ORCID Profile
0000-0002-5804-6322
Current Organisation
University of Wollongong
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Manufacturing Processes and Technologies (excl. Textiles) | Pyrometallurgy | Materials Engineering | Metals and Alloy Materials |
Basic Iron and Steel Products | Management of Solid Waste from Manufacturing Activities | Coated Metal and Metal-Coated Products
Publisher: International Union of Crystallography (IUCr)
Date: 09-10-2020
DOI: 10.1107/S2056989020013298
Abstract: The structure of the racemic version of the natural product Goniotamirenone C [racemic anti -6-(2-chloro-1-hydroxy-2-phenylethyl)-2 H -pyran-2-one, C 13 H 11 ClO 3 ] at 150 K is reported. The compound crystallizes with monoclinic ( P 2 1 / n ) symmetry and with Z ′ = 2. One independent molecule is ordered while the other independent molecule exhibits an interesting whole-molecule enantiomeric disorder with occupancies of 0.846 (4) and 0.154 (4). The independent molecules are hydrogen bonded with –OH...O=C linkages into chains that run parallel to the a axis. This structural analysis corrects our previous assignment as the syn isomer [Meesakul et al. (2020). Phytochemistry , 171 , 112248–112255].
Publisher: Royal Society of Chemistry (RSC)
Date: 2000
DOI: 10.1039/B007579P
Publisher: Wiley
Date: 19-01-2023
Abstract: In a recent Research Article, Ben and co‐workers reported a hydrogen‐bonded framework prepared from a 4 + tetra‐amidinium component and a 4 − tetra‐sulfonate component, termed CPOS‐6. They showed that CPOS‐6 could reversibly adsorb and desorb water over a narrow humidity window, and that this material offered potential for applications in atmospheric water harvesting. This conclusion was supported by experiments that showed the material was stable over 50 adsorption/desorption cycles and that the kinetics of these cycles were very rapid. In this Correspondence we present additional structural data regarding this framework in both its hydrated and dehydrated states and thus discern the mechanism of water binding. These data do not disagree with Ben and co‐workers’ findings: rather they emphasise how remarkable the cyclability and rapid kinetics of adsorption/desorption are, as these processes involve a complete crystal‐to‐crystal rearrangement of the framework.
Publisher: American Chemical Society (ACS)
Date: 16-06-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CE01669D
Abstract: Subtleties of interpenetration are exposed and classified in the IRMOF-9 system.
Publisher: Elsevier BV
Date: 06-2007
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B801077C
Abstract: The new click-adduct 4,5-di(2-pyridyl)-1,2,3-triazole acts as a doubly-chelating anionic bridging ligand that forms dinuclear ruthenium(II) complexes which exhibit strong metal-metal interactions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B807063F
Abstract: Two new copper metal-organic frameworks containing 5-nitro-1,3-benzenedicarboxylate (5-nbdc) have been prepared from the reaction between Cu(NO(3))(2).3H(2)O and H(2)(5-nbdc) in DMF at different temperatures. Single crystal X-ray structures of {[Cu(2)(5-nbdc)(2)(DMF)(2)].2DMF}(infinity) () and {[Cu(2)(5-nbdc)(2)(DMF)(2)].3(1/3)DMF}(infinity) () revealed similar sheet structures, containing triangular and hexagonal pores, but differences in the stacking of the sheets. Magnetic measurements on and are consistent with antiferromagnetic dimers containing a small quantity of paramagnetic impurity. The desolvated forms of and were applied as Lewis acid catalysts in the acetylation of methyl 4-hydroxybenzoate. When the reaction between Cu(NO(3))(2).3H(2)O and H(2)(5-nbdc) was carried out in a mixture of DMF and water, the reaction gave metallomacrocycles of formula [Cu(6)(5-nbdc)(6)(H(2)O)(12)(DMF)(6)] (). These assemble through hydrogen-bonding interactions to form a gross structure in which the macrocycle pores align into channels. The reaction between Cu(NO(3))(2).3H(2)O and 5-methylsulfanylmethyl-1,3-benzenedicarboxylic acid, H(2)(5-msbdc), in DMF-water gave {[Cu(2)(5-msbdc)(2)(OH(2))(2)].3DMF}(infinity) (), which contains similar sheets to those in and , whereas the reaction with 5-amino-1,3-benzenedicarboxylic acid, H(2)(5-abdc), gave {[Cu(2)(5-abdc)(2)(DMF)(2)]}(infinity) (), which has a previously reported network based on sheets containing rhombohedral pores. The reaction between Cu(NO(3))(2).3H(2)O and 2-methoxy-1,3-benzenedicarboxylic acid, H(2)(2-mbdc), in DMF gave [Cu(2)(2-mbdc)(2)(DMF)(2)] (). The presence of the substituent in the 2-position removes the co-planarity of the carboxylate groups, and the sheet structure adopted by contains rhomboidal pores.
