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Muonium addition to DMPO and PBN sorbed in silica-gel
Christopher J Rhodes1, Ivan D Reid, Ulrich Zimmermann
1School of Pharmacy and Chemistry, Liverpool John Moores University, Byrom St, Liverpool, UK L3 3AF. c.j.rhodes@livjm.ac.uk
Chemical Communications (Cambridge, England)
|July 19, 2002
Abstract:
Nitroxyl radicals were formed by adding the light hydrogen isotope, muonium to the spin traps DMPO (5,5-dimethyl-1-pyrroline-N-oxide) and PBN (N-tert-butyl-alpha-phenylnitrone) sorbed as 30 wt% ethanol solutions in silica-gel; evidence is presented for a specific hydrogen-bonded interaction between the DMPO adduct and the silica surface; longitudinal-field muon spin relaxation measurements (LF-MuSRx) were performed which identified two distinct motional regimes in both samples.