A radiolabelling study of radicals derived from benzene, toluene and benzaldehyde sorbed in model environmental carbon.
Radiolabelled free radicals were formed by the addition of muonium--a radioactive hydrogen atom with a positive muon as its nucleus--to benzene, toluene and benzaldehyde, as sorbed in porous carbon. The activation parameters associated with their reorientational motion were measured using longitudinal-field muon spin relaxation (LF-MuSRx). Two distinct sorbed fractions were detected in each sample, characterised by molecular reorientational activation energies of 5.9/25.8 kJ/mol for benzene, 2.5/5.9 kJ/mol for toluene and 2.9/11.5 kJ/mol for benzaldehyde.
Rhodes
Christopher J
CJ
School of Pharmacy and Chemistry, Liverpool John Moores University, UK. c.j.rhodes@livjm.ac.uk
Reid
Ivan D
ID
D001547:Benzaldehydes / Q000737:chemistry*; D001554:Benzene / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D013696:Temperature; D013816:Thermodynamics; D014050:Toluene / Q000737:chemistry*
D001547:Benzaldehydes; D014050:Toluene; D002244:Carbon; D001554:Benzene; C032175:benzaldehyde