Effect of high magnetic fields on the reverse electron transfer process in an α-cyclodextrin inclusion complex of phenothiazine-viologen chain-linked compound

Yoshihisa Fujiwara, Takeshi Aoki, Kohji Yoda, Hong Cao, Masahiro Mukai, Takeharu Haino, Yoshimasa Fukazawa, Yoshifumi Tanimoto, Hiroaki Yonemura, Taku Matsuo, Masaharu Okazaki

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The effect of high magnetic fields (< 14 T) on the lifetime of a triplet biradical generated by a photoinduced intramolecular electron transfer reaction of the title compound has been studied in water at room temperature by using pulse-magnet laser flash photolysis apparatus. On increasing the magnetic field from zero to ca. 1 T, the lifetime of the biradical increases steeply, and then decreases gradually in higher magnetic fields. The lifetime at ca. 13 T is about 30% of that at 1 T. This drastic reversal of the effect is qualitatively interpreted by a spin-lattice relaxation (SLR) mechanism. The SLR induced by the anisotropic Zeeman interaction is responsible for the decrease in lifetime in the higher magnetic fields. The mechanism is discussed in detail based on model calculations.

Original languageEnglish
Pages (from-to)361-367
Number of pages7
JournalChemical Physics Letters
Volume259
Issue number3-4
DOIs
Publication statusPublished - Sep 6 1996

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Effect of high magnetic fields on the reverse electron transfer process in an α-cyclodextrin inclusion complex of phenothiazine-viologen chain-linked compound'. Together they form a unique fingerprint.

  • Cite this

    Fujiwara, Y., Aoki, T., Yoda, K., Cao, H., Mukai, M., Haino, T., Fukazawa, Y., Tanimoto, Y., Yonemura, H., Matsuo, T., & Okazaki, M. (1996). Effect of high magnetic fields on the reverse electron transfer process in an α-cyclodextrin inclusion complex of phenothiazine-viologen chain-linked compound. Chemical Physics Letters, 259(3-4), 361-367. https://doi.org/10.1016/0009-2614(96)00759-2