal/bromide autoxidation of triglycerides for the preparation of FAMES to improve the cold-flow characteristics of biodiesel
Publisher: Elsevier BV
Date: 09-2014
Manganese complexes of the pentaphenylcyclopentadienyl ligand
Publisher: Elsevier BV
Date: 05-2006
X-ray Absorption Spectroscopic Studies of Chromium(V/IV/III)-2-Ethyl-2-hydroxybutanoato(2-/1-) Complexes
Publisher: American Chemical Society (ACS)
Date: 07-01-2004
DOI: 10.1021/IC030239R
Abstract: Structures of the complexes [Cr(V)O(ehba)(2)](-), [Cr(IV)O(ehbaH)(2)](0), and [Cr(III)(ehbaH)(2)(OH(2))(2)](+) (ehbaH(2) = 2-ethyl-2-hydroxybutanoic acid) in frozen aqueous solutions (10 K, [Cr] = 10 mM, 1.0 M ehbaH(2)/ehbaH, pH 3.5) have been determined by single- and multiple-scattering fitting of X-ray absorption fine structure (XAFS) data. An optimal set of fitting parameters has been determined from the XAFS calculations for a compound with known crystal structure, Na[Cr(V)O(ehba)(2)] (solid, 10 K). The structure of the Cr(V) complex [Cr(V)O(ehba)(2)](-) does not change in solution in the presence of excess ligand. Contrary to the earlier suggestions made from the kinetic data (Ghosh, M. C. Gould, E. S. J. Chem. Soc., Chem. Commun. 1992, 195-196), the structure of the Cr(IV) complex (generated by the Cr(VI) + As(III) + ehbaH(2) reaction) is close to that of the Cr(V) complex (five-coordinate, distorted trigonal bipyramidal) and different from that of the Cr(III) complex (six-coordinate, octahedral). For both Cr(V) and Cr(IV) complexes, some disorder in the position of the oxo group is observed, which is consistent with but not definitive for the presence of geometric isomers. The structure of the Cr(IV) complex differs from that of Cr(V) by protonation of alcoholato groups of the ligands, which leads to significant elongation of the corresponding Cr-O bonds (2.0 vs 1.8 A). This is reflected in the different chemical properties reported previously for the Cr(IV) and Cr(V) complexes, including their reactivities toward DNA and other biomolecules in relation to Cr-induced carcinogenicity.
Applications of Molybdenum-95 N.M.R. Spectroscopy. X Polyoxomolybdates
Publisher: CSIRO Publishing
Date: 1984
DOI: 10.1071/CH9841825
Abstract: An initial survey of the 95Mo n.m.r. properties of a range of 12 polyoxomolybdates is presented. The species resonate in the range - 18 to + 140 ppm. The observed line widths generally exceed 100 Hz for six-coordinate molybdenum sites of low symmetry, but can be narrow ( 20 Hz at 20�) for four-coordinate sites. Aqueous solutions of [Mo7O24]6- at pH 6.1 exhibit exchange between Mo- and Mo7-based species. Solutions of α-[Mo8O26]4- in MeCN feature a single narrow resonance (δ16, Wh/2 23 Hz at 20�) assigned to the tetrahedral capping sites, while two broad resonances (δ19, Wh/2 240 Hz δ109, Wh/2 C. 270 HZ) are seen in equivalent solutions of β-[Mo8O26]4-. In the cases cited above, 17O n.m.r. is used to confirm the integrity of s le solutions and assists in correction of the 95Mo n.m.r. properties of β-[Mo8O26]4 reported in a previous communication.
Controlling viscosity in methyl oleate derivatives through functional group design
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NJ01453G
Abstract: The effect of molecular structure on commercially relevant lubrication properties is elucidated in a set of 16 renewable oleate derivatives.
The reactions of electrogenerated [ni(sacsac)2 ]: Biomimetic chemistry related to nickel enzymes
Publisher: CSIRO Publishing
Date: 1995
DOI: 10.1071/CH9950835
Abstract: The electrochemical reduction of [Ni( sacsac )2] ( sacsac = C5H7S2- = pentane-2,4-dithionate) has been investigated by cyclic voltammetry and controlled-potential electrolysis in acetone/tetra- butylammonium tetrafluoroborate (0.1 M). The reactions of the reduction product(s) with CO, CO2, CH3I, C12H25SH, light and water have been surveyed. At a scan rate of 100 mV s-1, [Ni( sacsac )2] (0.5 mM ) undergoes a quasi-reversible one-electron reduction (∆ Ep = 88 mV) at -1.543 V (v. Fc+/0) and an irreversible four-electron oxidation at +0.635 V. The oxidation generates the 3,5-dimethyl-1,2-dithiolium cation, as evidenced by the observation of the (known) reduction of this cation at -0.840 V. The initial product of the reduction of [Ni( sacsac )2] is a Lewis base, and reacts with light, water, CO, CO2, CH3I and C12H25SH. These reactions have been followed by electrochemical and spectroscopic methods. They appear to be biomimetic for a number of reactions observed for nickel enzymes.
