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A radiolabelling study of radicals derived from benzene, toluene and benzaldehyde sorbed in model environmental carbon
Ist Teil von
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2002-04, Vol.58 (6), p.1209-1217
Ort / Verlag
England: Elsevier B.V
Erscheinungsjahr
2002
Link zum Volltext
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
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.