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Electron transfer reactions of singlet molecular oxygen with phenols
Author(s) -
Mártire Daniel O.,
Gonzalez Mónica C.
Publication year - 2000
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/(sici)1099-1395(200004)13:4<208::aid-poc231>3.0.co;2-s
Subject(s) - chemistry , diabatic , singlet oxygen , quenching (fluorescence) , singlet state , photochemistry , reaction rate constant , electron transfer , oxygen , ion , computational chemistry , excited state , atomic physics , kinetics , fluorescence , organic chemistry , thermodynamics , adiabatic process , physics , quantum mechanics
The correlation of the reactive component of the bimolecular quenching rate constant, k r , with Δ G for reactions of singlet molecular oxygen with phenols is interpreted in terms of classical and semiclassical theories of electron transfer. Both treatments indicate a diabatic process with a reorganization energy of about 0.46 eV. The observed diabaticity is in line with a crossing of states with different symmetry. Similar results were obtained for the reactions of singlet molecular oxygen with phenoxide ions in water. Copyright © 2000 John Wiley & Sons, Ltd.