Overview of Research Activities
Electron Paramagnetic Resonance (EPR) and Electron Nuclear DOuble Resonance (ENDOR) are sophisticated spectroscopic techniques which detect weak magnetic interactions between unpaired electrons and remote nuclei. The techniques find extensive use in the characterisation of structure, dynamics and spatial distribution of paramagnetic species and free radicals in chemistry, physics, biology, biochemistry, geology and medicine. The research interests of the group lie in the application of these techniques to study paramagnetic species primarily at heterogeneous oxide surfaces and in homogeneous systems, with a major emphasis in catalysis. We are specifically interested in the use of hyperfine techniques (primarily ENDOR spectroscopy), in conjunction with DFT modelling, to provide information on nuclear co-ordinates of ligand nuclei in frozen solutions and the role of weak outer sphere interactions in controlling selectivity. Highlights of relevance to this project include discrimination of diastereomers in solution, identifying the role of H-bonds in stereochemical communications, characterising the nature of coordinated radicals in homogeneous catalysts, and probing spin densities in diazabutadiene organometallic complexes. We also have a long standing interest in surface radicals and interfacial electron transfer processes in (photo)catalysis.
Some of the current research projects in the EPR/ENDOR group can be found on the following pages: