ORCID Profile
0000-0003-2799-903X
Current Organisation
University of New South Wales
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
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.
Macromolecular and Materials Chemistry | Synthesis of Materials | Nanochemistry and Supramolecular Chemistry | Chemical Characterisation of Materials
Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Environmentally Sustainable Manufacturing not elsewhere classified |
Publisher: Wiley
Date: 23-05-2017
Publisher: Springer Science and Business Media LLC
Date: 10-04-2017
DOI: 10.1038/NCHEM.2758
Abstract: Biomolecular receptors are able to process information by responding differentially to combinations of chemical signals. Synthetic receptors that are likewise capable of multi-stimuli response can form the basis of programmable molecular systems, wherein specific input sequences create distinct outputs. Here we report a pseudo-cuboctahedral assembly capable of cooperatively binding anionic and neutral guest species. The binding of pairs of fullerene guests was observed to effect the all-or-nothing cooperative templation of an S
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8DT01143E
Abstract: The Se-bridged P III /P V phosphazane macrocycle [{( t BuN)P V (μ-N t Bu)} 2 (μ-Se) 2 {P III (μ-N t Bu)} 2 ] 3 is obtained selectively using [Se( t BuN)P(μ-N t Bu)] 2 2− as a nucleophilic component.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0SC04352D
Abstract: An oxidation-triggered twist in its ferrocene ligands causes an Fe 4 L 6 parallelogram to release its guests and collapse into a high spin Fe 1 L 1 structure.
Publisher: American Chemical Society (ACS)
Date: 02-06-2022
DOI: 10.26434/CHEMRXIV-2022-CPG6J-V2
Abstract: Nanoparticle (NP) ripening is a process where energetically favored larger particles grow at the expense of smaller ones: while important in NP synthesis, it is often difficult to control during NP applications. Here, we unveil a new Contact-dependent, Localized Galvanic Ripening (CLGR) mechanism that enables precise control of NP ripening in solution. As neighboring silver NPs on a DNA origami template grow homogeneously to the point of making contact, the subtle size-dependent electrochemical potential differences of the NPs promote one silver shell to erode and redeposit locally onto the adjacent NP, leading to asymmetric structures. The unique on/off control through NP contact in CLGR presents a strategy to program the erosion and growth of specific NPs in a construct, which we exploit to synthesize customized heterogeneous core-shell NP structures with pre-designed plasmonic properties. CLGR is an essential phenomenon to consider for future nanodevice and nanophotonics designs.
Publisher: American Chemical Society (ACS)
Date: 23-01-2023
DOI: 10.1021/JACS.2C13232
Publisher: Wiley
Date: 06-02-2019
Abstract: The design of aqueous probes and binders for complex, biologically relevant anions presents a key challenge in supramolecular chemistry. Herein, a tetrahedral assembly with cationic faces and corners is reported that is capable of discriminating between anionic and neutral guests in water. Electrostatic repulsion between subcomponents can be overcome by the addition of an anionic template, or generating a robust covalent framework by incorporating tris(2-aminoethyl)amine (TREN). The resultant TREN-capped, water-soluble, fluorescent cage binds mono- and poly-phosphoric esters, including nucleotides. Its covalent skeleton renders it stable at micromolar concentrations in water, enabling the fluorometric detection of biologically relevant guests in an aqueous environment. Selective supramolecular encapsulants, such as 1, could enable new sensing applications, such as recognition of toxins and drugs, under biological conditions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NJ01401D
Abstract: The electrochemical, optical and magnetic properties of a sulfate-bridged high spin Co( ii ) dimer, [Co 2 (DMIM) 4 (μ 2 -O 2 ,O,O′-SO 4 ) 2 ]·2MeCN are reported. Antiferromagnetic coupling across the μ 2 -(O 2 -sulfato) bridging mode has been identified with J = −28 cm −1 .