Ionic liquids are compatible with on-water catalysis
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC44150D
Abstract: A major limitation of on-water catalysis has been the need for liquid reactants to enable emulsification. We demonstrate that ionic liquids are compatible with on-water catalysis, enabling on-water catalysed reactions for otherwise unreactive solid-solid systems. The unique solvation properties of ionic liquids dramatically expands the scope of on-water catalysis.
Developments in Silica-Supported Organometallic Catalysis
Publisher: Springer Netherlands
Date: 1997
Electron Spin Resonance Studies of the One-Electron-Reduction Products of Nickel(II) 1, 3-Dithio β-Diketonate Complexes
Publisher: American Chemical Society (ACS)
Date: 1985
DOI: 10.1021/IC00197A030
Scanning and energy dispersive EXAFS studies of ethyl transmetallation in an alkene oligomerisation catalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 1996
DOI: 10.1039/CC9960000647
The Autocatalytic Isomerization of Allylbenzene by Nickel(0) Tetrakis(triethylphosphite)
Publisher: Wiley
Date: 10-07-2018
Ce-TUD-1: Synthesis, characterization, and testing of a versatile heterogeneous oxidation catalyst
Publisher: American Chemical Society (ACS)
Date: 10-01-2007
DOI: 10.1021/IE061197S
The Preparation and Characterization of Substituted Pentaphenylcyclopentadienyl Ligands, Their Precursors, and Complexes of Iron
Publisher: CSIRO Publishing
Date: 1990
DOI: 10.1071/CH9900281
Abstract: The synthesis and characterization by infrared, 1H and 13C n.m.r . and mass spectroscopy of the compounds C5Ph4(p-C6H4R)X (R = H, Me, Et, But X = OH, Br, H), C5Ph4-n(p-C6H4Me)nO (n = 1, 2, 4), C5Ph5-n(p-C6H4Me)nX (n = 2, 3 X = OH, Br) and C5Ph4(p-C6H4R)Fe(CO)2Br (R = H, Me, Et, But) are described.
Designing a Solid Catalyst for the Selective Low-Temperature Oxidation of Cyclohexane to Cyclohexanone
Publisher: Wiley
Date: 18-08-1997
The influence of ionic liquid additives on zinc half-cell electrochemical performance in zinc/bromine flow batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA03566C
Abstract: Six ionic liquids were assessed for their suitability as alternative bromine-sequestering agents (BSAs) in zinc/bromine redox flow batteries (Zn/Br RFBs) via comparison against conventional BSA, 1-ethyl-1-methylpyrrolidinium bromide ([C 2 MPyrr]Br).
4-Nitrophenol Reduction: Probing the Putative Mechanism of the Model Reaction
Publisher: American Chemical Society (ACS)
Date: 23-04-2020
Applications of 95Mo NMR. 5—substituent effects in the 95Mo and 13C NMR spectra of benzyltricarbonyl(η5‐cyclopentadienyl)molybdenum(II) derivatives
Publisher: Wiley
Date: 10-1982
Fischer-tropsch catalysts derived from surface confined [Hn FeCo3 (CO)12 ]n-1 (n = 0, 1)
Publisher: Elsevier BV
Date: 1990
Exploring Opportunities for Platinum Nanoparticles Encapsulated in Porous Liquids as Hydrogenation Catalysts
Publisher: Wiley
Date: 18-03-2020
Hydrogen from Formic Acid via Its Selective Disproportionation over Nanodomain-Modified Zeolites
Publisher: American Chemical Society (ACS)
Date: 18-06-2015
DOI: 10.1021/CS501677B
Polyhedron report number 51 Structural systematics in nickel carbonyl cluster anions
Publisher: Elsevier BV
Date: 02-0100
The chemistry of cobalt acetate: The isolation and crystal structure of the symmetric trimer, hexakis(μ-acetato)-μ3 -oxotris(pyridine)tricobalt(III) perchlorate water solvate, [Co3 O(CH3 CO2 )6 (C5 H 5 N)3 ][CIO4 ] · H2 O
Publisher: Elsevier BV
Date: 07-1996
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