Magnetic field effects on the triplet exciplex dynamics in the duroquinone-N,N-dimethylaniline derivative systems

Shinya Sasaki, Yasuhiro Kobori, Kimio Akiyama, Shozo Tero-Kubota

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Magnetic field effects (MFEs) on the radical yield in the photoinduced electron transfer reaction from the p-halogen derivatives (4XDMA) of N,N-dimethylaniline to the excited triplet state of duroquinone (DQ) have been investigated in alcoholic solutions at room temperature. In 1-propanol and 1-butanol solutions, the radical yields decreased as the magnetic field increased and became nearly constant at 1-1.8 T in the DQ-4BrDMA and DQ-4IDMA systems, suggesting that the spin-orbit coupling interaction due to the heavy atoms governs the radical yield. On the other hand, in the methanol solution MFE due to a radical pair mechanism was observed. We concluded that the key intermediate to determine the radical yield is the triplet exciplex or contact radical ion pair in the 1-propanol and 1-butanol solutions, while it is the solvent-separated radical ion pair in the methanol solution.

Original languageEnglish
Pages (from-to)155-164
Number of pages10
JournalResearch on Chemical Intermediates
Volume27
Issue number1-2
DOIs
Publication statusPublished - 2001 May 17

ASJC Scopus subject areas

  • Chemistry(all)

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