Publisher: American Chemical Society (ACS)
Date: 24-02-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0DT00870B
Abstract: Hypervalent organoiodine( v ) zinc and zirconium metal–organic frameworks are produced post-synthetically and studied for their thermal properties and as recyclable heterogeneous reagent oxidants.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5DT00011D
Abstract: A variety of coordination materials are formed from the heteroditopic ligand 4-(3,5-dimethyl-1 H -pyrazol-4-yl)benzoate.
Publisher: Elsevier BV
Date: 06-2021
Publisher: Wiley
Date: 15-10-2008
Publisher: Elsevier BV
Date: 07-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CE00930J
Abstract: Highly porous boron-loaded MOFs with novel auto-oxidation inhibiting reactivity are achieved via post-synthetic ketone reduction and alcohol reactions with H 3 B·THF.
Publisher: American Chemical Society (ACS)
Date: 31-10-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CE01447C
Abstract: A series of MOFs containing di(4-pyridyl)-1 H -pyrazole linkers have been prepared and characterised.
Publisher: American Physical Society (APS)
Date: 11-06-2020
Publisher: Elsevier BV
Date: 03-2020
DOI: 10.1016/J.PHYTOCHEM.2019.112248
Abstract: The phytochemical investigation of the twig and leaf extracts of Goniothalamus tamirensis led to the isolation and identification of 15 compounds including three rare previously undescribed styryllactones, goniotamirenones A-C, together with 12 known compounds. (Z)-6-Styryl-5,6-dihydro-2-pyranone and 5-(1-hydroxy-3-phenyl-allyl)-dihydro-furan-2-one are reported here for the first time as previously undescribed natural products. Their structures were elucidated by spectroscopic methods. Goniotamirenone A was synthesized via a [2 + 2] cycloaddition reaction of 6-styrrylpyran-2-one in quantitative yield. The absolute configurations of goniotamirenones B and C were identified from experimental and calculated ECD data, while the absolute configurations of (-)-5-acetoxygoniothalamin, (-)-isoaltholactone, parvistone E, and 5-(1-hydroxy-3-phenyl-allyl)-dihydro-furan-2-one were identified by single-crystal X-ray diffraction analysis using Cu Kα radiation. The absolute configurations of the other related compounds were determined from comparisons of their ECD spectra with relevant compounds reported in the literature. (-)-5-Acetoxygoniothalamin exhibited potent cytotoxicity against the colon cancer cell line (HCT116) with an IC
Publisher: CSIRO Publishing
Date: 2002
DOI: 10.1071/CH02145
Abstract: Complexes of 2-(1,2,3-thiadiazol-4-yl)pyridine (3) and 2-(1,2,3-selenadiazol-4-yl)pyridine (4) with palladium(II), nickel(II), ruthenium(II), copper(II), and silver(I) reagents are reported. In general, these ligands chelate to the metal but are curiously prone to positional disorder in the X-ray crystal structures of their complexes. With silver tetrafluoroborate, ligand (3) forms an ordered M2L4 complex that contains an unsupported Ag–Ag interaction. Treatment of (4) with excess silver nitrate leads to an intriguing molecular rearrangement that produces a silver complex of 3-formyl-1,2,3-triazolo[1,5-a]pyridine.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2DT12115H