Publisher: American Chemical Society (ACS)
Date: 05-01-2019
DOI: 10.1021/JACS.8B12323
Abstract: Herein we elucidate the interplay of chiral, chelate, solvent, and hydrogen-bonding information in the self-assembly of a series of new three-dimensional metal-organic architectures. Enantiopure ligands, each containing H-bond donors and acceptors, form different structures, depending on the ratio in which they are combined: enantiopure components form M
Publisher: American Chemical Society (ACS)
Date: 28-06-2022
DOI: 10.1021/JACS.2C03506
Abstract: The self-assembly of block copolymers is often rationalized by structure and microphase separation pathways that erge from this parameter space may provide new mechanisms of polymer assembly. Here, we show that the sequence and length of single-stranded DNA directly influence the self-assembly of sequence-defined DNA block copolymers. While increasing the length of DNA led to predictable changes in self-assembly, changing only the sequence of DNA produced three distinct structures: spherical micelles (spherical nucleic acids, SNAs) from flexible poly(thymine) DNA, fibers from semirigid mixed-sequence DNA, and networked superstructures from rigid poly(adenine) DNA. The secondary structure of poly(adenine) DNA strands drives a temperature-dependent polymerization and assembly mechanism: copolymers stored in an SNA reservoir form fibers after thermal activation, which then aggregate upon cooling to form interwoven networks. DNA is often used as a programming code that aids in nanostructure addressability and function. Here, we show that the inherent physical and chemical properties of single-stranded DNA sequences also make them an ideal material to direct self-assembled morphologies and select for new methods of supramolecular polymerization.
Publisher: American Chemical Society (ACS)
Date: 28-04-2022
DOI: 10.26434/CHEMRXIV-2022-CPG6J
Abstract: Nanoparticle (NP) ripening is a process where energetically favored larger 8 particles grow at the expense of smaller ones: while important in NP synthesis, it is often difficult to control during NP applications. Here, we unveil a new Contact-dependent, Localized Galvanic Ripening (CLGR) mechanism that enables precise control of NP ripening in solution. As neighboring silver NPs on a DNA origami template grow homogeneously to the point of making contact, the subtle size-dependent electrochemical potential differences of the NPs promote one silver shell to erode and redeposit locally onto the adjacent NP, leading to asymmetric structures. The unique on/off control through NP contact in CLGR presents a strategy to program the erosion and growth of specific NPs in a construct, which we exploit to synthesize customized heterogeneous core-shell NP structures with pre-designed plasmonic properties. CLGR is an essential phenomenon to consider for future nanodevice and nanophotonics designs.
Publisher: Wiley
Date: 27-02-2019
Publisher: Wiley
Date: 27-06-2019
Abstract: Modern supramolecular chemistry is overwhelmingly based on non-covalent interactions involving organic architectures. However, the question of what happens when you depart from this area to the supramolecular chemistry of structures based on non-carbon frameworks remains largely unanswered, and is an area that potentially provides new directions in molecular activation, host-guest chemistry, and biomimetic chemistry. In this work, we explore the unusual host-guest chemistry of the pentameric macrocycle [{P(μ-N
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9CS00776H
Abstract: In this tutorial review, we explore the suite of single-molecule techniques currently available to probe DNA nanostructures and highlight the relationship between single-molecule method development and DNA nanotechology.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6NJ02802K
Abstract: A new electroactive bridging ligand based on the donor (triarylamine) and acceptor (thiazolothiazole) units has been designed and incorporated into a diruthenium complex.
Publisher: American Chemical Society (ACS)
Date: 10-04-2020
DOI: 10.1021/JACS.0C02444
Publisher: Wiley
Date: 30-10-2023
Publisher: Springer Science and Business Media LLC
Date: 13-07-2020
Publisher: American Chemical Society (ACS)
Date: 26-12-2019
DOI: 10.1021/JACS.9B11347
Abstract: Anion binding by receptor molecules is a central field of modern chemistry which impacts areas of catalysis as well as biological and materials chemistry. As binding often requires high chemical stability under aerobic and aqueous conditions for practical applications, carbon-based anion receptors have dominated this field, with main group element analogues receiving far less attention. The recent observation that the air- and moisture-stable amino-cyclophosph(V)azanes of the type [RN(E)P(μ-NR)]
Publisher: American Chemical Society (ACS)
Date: 05-05-2022
DOI: 10.1021/JACS.2C02261
Publisher: Wiley
Date: 24-10-2014
Abstract: A ligand containing the thiazolo[5,4-d]thiazole (TzTz) core (acceptor) with terminal triarylamine moieties (donors), N,N'-(thiazolo[5,4-d]thiazole-2,5-diylbis(4,1-phenylene))bis(N-(pyridine-4-yl)pyridin-4-amine (1), was designed as a donor-acceptor system for incorporation into electronically active metal-organic frameworks (MOFs). The capacity for the ligand to undergo multiple sequential oxidation and reduction processes was examined using UV/Vis-near-infrared spectroelectrochemistry (UV/Vis-NIR SEC) in combination with DFT calculations. The delocalized nature of the highest occupied molecular orbital (HOMO) was found to inhibit charge-transfer interactions between the terminal triarylamine moieties upon oxidation, whereas radical species localized on the TzTz core were formed upon reduction. Conversion of 1 to diamagnetic 2+ and 4+ species resulted in marked changes in the emission spectra. Incorporation of this highly delocalized multi-electron donor-acceptor ligand into a new two-dimensional MOF, [Zn(NO3 )2 (1)] (2), resulted in an inhibition of the oxidation processes, but retention of the reduction capability of 1. Changes in the electrochemistry of 1 upon integration into 2 are broadly consistent with the geometric and electronic constraints enforced by ligation.
