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Photodissociation dynamics of benzoic acid
Author(s) -
Yuri A. Dyakov,
Arnab Bagchi,
Yuan T. Lee,
ChiKung Ni
Publication year - 2010
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.3274624
Subject(s) - photodissociation , dissociation (chemistry) , benzoic acid , ion , chemistry , translational energy , ab initio , ab initio quantum chemistry methods , branching fraction , potential energy , photochemistry , atomic physics , molecule , physics , organic chemistry
The photodissociation of benzoic acid at 193 and 248 nm was investigated using multimass ion imaging techniques. Three dissociation channels were observed at 193 nm: (1) C(6)H(5)COOH-->C(6)H(5)+COOH, (2) C(6)H(5)COOH-->C(6)H(5)CO+OH, and (3) C(6)H(5)COOH-->C(6)H(6)+CO(2). Only channels, (2) and (3), were observed at 248 nm. Comparisons of the ion intensities and photofragment translational energy distributions with the potential energies obtained from ab initio calculations and the branching ratios obtained from the Rice-Ramsperger-Kassel-Marcus theory suggest that the dissociation occurs on many electronic states.

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