Abstract: The iron(III) and aluminium(III) complexes of 1,3-di(4-pyridyl)propane-1,3-dionato (dppd) and 1,3-di(3-pyridyl)propane-1,3-dionato (dmppd), [Fe(dppd)(3)] 1, [Fe(dmppd)(3)] 2, [Al(dppd)(3)] 3 and [Al(dmppd)(3)] 4 have been prepared. These complexes adopt molecular structures in which the metal centres contain distorted octahedral geometries. In contrast, the copper(II) and zinc(II) complexes [Cu(dppd)(2)] 5 and [Zn(dmppd)(2)] 6 both form polymeric structures in which coordination of the pyridyl groups into the axial positions of neighbouring metal centres links discrete square-planar complexes into two-dimensional networks. The europium complex [Eu(dmppd)(2)(H(2)O)(4)]Cl·2EtOH·0.5H(2)O 7 forms a structure containing discrete cations that are linked into sheets through hydrogen bonds, whereas the lanthanum complex [La(dmppd)(3)(H(2)O)]·2H(2)O 8 adopts a one-dimensional network structure, connected into sheets by hydrogen bonds. The iron complexes 1 and 2 act as metalloligands in reactions with silver(I) salts, with the nature of the product depending on the counter-ions present. Thus, the reaction between 1 and AgBF(4) gave [AgFe(dppd)(3)]BF(4)·DMSO 9, in which the silver centres link the metalloligands into discrete nanotubes, whereas reactions with AgPF(6) and AgSbF(6) gave [AgFe(dppd)(3)]PF(6)·3.28DMSO 10 and [AgFe(dppd)(3)]SbF(6)·1.25DMSO 11, in which the metalloligands are linked into sheets. In all three cases, only four of the six pyridyl groups present on the metalloligands are coordinated. The reaction between 2 and AgNO(3) gave [Ag(2)Fe(dmppd)(3)(ONO(2))]NO(3)·MeCN·CH(2)Cl(2)12. Compound 12 adopts a layer structure in which all pyridyl groups are coordinated to silver centres and, in addition, a nitrate ion bridges between two silver centres. A similar structure is adopted by [Ag(2)Fe(dmppd)(3)(O(2)CCF(3))]CF(3)CO(2)·2MeCN·0.25CH(2)Cl(2)13, with a bridging trifluoroacetate ion playing the same role as the nitrate ion in 12.
Publisher: Wiley
Date: 25-10-2023
Publisher: Elsevier BV
Date: 03-2021
Publisher: Springer Science and Business Media LLC
Date: 27-04-2022
Publisher: Elsevier BV
Date: 11-2020
Publisher: CSIRO Publishing
Date: 2019
DOI: 10.1071/CH19194
Abstract: The solvothermal reaction of 2-nitro-[1,1′‐biphenyl]‐4,4′‐dicarboxylic acid (H2bpdcNO2) with Zn(NO3)2·6H2O in DMF solvent does not give a functionalised variant of IRMOF-9. Single-crystal X-ray diffraction analysis shows the major initial product of this reaction, WUF-21 (WUF=Wollongong University Framework), is a porous interpenetrated diamondoid metal–organic framework (MOF) with a secondary building unit that ‘doubly straps’ eight bridging bpdcNO2 ligands in a distorted tetrahedral shape around an unusual pentazinc core. A second porous MOF phase (WUF-23) containing a large and novel dodecazinc secondary building unit forms in the same reaction and eventually predominates in solutions containing formate anion, which arises from the hydrolysis of DMF. Doping the starting ligand with [1,1′‐biphenyl]‐4,4′‐dicarboxylic acid (H2bpdc) provides a facile way to grow nitro-functionalised IRMOF-9, hereafter denoted as WUF-22, where the dopant is carried through into the product. Activated WUF-22 is a microporous solid with an apparent Brunauer–Emmett–Teller (BET) surface area of 2497m2g−1, which matches well with geometric surface area calculations. The CO2 adsorption properties of WUF-22 are reported.
