Muonium addition to DMPO and PBN sorbed in silica-gel.
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.
School of Pharmacy and Chemistry, Liverpool John Moores University, Byrom St, Liverpool, UK L3 3AF. c.j.rhodes@livjm.ac.uk
Christopher J
CJ
Rhodes
Ivan D
ID
Reid
Ulrich
U
Zimmermann