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

    研究成果: Contribution to journalArticle査読

    47 被引用数 (Scopus)

    抄録

    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.

    本文言語英語
    ページ(範囲)361-367
    ページ数7
    ジャーナルChemical Physics Letters
    259
    3-4
    DOI
    出版ステータス出版済み - 9 6 1996

    All Science Journal Classification (ASJC) codes

    • 物理学および天文学(全般)
    • 物理化学および理論化学

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