Publisher: Wiley
Date: 15-10-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CE00861A
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B906170C
Abstract: A series of sulfur-tagged zinc MOFs containing functionalised 4,4'-biphenyldicarboxylate ligands has been prepared: oxidative post-synthetic modification with dimethyldioxirane has converted the sulfide tags into sulfones, leaving the MOF networks intact.
Publisher: Royal Society of Chemistry (RSC)
Date: 2005
DOI: 10.1039/B416553E
Abstract: Accurate, low temperature X-ray crystal structure determinations show that 3,3'-biquinoline (6), 2,2'-biquinazoline (7), 2,2'-biquinoxaline (8), 2,2'-bibenzoxazole (10) and 2,2'-bibenzothiazole (11) all exist in the solid state in centrosymmetric, planar conformations that minimise their dipole moments and maximise both conjugation between the rings and various types of attractive intermolecular associations. In contrast, 4,4'-biquinazoline (9) and 1,1'-bibenzotriazole (12) display non-planar conformations due to repulsive intramolecular interactions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3DT02040A
Abstract: The synthesis of nickel Schiff base complexes with four pendant groups, that bind to quadruplex DNA, is reported.
Publisher: American Chemical Society (ACS)
Date: 02-08-2005
DOI: 10.1021/JO0510033
Abstract: [reaction: see text] Palladium-catalyzed cross-coupling of 2-thiomethylbenzoxazoles with tri-alkylstannyl pyridines efficiently produces pyridinyl boxazomycin C analogues.
Publisher: Wiley
Date: 05-10-2022
Abstract: New heterometallic hydride complexes that involve the addition of {Mg−H} and {Zn−H} bonds to group 10 transition metals (Pd, Pt) are reported. The side‐on coordination of a single {Mg−H} to Pd forms a well‐defined σ‐complex. In contrast, addition of three {Mg−H} or {Zn−H} bonds to Pd or Pt results in the formation of planar complexes with subtly different geometries. We compare their structures through experiment (X‐ray diffraction, neutron diffraction, multinuclear NMR), computational methods (DFT, QTAIM, NCIPlot), and theoretical analysis (MO diagram, Walsh diagram). These species can be described as snapshots along a continuum of bonding between ideal trigonal planar and hexagonal planar geometries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8DT02727G
Abstract: The synthesis of two new series of nickel complexes is described, along with their ability to bind to duplex and quadruplex DNA structures.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0DT01370F
Abstract: Changing the position of pendant groups on nickel Schiff base complexes can alter their binding behaviour towards quadruplex DNA.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1SC03268B
Abstract: The Pd-catalysed asymmetric allylic alkylation (Pd-AAA) of prochiral enamide anions derived from 5 H -oxathiazole 2,2-dioxides has been developed.
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0CC00826E
Abstract: The reaction of silver(i) perchlorate with the semi-rigid ligand 1,4-bis((3,5-dimethylisoxazol-4-yl)methyl)benzene (bisox) in methanol gives a triply-interpenetrated sheet structure, but a structure containing both interpenetrated sheets and Ag(2)(bisox)(3) cages is formed on recrystallisation from acetonitrile-diethyl ether. Rearrangement of the cages into sheets occurs on heating under vacuum, a process which involves a solid state change in conformation of the bisox ligands.
Publisher: Elsevier BV
Date: 07-1998
Publisher: CSIRO Publishing
Date: 2008
DOI: 10.1071/CH08021
Abstract: Bis(2,2′-bipyridyl)ruthenium(ii) complexes of four chelating ligands that contain benzoxazole or benzothiazole rings have been prepared and characterized by NMR spectroscopy, visible absorption spectroscopy, electrochemical measurements and, in two cases, by X-ray crystallography. The incorporation of these ring systems has a marked effect on the electronic properties of the resulting complexes.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC05451H
Abstract: The first ex le of ‘one-pot’ coordinate-covalent synthetic programming for metal–organic frameworks is reported.
