Effect of halogen atom on electron spin polarization studied by CIDEP, using halogen substituted aromatic acyl compounds

Toshiaki Suzuki, Kiminori Maeda, Tatsuo Arai, Kimio Akiyama, Shozo Tero-Kubota

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1 Citation (Scopus)

Abstract

The reaction and spin dynamics of the photocleavage reaction of 2-chloro-2′-acetylnaphthalene were studied by time-resolved FT-EPR and transient absorption (TA) spectroscopy. The photocleavage reaction from both singlet and triplet states was observed by TA and EPR experiments, although the radical cleavage reaction in the excited triplet state is energetically unfavourable. This feature has been explained by the ionic cleavage reaction due to the electro-negativity of the chlorine atoms. The time-resolved FT-EPR spectra were similar to those observed in the bromine substituted compound, 2-BAN, reported in a previous paper. The origin of the electron spin polarization was assigned to the radical triplet pair mechanism (RTPM) and free radical pair mechanism (F-pair RPM) from analysis of the time profiles of the spin polarization.

Original languageEnglish
Pages (from-to)3341-3348
Number of pages8
JournalMolecular Physics
Volume101
Issue number22
DOIs
Publication statusPublished - 2003 Nov 20

ASJC Scopus subject areas

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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