个人简介

Education: B.Sc., University of Auckland; B.Sc. (Hon.), Ph.D., La Trobe University, Post-docs: Oxford, ANU

研究领域

Analytical Chemistry and Electrochemistry

The research in the analytical chemistry group follows two main themes. One area is the electrochemical behavior of small organic and inorganic molecules; especially those involved in biological redox processes, such as vitamins and coenzymes (see reactions below for vitamin E). The group is currently developing methods for initiating and studying electrochemical reactions that occur within artificial lipid bilayer membranes. The aim of the research is to develop electrochemical sensors that can be used for monitoring biological reactions in vivo. The research covers many areas of chemistry including analytical, physical, biological and synthetic (organic and inorganic). The second area of research is in atmospheric chemistry. The group is interested in monitoring atmospheric pollutants and in establishing procedures for optimising the detection of toxic materials present in the atmosphere and natural water samples. The pollutants are released during slash-and-burn deforestation in neighbouring Indonesia and from local heavy industries in Singapore. The group has established outside testing stations for collecting particulate material that is analysed by inductively coupled plasma optical emission spectroscopy. Gaseous samples are collected using thermal desorption tubes and analysed with gas chromatography.

近期论文

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Luo, D.; Lee, S.; Zheng, B.; Sun, Z.; Huang, K.-W.; Furukawa, K.; Kim, D.; Webster, R. D.; Wu, J., Indolo[2,3-b]carbazoles with Tunable Ground States: How Clar's Aromatic Sextet Determines The Singlet Biradical Character. Chem. Sci. (2014), 5(12), 4944–4952. Du, Y.; Wang, Y.; Li, X.; Shao, Y.; Li, G.; Webster, R. D.; Chi, Y. R., N-Heterocyclic Carbene Organocatalytic Reductive β, β-Coupling Reactions of Nitroalkenes via Radical Intermediates. Org. Lett. (2014), 16(21), 5678–5681. Chanthapally, A.; Yang, H.; Quah, H. S.; Webster, R. D.; Schreyer, M. K.; Ming Wah Wong, M. W.; Vittal, J. J., Oxygen-Initiated Stereoselective Thermal Isomerization of a Cyclobutane Derivative in the Solid State. Chem. Eur. J. (2014), 20(48), 15702–15708. Moo, J. G. S.; Khezri, B.; Webster, R. D.; Pumera, M., Graphene oxides prepared by Hummer's, Hoffmann's and Staudenmaier's method shows dramatic influences on heavy metal ion adsorption. ChemPhysChem (2014), 15(14), 2922–2929. Chan, K. K.; Ganguly, R.; Li, Y.; Webster, R. D., Electrochemically Controlled One-Electron Oxidation Coupled to Consecutive Hydrogen Atom Transfer of Caffeine. ChemElectroChem (2014), 1(9), 1557–1562. Chan, Y. Y.; Webster, R. D., Voltammetric Studies on Vitamins D2 and D3 in Organic Solvents. Electrochim. Acta (2014), 138, 400–409. Tan, Y. S..; Urbančok, D.; Webster, R. D., Contrasting Voltammetric Behavior of Different forms of Vitamin A in Aprotic Organic Solvents. J. Phys. Chem. B (2014), 118(29), 8591–8600. Zeng, Z.; Lee, S.; Zafra, J. L.; Ishida, M.; Bao, N.; Webster, R. D.; López Navarrete, J. T.; Ding, J.; Casado, J.; Kim, D.; Wu, J., Turning On the Biradical State of Tetracyano- Perylene and Quaterrylenequinodimethanes by Incorporation of Additional Thiophene Rings, Chem. Sci. (2014), 5(8), 3072–3080. He, J.; Ji, W.; Yao, L.; Wang, Y.; Khezri, B.; Webster, R. D.; Chen, H., Strategy for Nano-Catalysis in a Fixed-Bed System. Adv.Mater. (2014), 26(24), 4151–4155. Xu, X.; Webster, R. D, Primary Coloured Electrochromism of Aromatic Oxygen and Sulfur Diesters. RSC Advances (2014), 4(35), 18100–18107. Poon, K. C.; Tan, D. C. L.; Vo, T. D. T.; Khezri, B.; Su, H.; Webster, R. D.; Sato, H., Newly Developed Stepwise Electroless Deposition Enables a Remarkably Facile Synthesis of Highly Active and Stable Amorphous Pd Nanoparticle Electrocatalysts for Oxygen Reduction Reaction. J. Am. Chem. Soc. (2014), 136(14), 5217–5220. Zhang, J.; She, Q.; Chang, V. W. C.; Tang, C. Y.; Webster, R. D., Mining Nutrients (N, K, P) from Urban Source-Separated Urine by Forward Osmosis Dewatering. Environ. Sci. Technol. (2014), 48(6), 3386–3394. Tan, S. M.; Ambrosi, A.; Khezri, B.; Webster, R. D.; Pumera, M., Towards electrochemical purification of chemically reduced graphene oxide from redox accessible impurities. Phys. Chem. Chem. Phys. (2014), 16(15) 7058–7065. Li, Y.; Huang, K.-W.; Sun, Z.; Webster, R. D.; Zeng, Z.; Zeng, W.; Chi, C.; Furukawa, K.; Wu, J., A kinetically blocked 1,14:11,12-dibenzopentacene: A persistent triplet diradical of non-Kekulé polycyclic benzenoid hydrocarbons. Chem. Sci. (2014), 5(5), 1908–1914. Xiao, Y.; Fan, R.; Zhang, L.; Yue, J.; Webster, R. D.; Lim, T.-T., Photodegradation of iodinated trihalomethanes in aqueous solution by UV 254 irradiation. Water Res. (2014), 49, 275–285. Lauw, S. J. L.; Ganguly, R.; Webster, R. D., The Electrochemical Reduction of Biotin (Vitamin B7) and Conversion into its Ester. Electrochimica Acta (2013), 114, 514–520. Tan, S. L. J.; Kan, J. M.; Webster, R. D., Differences in Proton-Coupled Electron Transfer Reactions of Flavin Mononucleotide (FMN) and Flavin Adenine Dinucleotide (FAD) between Buffered and Unbuffered Aqueous Solutions. J. Phys. Chem. B (2013), 117(44), 13755–13766. Chan, Y. Y.; Yue, Y; Li, Y.; Webster, R. D., Electrochemical/Chemical Oxidation of Bisphenol A in a Four-Electron/Two-Proton Process in Aprotic Organic Solvents. Electrochimica Acta (2013), 112, 287–294. Ambrosi, A.; Wong, G. K. S.; Webster, R. D.; Sofer, Z.; Pumera, M., Carcinogenic Organic Residual Compounds Reabsorbed on Thermally Reduced Graphene Materials are Released at Low Temperature. Chem. Eur. J. (2013), 19(43), 14446–14450. Fang, Z.; Webster, R. D.; Samoc, M.; Lai, Y.-H., Tuning Two-Photon Absorption Cross Sections for Triphenylamine Triads. RSC Adv. (2013), 3(39), 17914–17917.