Publisher: Royal Society of Chemistry (RSC)
Date: 29-01-2003
DOI: 10.1039/B206990C
Publisher: American Chemical Society (ACS)
Date: 21-12-2015
Publisher: CSIRO Publishing
Date: 2002
DOI: 10.1071/CH02038
Abstract: The crystal structures of 2-cyclopropylglycinatobis(2,2�-bipyridyl)cobalt(III) diperchlorate, [Co(cpg)(2,2�- bpy)2](ClO4)2 (1), and its dihydrate [Co(cpg)(2,2�-bpy)2](ClO4)2�2H2O (2), are the first reported structures of a metal complex of 2-cyclopropylglycinate. Mixtures of the two kinds of crystals are formed from solutions that contain an excess of the Δ-R/Λ-S diastereoisomer. This diastereoisomer predominates in the solid state, but small amounts of the Δ-S/Λ-R diastereoisomer are also present, creating a disordered structure. Modelling the disorder to fit the diffraction data gives a diastereoisomeric composition of the crystals that is consistent with the nuclear magnetic resonance data.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC05715K
Abstract: Mixed donor phenanthroline-carboxylate linkers were combined with Mn II or Zn II to form photoactive MOFs with large pore apertures.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8CE01740A
Abstract: Direct radiative heating at 200 °C quantitatively converts sulfoxide-tags to desirable vinyl groups on a porous zinc( ii ) metal–organic framework analogue of IRMOF-9.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CC06241F
Abstract: Cyclopropenylmethyl sulfonamides with tethered heteroaromatics can undergo ergent gold-catalysed cyclisation reactions based on the nature of the aromatic tether.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CE00310G
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4DT02926G
Abstract: Two nickel( ii ) Schiff base complexes exhibit binding selectivity for a tetramolecular DNA quadruplex.
Publisher: Royal Society of Chemistry (RSC)
Date: 13-08-2014
DOI: 10.1039/C4CE01377H
Publisher: American Chemical Society (ACS)
Date: 27-05-2007
DOI: 10.1021/JO070191P
Publisher: Wiley
Date: 19-02-2022
Abstract: Reactive extrusion printing (REP) is demonstrated as an approach to simultaneously crystallize and deposit films of the metal–organic framework (MOF) Cu 3 btc 2 (btc=1,3,5‐benzenetricarboxylate), also known as HKUST‐1. The technique co‐delivers inks of the copper(II) acetate and H 3 btc starting materials directly on‐surface and on‐location for rapid nucleation into films at room temperature. The films were analyzed using PXRD, profilometry, SEM and thermal analysis techniques and confirmed high‐quality Cu 3 btc 2 films are produced in low‐dispersity interconnected nanoparticulate form. The porosity was examined using gas adsorption which showed REP gives Cu 3 btc 2 films with open interconnected pore structures, demonstrating the method bestows features that traditional synthesis does not. REP is a technique that opens the field to time‐efficient large‐scale fabrication of MOF interfaces and should find use in a wide variety of coating application settings.
Publisher: International Union of Crystallography (IUCr)
Date: 2021
DOI: 10.1107/S2056989020016540
Abstract: The structure of the natural product lawinal [systematic name: (−)-(2 S )-5,7-dihydroxy-6-methyl-4-oxo-2-phenylchromane-8-carbaldehyde, C 17 H 14 O 5 ] at 150 K is reported. The compound crystallizes with monoclinic ( I 2) symmetry and with Z ′ = 2. The absolute configuration could not be determined reliably from X-ray analysis only. However, our analysis returns the S -configuration at the C-2 position, consistent with previous stereochemical assignment from specific rotation. The independent molecules form into alternating hydrogen-bonded chains with C—H...O=CH intermolecular linkages that run parallel to the crystallographic a axis and are extended into the ac plane by π–π interactions between their phenyl substituents.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC10143A
Abstract: Zinc(II) nitrate reacts with different ratios of 1,4-benzenedicarboxylic acid (H(2)bdc) and 2-halo-1,4-benzenedicarboxylic acid (H(2)bdc-X, X = Br or I) to give [Zn(4)O(bdc)(3-x)(bdc-X)(x)], in which preferential incorporation of bdc is observed. The selective incorporation is related to crystal growth rates, and the proportion of incorporated bdc-X rises with increasing reaction time.
