个人简介

M.A. - Oxford University D.Phil. - Oxford University

研究领域

Physical Chemistry

Physical Chemistry Muonium Chemistry and its applications to H atom kinetics, organic free radicals and chemistry in supercritical water Muonium (Mu) is the exotic atom consisting of a single electron and a positive muon. From a chemical point of view, muonium is a light isotope of hydrogen; its mass is 1/9 that of H. Our experimental program is conducted at the TRIUMF accelerator facility (see also SFU TRIUMF), one of the few places in the world where high intensity muon beams are available. The muon lifetime is short (2.2 μs), and measurements involve particle physics, fast electronics and computers. However, the experimental techniques muon spin rotation (μSR), muon level-crossing resonance (μLCR) and rf-μSR, all have close parallels in conventional magnetic resonance (NMR and ESR). Our research group is a multi-disciplinary team engaged in the application of these spectroscopic methods to problems of chemical interest. These include: H atom kinetics in superheated water, of relevance to development of a supercritical-water-cooled nuclear power reactor; Free radical chemistry of organic molecules containing low-valent main-group elements; Structure and dynamics of free radicals ranging from methyl to Mu adducts of fullerenes and polyaromatic hydrocarbons; Free radical chemistry of clathrate hydrates.

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Mozafari, M., J.-C. Brodovitch, L. Chandrasena and P.W. Percival (2016).Characterization of Free Radicals in Clathrate Hydrates of Furan, 2,3-Dihydrofuran, and 2,5-Dihydrofuran by Muon Spin SpectroscopyJ. Phys. Chem A., 120, 8521–8528. K. Samedov, R. West, P.W. Percival, J.-C. Brodovitch, L. Chandrasena, M. Mozafari, R. Tacke, K. Junold, C. Kobelt, P.P. Samuel, R. Azhakar, K.C. Mondal, H.W. Roesky, M. Driess and W. Wang, (2015).Free radicals of N-donor stabilized silicon(II) compounds probed by muon spin spectroscopyOrganometallics., 34, 3532–3537. Brodovitch, J.-C., B. Addison-Jones, K. Ghandi, I. McKenzie and P.W. Percival (2015).Proton, Muon and 13C Hyperfine coupling constants of C60X and C70X (X=H, Mu).Phys. Chem. Chem. Phys., 17, 1755–1762. West, R., K. Samedov, P.W. Percival, (2014).Silicon meets cyclotron: Muon spin resonance of organosilicon radicals.Chem. Eur. J., 20, 9184–9190. Alcorn, C., K. Ghandi, P.W. Percival, J.-C. Brodovitch, M. Smith and A. Kennedy, (2014).Kinetics of the Reaction between H• and Superheated Water Probed with Muonium.Chem. Phys., 435, 29–39. Percival, P.W., M. Mozafari, J.C. Brodovitch, L. Chandrasena. (2014).Organic free radicals in clathrate hydrates investigated by muon spin spectroscopy.J. Phys. Chem A., 118, 1162–1167. West, R., K. Samedov, A. Mitra, J.-C. Brodovitch, G. Langille, P.W. Percival, B.M. McCollum, T. Iwamoto, S. Ishida, C. Jones, J. Li. (2014).Germanium-centred free radicals studied by muon spin spectroscopy.Can. J. Chem., 92, 508–513. Percival, P.W., B.M. McCollum, J.-C. Brodovitch, M. Driess, A. Mitra, M. Mozafari,R. West, Y. Xiong and S. Yao (2012).Dual Reactivity of a Stable Zwitterionic N-Heterocyclic Silylene and its Carbene Complex Probed with Muonium. Organometallics, 31, 2709–2714. Percival, P.W., J.-C. Brodovitch, M. Mozafari, A. Mitra, R. West, R.S. Ghadwal, R. Azhakar, and H.W. Roesky (2011).Free Radical Reactivity of Mono- and Dichlorosilylene with MuoniumChem. Eur. J., 17, 11970-11973. West, R., and P.W. Percival (2010).Organosilicon compounds meet subatomic physics: Muon spin resonance.Dalton Transactions, 39, 9209-9216. Mitra, A., J.-C. Brodovitch, C. Krempner, P.W. Percival, P. Vyas and R. West (2010).A Silyl Radical formed by Muonium Addition to a Silylene.Angewandte Chemie, 49, 2893-2895. McCollum, B.M., J.-C. Brodovitch, J.A.C. Clyburne, P.W. Percival and R. West (2009).Detection of a secondary muoniated radical.Physica B, 404, 940-942. Brodovitch, J.-C., B.M. McCollum and P.W. Percival (2009).Kinetics of Mu addition to acetone in sub and supercritical water.Physica B, 404, 950-952. McCollum, B.M., J.-C. Brodovitch, J.A.C. Clyburne, P.W. Percival, A. Tomasik and R. West (2009).Reaction of Stable N-Heterocyclic Silylenes and Germylenes with Muonium.Chem. Eur. J., 15, 8409-8412. McCollum, B.M., T. Abe, J.-C. Brodovitch, J.A.C. Clyburne, T. Iwamoto, M. Kira, P.W. Percival and R. West (2008).Probing the reactivity of a stable silene using muonium.Angewandte Chemie. 47, 9772-9774. I. McKenzie, J.-C. Brodovitch, K. Ghandi, B. McCollum, and P.W. Percival (2007).Hyperfine Coupling in Methyl Radical Isotopomers.J. Phys. Chem. A, 111, 10625-10634. Percival, P.W., J.-C. Brodovitch, K. Ghandi, B. McCollum and I. McKenzie (2007).H atom kinetics in superheated water studied by muon spin spectroscopy.Rad. Phys. Chem., 76, 1231-1235. Brodovitch, J.C., K. Ghandi, I. McKenzie, P.W. Percival and J. Schüth (2006).Free radicals formed by H(Mu) addition to triphenylene and dodecahydrotriphenylene.Physica B, 310-313. McKenzie, I., J.-C. Brodovitch, K. Ghandi and P.W. Percival (2006).Muoniated acyl and thioacyl radicals.Physica B, 299-302. Paul W. Percival, Jean-Claude Brodovitch, Khashayar Ghandi, Brett M. McCollum, and Iain McKenzie (2005).Organic Free Radicals in Superheated Water Studied by Muon Spin Spectroscopy.J. Am. Chem. Soc., 127, 13714-13719.