Mechanistic Studies on Biologically Active Iron Chelators. The need for orally effective drugs as alternatives to invasive treatment regimens such as subcutaneous infusion is an ongoing concern in health care. This is particularly true in people suffering iron overload. In many cases this condition is present at birth and thus the administration of vital iron chelation therapy via the oral route is a much preferred option. We have unearthed a novel series of candidates for iron chelation therapy ....Mechanistic Studies on Biologically Active Iron Chelators. The need for orally effective drugs as alternatives to invasive treatment regimens such as subcutaneous infusion is an ongoing concern in health care. This is particularly true in people suffering iron overload. In many cases this condition is present at birth and thus the administration of vital iron chelation therapy via the oral route is a much preferred option. We have unearthed a novel series of candidates for iron chelation therapy (the pyridine-2-carboxaldehyde isonicotinoyl hydrazone [PCIH] analogues) which show oral activity. These chelators undergo some interesting iron catalysed oxidation chemistry and it is vital that the mechanism of this reaction be elucidated to determine whether it will be of biological significance upon administration of these compounds as iron chelators.Read moreRead less
Development of metal probes for the selective recognition of DNA. Transition metal complexes with large aromatic ligands have recently been shown to bind DNA by intercalation. However, controversy continues over their base sequence and groove selectivity. We will synthesise a range of chiral metal complexes and screen these against combinatorial oligonucleotide libraries to determine their base sequence selectivity. The information obtained will help us design better intercalators that can be us ....Development of metal probes for the selective recognition of DNA. Transition metal complexes with large aromatic ligands have recently been shown to bind DNA by intercalation. However, controversy continues over their base sequence and groove selectivity. We will synthesise a range of chiral metal complexes and screen these against combinatorial oligonucleotide libraries to determine their base sequence selectivity. The information obtained will help us design better intercalators that can be used as sensitive molecular probes and may find application as antitumour drugs. Binding interaction between the complex and DNA will be studied by NMR spectroscopy.Read moreRead less
New Synthetic Routes to the Immobilisation of Mixed Valence Transition Metal Complexes on Conducting Metal Oxides. Highly coloured, electrochemically active transition metal dyes may find application electrochromic devices, where they may switch between contrasting coloured forms through a simple redox reaction. A prerequisite is that the dye be immobilised onto a solid conducting support whilst preserving the electrochemical and optical properties of the dye found in solution. This project tack ....New Synthetic Routes to the Immobilisation of Mixed Valence Transition Metal Complexes on Conducting Metal Oxides. Highly coloured, electrochemically active transition metal dyes may find application electrochromic devices, where they may switch between contrasting coloured forms through a simple redox reaction. A prerequisite is that the dye be immobilised onto a solid conducting support whilst preserving the electrochemical and optical properties of the dye found in solution. This project tackles this problem through a combination of organic and inorganic synthesis to develop new electrochromic dyes that may be attached to mesoporous titania.Read moreRead less
Nanostructures of Titanium Dioxide and Titanates by Wet-chemistry. One-dimensional (1D) nanoparticulates of titanium dioxide (TiO2) and titanate synthesized by wet-chemistry approaches are new advanced materials of unusual properties. This project will investigate the formation and phase transition mechanism of these 1D particulates by various techniques. With such knowledge, we can effectively control the morphology on a scale of nanometers, and tailor the energy gap of these materials. This wi ....Nanostructures of Titanium Dioxide and Titanates by Wet-chemistry. One-dimensional (1D) nanoparticulates of titanium dioxide (TiO2) and titanate synthesized by wet-chemistry approaches are new advanced materials of unusual properties. This project will investigate the formation and phase transition mechanism of these 1D particulates by various techniques. With such knowledge, we can effectively control the morphology on a scale of nanometers, and tailor the energy gap of these materials. This will significantly influence the photosemiconductive photocatalytic and lithium ions insertion behaviours of the particles so that advanced materials for solar energy conversion, photocatalysts for decomposing organic pollutants in environment, eletrode materials of lithium batteries can be developed.Read moreRead less
Structure of Adsorbed Surfactant Layers at Ionic Liquid-Air Interfaces. The research conducted in the project will greatly enhance our understanding of the physical properties of ionic liquids, an important new class of designer solvents. Australian researchers will receive advanced training and experience using Sum Frequency Spectroscopy in the laboratory of OI Rutland, and in the use of Neutron Reflection. This project is especially timely with the imminent start-up of the new Australian resea ....Structure of Adsorbed Surfactant Layers at Ionic Liquid-Air Interfaces. The research conducted in the project will greatly enhance our understanding of the physical properties of ionic liquids, an important new class of designer solvents. Australian researchers will receive advanced training and experience using Sum Frequency Spectroscopy in the laboratory of OI Rutland, and in the use of Neutron Reflection. This project is especially timely with the imminent start-up of the new Australian research reactor, OPAL, and will help to seed an active program by Australian researchers at this facility.Read moreRead less
Ditopic receptors for the cooperative binding of cations and anions. This project is concerned with the design, synthesis and investigation of new receptor molecules that are capable of simultaneously binding metal cations and anions in a cooperative fashion. The new systems are based on a macrocyclic platform which acts as the metal binding site together with side-arms incorporating functional groups that are designed to cooperatively interact with a suitable anion. Potential applications exist ....Ditopic receptors for the cooperative binding of cations and anions. This project is concerned with the design, synthesis and investigation of new receptor molecules that are capable of simultaneously binding metal cations and anions in a cooperative fashion. The new systems are based on a macrocyclic platform which acts as the metal binding site together with side-arms incorporating functional groups that are designed to cooperatively interact with a suitable anion. Potential applications exist for this category of ditopic receptors in mineral processing where the ability to extract a metal as its metal salt may lead to more efficient solvent extraction processes.Read moreRead less
TiO2 nanoparticle design and photocatalysis applications. The aim is to design nanosized TiO2 photocatalsysts with superior photoactivity using various synthesis paths. Nanosized TiO2 particles will be prepared using sol-gel, aerosol and plasma processing, their physical and chemical properties will be closely studied and their photocatalytic ability will be assessed. Such tailor-made photocatalysts have significant commercial potential value, as they would be highly suitable for the photooxidat ....TiO2 nanoparticle design and photocatalysis applications. The aim is to design nanosized TiO2 photocatalsysts with superior photoactivity using various synthesis paths. Nanosized TiO2 particles will be prepared using sol-gel, aerosol and plasma processing, their physical and chemical properties will be closely studied and their photocatalytic ability will be assessed. Such tailor-made photocatalysts have significant commercial potential value, as they would be highly suitable for the photooxidation of organic compounds and the photoreduction of metal ions in wastewaters. Findings from this work will pave the way for a "green" technology such as photocatalysis to become more efficient and hence a competitive alternative to conventional water treatment methods.Read moreRead less
Cooperativity in Spin Crossover Systems: Memory, Magnetism and Microporosity. Spin-crossover centres are a well known form of inorganic electronic switch for which variation of temperature, pressure and irradiation leads to a change in d-electron configuration and therefore changes to structure, colour and magnetism. Here we aim to synthesise and study a wide variety of new spin-crossover systems where cooperativitiy between centres, induced by careful supramolecular design, will lead to molecul ....Cooperativity in Spin Crossover Systems: Memory, Magnetism and Microporosity. Spin-crossover centres are a well known form of inorganic electronic switch for which variation of temperature, pressure and irradiation leads to a change in d-electron configuration and therefore changes to structure, colour and magnetism. Here we aim to synthesise and study a wide variety of new spin-crossover systems where cooperativitiy between centres, induced by careful supramolecular design, will lead to molecules and materials having memory retention, magnetic ordering and/or microporosity. The significance of these aims covers several fundamental questions in the science of electronic systems. We also identify a number of potential nanochemical switching applications for the unique systems proposed.Read moreRead less
Polynuclear Spin-Crossover Molecular Switches: Host-Guest Chemistry, Magnetism and Memory. The generation of advanced nanomaterials requires both a control of nanoscale structure and the incorporation of specific properties into that structure. This project will lead to significant new developments in this area, with the assembly of complex molecular systems containing electronic switches. The unique combination of nanoscale switching and guest-binding and/or magnetic ordering in these systems ....Polynuclear Spin-Crossover Molecular Switches: Host-Guest Chemistry, Magnetism and Memory. The generation of advanced nanomaterials requires both a control of nanoscale structure and the incorporation of specific properties into that structure. This project will lead to significant new developments in this area, with the assembly of complex molecular systems containing electronic switches. The unique combination of nanoscale switching and guest-binding and/or magnetic ordering in these systems will lead to entirely new materials properties, leading in turn to fundamental advances in the science of molecular electronics and nanomaterials. Benefits of the research are wide-ranging, and include the development of innovative new technologies for molecular sensing, molecular separations, data storage and visual displays.Read moreRead less
Inkjet printing bio-functional materials. The proposed research will benefit existing biomedical industries in Australia and provide opportunities for new start-up companies, as well as potentially attracting biomedical industries from overseas to establish a presence in Australia. This exciting area of research will provide an excellent multidisciplinary research environment for the proposed ARC International Fellow. The new bio-inkjet printing equipment, materials and configurations developed ....Inkjet printing bio-functional materials. The proposed research will benefit existing biomedical industries in Australia and provide opportunities for new start-up companies, as well as potentially attracting biomedical industries from overseas to establish a presence in Australia. This exciting area of research will provide an excellent multidisciplinary research environment for the proposed ARC International Fellow. The new bio-inkjet printing equipment, materials and configurations developed here may also have impact on other areas of Bionics, including the development of the next generation Bionic Ear, conduits for spinal cord regeneration as well as for muscle regeneration.Read moreRead less