Publisher: Royal Society of Chemistry (RSC)
Date: 17-07-0007
DOI: 10.1039/B202954E
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0DT00319K
Abstract: A new nickel Schiff base complex shows selective binding behaviour towards quadruplex DNA and cytotoxicity against cancer cells.
Publisher: Elsevier BV
Date: 04-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CC09348A
Abstract: Few-layered porous boron nitride nanosheets prepared using MgB 2 as a dynamic template show good CO 2 adsorption selectivity.
Publisher: Wiley
Date: 05-10-2022
Abstract: New heterometallic hydride complexes that involve the addition of {Mg−H} and {Zn−H} bonds to group 10 transition metals (Pd, Pt) are reported. The side‐on coordination of a single {Mg−H} to Pd forms a well‐defined σ‐complex. In contrast, addition of three {Mg−H} or {Zn−H} bonds to Pd or Pt results in the formation of planar complexes with subtly different geometries. We compare their structures through experiment (X‐ray diffraction, neutron diffraction, multinuclear NMR), computational methods (DFT, QTAIM, NCIPlot), and theoretical analysis (MO diagram, Walsh diagram). These species can be described as snapshots along a continuum of bonding between ideal trigonal planar and hexagonal planar geometries.
Publisher: Wiley
Date: 17-08-2022
Abstract: As hydrogen bonded frameworks are held together by relatively weak interactions, they often form several different frameworks under slightly different synthesis conditions and respond dynamically to stimuli such as heat and vacuum. However, these dynamic restructuring processes are often poorly understood. In this work, three isoreticular hydrogen bonded organic frameworks assembled through charge‐assisted amidinium⋅⋅⋅carboxylate hydrogen bonds ( 1 C/C , 1 Si/C and 1 Si/Si ) are studied. Three distinct phases for 1 C/C and four for 1 Si/C and 1 Si/Si are fully structurally characterized. The transitions between these phases involve extreme yet recoverable molecular‐level framework reorganization. It is demonstrated that these transformations are related to water content and can be controlled by humidity, and that the non‐porous anhydrous phase of 1 C/C shows reversible water sorption through single crystal to crystal restructuring. This mechanistic insight opens the way for the future use of the inherent dynamism present in hydrogen bonded frameworks.
Publisher: Wiley
Date: 05-12-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1DT10029G
Publisher: American Chemical Society (ACS)
Date: 03-06-2021
Publisher: American Chemical Society (ACS)
Date: 21-06-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0SC04390G
Abstract: Room temperature Rh-catalysed tetradehydro-Diels–Alder reaction via an unusual Rh-stabilised allene.
Publisher: Elsevier BV
Date: 08-2007
Publisher: American Chemical Society (ACS)
Date: 23-08-2022
Abstract: The geometric and spectroscopic properties of four cationic
Publisher: American Chemical Society (ACS)
Date: 19-05-2001
DOI: 10.1021/IC0009977
Publisher: International Union of Crystallography (IUCr)
Date: 15-02-2001
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CC06775C
Abstract: A highly diastereoselective method for the synthesis of syn -β-amino alcohols and enantioenriched anti -β-amino alcohols has been developed involving α-hydroxyl aldehydes and chiral α-phenylaminoxyaldehydes or α-benzoyloxyaldehydes, respectively in Petasis borono-Mannich allylation reactions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CC01349A
Abstract: Reactive inkjet printing post-synthetically patterns MOF films rapidly and controllably.
Publisher: Wiley
Date: 19-01-2023
Abstract: In a recent Research Article, Ben and co‐workers reported a hydrogen‐bonded framework prepared from a 4 + tetra‐amidinium component and a 4 − tetra‐sulfonate component, termed CPOS‐6. They showed that CPOS‐6 could reversibly adsorb and desorb water over a narrow humidity window, and that this material offered potential for applications in atmospheric water harvesting. This conclusion was supported by experiments that showed the material was stable over 50 adsorption/desorption cycles and that the kinetics of these cycles were very rapid. In this Correspondence we present additional structural data regarding this framework in both its hydrated and dehydrated states and thus discern the mechanism of water binding. These data do not disagree with Ben and co‐workers’ findings: rather they emphasise how remarkable the cyclability and rapid kinetics of adsorption/desorption are, as these processes involve a complete crystal‐to‐crystal rearrangement of the framework.
