Time-resolved and Fourier transform EPR studies of type I photochemical reaction. Direct determination of kinetic parameters of C-C bond cleavage

K. Akiyama, S. Tero-Kubota

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2 Citations (Scopus)

Abstract

Continuous wave time-resolved EPR (CW-TREPR) and pulsed Fourier transform EPR (FT-EPR) experiments with a resolution of ∼10 ns were carried out to investigate the Type I photocleavage. A two-pulse echo detection method was used to eliminate the dead-time problem in the FID measurements. An analysis of the buildup kinetics of the FT-EPR signal intensity due to t-butyl radicals provided the rates of the α-cleavage of t-butylphenyl ketone at various temperatures. We obtained two kinetic parameters at low and high temperatures which correspond to the non-radiative decay rate of the excited triplet state of the ketone and the rate of the Type I photocleavage, respectively.

Original languageEnglish
Pages (from-to)103-113
Number of pages11
JournalResearch on Chemical Intermediates
Volume22
Issue number2
DOIs
Publication statusPublished - 1996 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)

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