Publisher: Wiley
Date: 27-04-2018
Abstract: Although a multitude of studies have explored the coordination chemistry of classical tripodal ligands containing a range of main-group bridgehead atoms or groups, it is not clear how periodic trends affect ligand character and reactivity within a single ligand family. A case in point is the extensive family of neutral tris-2-pyridyl ligands E(2-py)
Publisher: American Chemical Society (ACS)
Date: 12-05-2019
DOI: 10.1021/JACS.9B03776
Abstract: The cavities of artificial receptors are defined by how their components fit together. The encapsulation of specific molecules can thus be engineered by considering geometric principles however, intermolecular interactions and steric fit scale with receptor size, such that the ability to bind multiple guests from a specific class of compounds remains a current challenge. By employing metal-organic self-assembly, we have prepared a triangular prism from two different ligands that is capable of binding more than 20 different natural products, drugs, and steroid derivatives within its prolate cavity. Encapsulation inflates the host, enhancing its ability to bind other guests in peripheral pockets and thus enabling our system to bind combinations of different drug and natural product cargoes in different locations simultaneously. This new mode of entropically favorable self-assembly thus enables central encapsulation to lify guest-binding events around the periphery of an artificial receptor.
Publisher: Wiley
Date: 05-02-2019
Publisher: Springer Science and Business Media LLC
Date: 09-08-2021
Publisher: Wiley
Date: 30-10-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2NR06185F
Abstract: Combining experimental and computational design, the length and flexibility of wireframe DNA nanotubes are modulated with minimal design alterations.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1SC04793K
Abstract: An extended, multivalent DNA nanotweezer that undergoes large-scale molecular motion upon protein recognition is presented. Our method based on “printing-elongation-folding” combines the DNA-minimal aspect of DNA tile-based assembly, with complexity of DNA origami.
Publisher: Springer Science and Business Media LLC
Date: 21-03-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP00081E
Abstract: Redox reactions on electroactive donor–acceptor polymers can be used to tune their response to external magnetic and electrical stimuli.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7SC04927G
Abstract: Molecules often mix in unexpected ways – we present a new method of calculating product distributions in complex sorting systems.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3PY00731F
Abstract: In this paper, we describe the precise synthesis of poly(phosphodiesters) with up to four monomers. These self-assemble into various nanostructures where a single monomer difference drastically impacts the structure's size and morphology.
Publisher: Wiley
Date: 28-01-2020
Abstract: The double crossover junction (DX) is a fundamental building block for generating complex and varied structures from DNA. However, its implementation in functional devices is limited to the inherent properties of DNA itself. Here, we developed design strategies to generate the first metal-DX DNA tiles (DX
Publisher: Wiley
Date: 23-05-2017
Abstract: Self-assembled materials can be designed to express useful optoelectronic properties however, achieving structural control is a necessary precondition for the optimization of desired properties. Here we report a simple, metal-templated polymerization process that generates helical metallopolymer strands over 75 repeat units long (28 kDa) from a single bifunctional monomer and Cu
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT03074F
Abstract: The unsymmetrical P III /P V cyclodiphosphazane [(S)(H)P(μ-N t Bu) 2 PNH t Bu] provides entry into the mixed chalgogenide dianion [(S)P(μ-N t Bu) 2 P(Se)N t Bu] 2− , and unique insight into the mechanisms of cis / trans isomerism in phosph( iii )- and phosph( v )-azanes.