Publisher: Elsevier BV
Date: 05-2022
Publisher: Wiley
Date: 19-02-2022
Abstract: Reactive extrusion printing (REP) is demonstrated as an approach to simultaneously crystallize and deposit films of the metal–organic framework (MOF) Cu 3 btc 2 (btc=1,3,5‐benzenetricarboxylate), also known as HKUST‐1. The technique co‐delivers inks of the copper(II) acetate and H 3 btc starting materials directly on‐surface and on‐location for rapid nucleation into films at room temperature. The films were analyzed using PXRD, profilometry, SEM and thermal analysis techniques and confirmed high‐quality Cu 3 btc 2 films are produced in low‐dispersity interconnected nanoparticulate form. The porosity was examined using gas adsorption which showed REP gives Cu 3 btc 2 films with open interconnected pore structures, demonstrating the method bestows features that traditional synthesis does not. REP is a technique that opens the field to time‐efficient large‐scale fabrication of MOF interfaces and should find use in a wide variety of coating application settings.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9SC02750E
Abstract: The reactions of a series of β-diketiminate stabilised aluminium dihydrides with ruthenium bis(phosphine), palladium bis(phosphine) and palladium cyclopentadienyl complexes is reported.
Publisher: American Chemical Society (ACS)
Date: 03-01-2022
DOI: 10.1021/ACS.INORGCHEM.1C03334
Abstract: Herein, we report coupling
Publisher: Elsevier BV
Date: 11-2011
Publisher: Georg Thieme Verlag KG
Date: 20-03-2020
Abstract: A diastereoselective palladium-catalyzed dearomative formal (4+2) cycloaddition between vinyl benzoxazinanones and 3-nitroindoles has been developed. This reaction provides a concise route to tetrahydro-5H-indolo[2,3-b]quinolines in excellent yield (up to 94%) and diastereoselectivity (up to :2), with versatile functional handles including vinyl, nitro, and free NH groups.
Publisher: American Chemical Society (ACS)
Date: 05-03-2019
DOI: 10.1021/ACS.JNATPROD.8B00581
Abstract: Four new flavonoids (1-4), a new benzyl benzoate derivative (5), five new oxepinones (6-10), and 14 known compounds (11-24) were isolated from the leaf and twig extracts of Desmos cochinchinensis. Their structures were established by spectroscopic methods. The structure of 1 was also confirmed by X-ray diffraction data. The absolute configurations of 3, 4, and 6-10 were determined from comparisons of their ECD spectra with those of relevant reported compounds. Compounds 1, 2, 6, 8, 10, 12-15, and 17 showed α-glucosidase inhibitory activities with IC
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0CC00646G
Abstract: The Group 13 metal complexes [M(L(2))(3)], where M is Al or Ga and L(2) is 1,3-di(4-pyridyl)-1,3-propanedionato, are hexatopic metalloligands that have been used to prepare mixed-metal-organic frameworks containing interpenetrated primitive cubic networks. In contrast, the europium complex [Eu(HL(2))(3)(H(2)L(2))]Cl(4) x EtOH forms a hydrogen-bonded network following partial protonation of the pyridyl groups.
