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

doi:10.1016/0009-2614(96)00759-2

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

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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 language	English
Pages (from-to)	361-367
Number of pages	7
Journal	Chemical Physics Letters
Volume	259
Issue number	3-4
DOIs	https://doi.org/10.1016/0009-2614(96)00759-2
Publication status	Published - Sept 6 1996

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/0009-2614(96)00759-2

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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

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, vol. 259, no. 3-4, pp. 361-367. https://doi.org/10.1016/0009-2614(96)00759-2

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

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.",

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

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doi = "10.1016/0009-2614(96)00759-2",

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T1 - Effect of high magnetic fields on the reverse electron transfer process in an α-cyclodextrin inclusion complex of phenothiazine-viologen chain-linked compound

AU - Fujiwara, Yoshihisa

AU - Aoki, Takeshi

AU - Yoda, Kohji

AU - Cao, Hong

AU - Mukai, Masahiro

AU - Haino, Takeharu

AU - Fukazawa, Yoshimasa

AU - Tanimoto, Yoshifumi

AU - Yonemura, Hiroaki

AU - Matsuo, Taku

AU - Okazaki, Masaharu

PY - 1996/9/6

Y1 - 1996/9/6

N2 - 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.

AB - 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.

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

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