Publisher: American Chemical Society (ACS)
Date: 28-04-2022
DOI: 10.26434/CHEMRXIV-2022-1R7RM
Abstract: The self-assembly of block copolymers is often rationalized by structure and microphase separation pathways that erge from this parameter space may provide new mechanisms of polymer self-assembly. Here, we show that the sequence and length of single-stranded DNA directly influence the self-assembly of sequence-defined DNA block copolymers. While increasing the length of DNA led to predictable changes in self-assembly, changing only the sequence of DNA produced three distinct structures: spherical micelles (spherical nucleic acids, SNAs) from flexible poly(thymine) DNA, fibers from semi-rigid mixed-sequence DNA, and networked superstructures from rigid poly(adenine) DNA. The secondary structure of poly(adenine) DNA strands drives a temperature-dependent polymerization and assembly mechanism: copolymers stored in an SNA reservoir form fibers after thermal activation, which then aggregate upon cooling to form interwoven networks. DNA is often used as a programming code that aids in nanostructure addressability and function Here, we show that the inherent physical and chemical properties of single-stranded DNA sequences also make them an ideal material to direct self-assembled morphologies and select for new methods of supramolecular polymerization.
Publisher: Wiley
Date: 28-01-2020
Publisher: Elsevier BV
Date: 07-2020
Publisher: American Chemical Society (ACS)
Date: 29-08-2023
DOI: 10.1021/JACS.3C01409
Publisher: Wiley
Date: 20-05-2016
Publisher: American Chemical Society (ACS)
Date: 02-06-2016
DOI: 10.1021/JACS.6B03858
Abstract: Zinc(II), a dimolybdenum(II) paddlewheel tetramine A, and 2-formylpyridine self-assembled to generate a cubic Zn(II)8(L(A))6 assembly. The paddlewheel faces of this assembly exhibited two distinct conformations, whereas the analogous Fe(II)8(L(A))6 framework displayed no such perturbation to its structure. This variation in behavior is attributed to the subtle difference in ligand rotational freedom between the Zn(II)- and Fe(II)-cornered cubes. The incorporation of a fluorinated Mo(II)2 paddlewheel, B, into analogous Zn(II)8(L(B))6 and Fe(II)8(L(B))6 structures resulted in changes to the rotational dynamics of the ligands. These differing dynamics perturbed the energies of the frontier orbitals of these structures, as determined through spectroscopic and electrochemical methods. The result of these perturbations was an inversion of the halide binding preference of the Zn(II)8(L(B))6 host as compared to its Zn(II)8(L(A))6 congener, whereas the Fe(II)8(L(B))6 host maintained a similar binding hierarchy to Fe(II)8(L(A))6.
Publisher: Wiley
Date: 26-02-2019
Publisher: American Chemical Society (ACS)
Date: 02-08-2017
DOI: 10.1021/JACS.7B05788
Abstract: A porphyrin-edged metal-organic tetrahedron forms host-guest complexes containing 1-4 equiv of fullerene C
Publisher: American Chemical Society (ACS)
Date: 16-08-2018
DOI: 10.1021/JACS.8B07494
Abstract: We present a method for the directed self-assembly of interlocked structures and coordination complexes in a set of metal-organic hosts. New homo- and heteroleptic metal complexes-species that cannot be prepared outside-form within the cavities of cuboctahedral coordination cages. When linear bidentate guests and macrocycles are sequentially introduced to the host, a rotaxane is threaded internally the resulting ternary host-guest complex is a new kind of molecular gyroscope. Tetradentate guests segregate the cavities of these cages into distinct spaces, promoting new stoichiometries and modes of ligand binding to metal ions. The behaviors of bound complexes were observed to alter markedly as a result of confinement: In situ oxidations and spin transitions, neither of which occur ex situ, were both observed to proceed. By providing a tailored space for new modes of coordination-driven self-assembly, the inner phases of cuboctahedral coordination cages provide a new medium for synthetic coordination chemistry.
Publisher: Wiley
Date: 20-04-2016
Publisher: Wiley
Date: 04-01-2018
Abstract: Oxidation of the P
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR03212F
Abstract: We present a new strategy to achieve chiral induction and redox switching along the backbone of metallohelicate architectures, wherein a DNA duplex directs the handedness and charge transport properties of a metal–organic assembly more than 60 bonds away (a distance of nm).
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 2019
End Date: 2020
Funder: Natural Sciences and Engineering Research Council
View Funded ActivityStart Date: 2018
End Date: 2019
Funder: Natural Sciences and Engineering Research Council
View Funded ActivityStart Date: 2022
End Date: 2024
Funder: Australian Research Council
View Funded ActivityStart Date: 02-2022
End Date: 01-2025
Amount: $420,000.00
Funder: Australian Research Council
View Funded Activity