Publisher: AIP Publishing
Date: 20-03-2020
DOI: 10.1063/1.5115518
Abstract: Rare earth orthoferrites demonstrate great application potentials in spintronics and optical devices due to their multiferroic and magnetooptical properties. In RFeO3, magnetic R3+ undergo a spontaneous spin reorientation in a temperature range determined by R (rare earth), where the magnetic structure changes from Γ2 to Γ4. The b-axis component of their magnetic moment, Mb, is reported in numerous neutron diffraction studies to remain zero at all temperatures. More sensitive magnetometer measurements reveal a small non-zero Mb, which is minute above ∼200 K. Mb increases with cooling and reaches values of ∼10–3 μB/f.u. at temperatures within or below the spin reorientation temperatures. Our results can be explained by assuming the Fe3+ spins as the origin of non-zero Mb, while R3+ spins suppress Mb. The representation analysis of point groups shows that non-zero Mb is associated with a small admixture of the Γ3 phase to Γ2 or Γ4. Such a mixing of the three magnetic phases requires at least a fourth order of the spin Hamiltonian for RFeO3 to describe the non-zero Mb.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2CC38176A
Abstract: Direct heating of a metal-organic framework provides a simple, controllable way of effecting a covalent post-synthetic modification. Herein we report that an allyloxy-tagged zinc metal-organic framework undergoes a thermally-promoted aromatic Claisen rearrangement through which the framework connectivity and porosity are maintained.
Publisher: Elsevier BV
Date: 04-2000
Publisher: Elsevier BV
Date: 06-2016
DOI: 10.1016/J.BIORTECH.2016.01.014
Abstract: Laccase was immobilized on granular activated carbon (GAC) and the resulting GAC-bound laccase was used to degrade four micropollutants in a packed-bed column. Compared to the free enzyme, the immobilized laccase showed high residual activities over a broad range of pH and temperature. The GAC-bound laccase efficiently removed four micropollutants, namely, sulfamethoxazole, carbamazepine, diclofenac and bisphenol A, commonly detected in raw wastewater and wastewater-impacted water sources. Mass balance analysis showed that these micropollutants were enzymatically degraded following adsorption onto GAC. Higher degradation efficiency of micropollutants by the immobilized compared to free laccase was possibly due to better electron transfer between laccase and substrate molecules once they have adsorbed onto the GAC surface. Results here highlight the complementary effects of adsorption and enzymatic degradation on micropollutant removal by GAC-bound laccase. Indeed laccase-immobilized GAC outperformed regular GAC during continuous operation of packed-bed columns over two months (a throughput of 12,000 bed volumes).
Publisher: Elsevier BV
Date: 07-2019
Publisher: Elsevier BV
Date: 06-2008
Publisher: Wiley
Date: 17-08-2023
Abstract: The crotylation reactions of chiral α‐F, α‐OBz and α‐OH aldehydes under Petasis‐borono‐Mannich conditions using ( E )‐ or ( Z )‐crotylboronates and primary amines resulted in γ‐addition products in high dr and high er. α‐F and α‐OBz aldehydes gave 1,2‐ anti ‐2,3‐ syn and 1,2‐ anti ‐2,3‐ anti , products, respectively while an α‐OH aldehyde gave 1,2‐ syn ‐2,3‐ syn products. The stereochemical outcomes of reactions of the former aldehydes can be explained using a six‐membered ring transition state (TS) model in which a Cornforth‐like conformation around the imine intermediate is favoured resulting in 1,2‐ anti products. The 2,3‐stereochemical outcome is dependent upon the geometry of the crotylboronate. These TS models were also supported by DFT calculations. The stereochemical outcomes of reactions employing an α‐OH aldehyde can be rationalised as occurring via an open‐TS involving H‐bonding in the imine intermediate between the α‐OH group and the imine N atom. Representative products were converted to highly functionalized 1,2,3,6‐tetrahydropyridines and 3 H ‐oxazolo[3,4‐ a ]pyridine‐3‐ones which will be valuable scaffolds in synthesis.
Publisher: Elsevier BV
Date: 12-2015
Publisher: Wiley
Date: 18-10-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3SC01510F
Abstract: Formation of valuable spiroheterocycles with multiple contiguous stereogenic centres from palladium-catalysed enantioselective (3 + 2) cycloaddition reactions of sulfamidate-derived azadienes and vinylcyclopropanes.
Publisher: American Chemical Society (ACS)
Date: 11-12-2018
Publisher: International Union of Crystallography (IUCr)
Date: 08-11-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1CE06044A
Start Date: 07-2021
End Date: 06-2026
Amount: $5,000,000.00
Funder: Australian Research Council
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