Chain length dependence of high magnetic field effects on lifetimes of radical ion pairs linked by a methylene chain: Interpretation by both spin-lattice and spin-spin relaxations

Yoshihisa Fujiwara; Jun Hamada; Takeshi Aoki; Takashi Shimizu; Yoshifumi Tanimoto; Hiroaki Yonemura; Sunao Yamada; Tomomi Ujiie; Hiroshi Nakamura

doi:10.1080/00268970110117935

Chain length dependence of high magnetic field effects on lifetimes of radical ion pairs linked by a methylene chain: Interpretation by both spin-lattice and spin-spin relaxations

Yoshihisa Fujiwara, Jun Hamada, Takeshi Aoki, Takashi Shimizu, Yoshifumi Tanimoto, Hiroaki Yonemura, Sunao Yamada, Tomomi Ujiie, Hiroshi Nakamura

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

High magnetic field dependence of lifetimes of methylene-chain-linked radical ion pairs (RIPs) generated by photo-induced electron transfer from zinc(II) porphyrin to viologen has been confirmed in aqueous acetonitrile using a pulse magnet-laser flash photolysis apparatus. In the case of a short methylene chain it was first revealed that the dependence was definitely different from that for a long one, and was characterized by a reversal in the dependence. In addition to a long lifetime independent of the magnetic field, RIP in fields above 7 T exhibited short lifetimes that depended on the field. These results were interpreted not only by spin-lattice (longitudinal) relaxation but also by spin-spin (transverse) relaxation in RIPs.

Original language	English
Pages (from-to)	1405-1411
Number of pages	7
Journal	Molecular Physics
Volume	100
Issue number	9
DOIs	https://doi.org/10.1080/00268970110117935
Publication status	Published - May 10 2002

All Science Journal Classification (ASJC) codes

Biophysics
Molecular Biology
Condensed Matter Physics
Physical and Theoretical Chemistry

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10.1080/00268970110117935

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Fujiwara, Y., Hamada, J., Aoki, T., Shimizu, T., Tanimoto, Y., Yonemura, H., Yamada, S., Ujiie, T., & Nakamura, H. (2002). Chain length dependence of high magnetic field effects on lifetimes of radical ion pairs linked by a methylene chain: Interpretation by both spin-lattice and spin-spin relaxations. Molecular Physics, 100(9), 1405-1411. https://doi.org/10.1080/00268970110117935

Chain length dependence of high magnetic field effects on lifetimes of radical ion pairs linked by a methylene chain: Interpretation by both spin-lattice and spin-spin relaxations. / Fujiwara, Yoshihisa; Hamada, Jun; Aoki, Takeshi et al.
In: Molecular Physics, Vol. 100, No. 9, 10.05.2002, p. 1405-1411.

Research output: Contribution to journal › Article › peer-review

Fujiwara, Y, Hamada, J, Aoki, T, Shimizu, T, Tanimoto, Y, Yonemura, H, Yamada, S, Ujiie, T & Nakamura, H 2002, 'Chain length dependence of high magnetic field effects on lifetimes of radical ion pairs linked by a methylene chain: Interpretation by both spin-lattice and spin-spin relaxations', Molecular Physics, vol. 100, no. 9, pp. 1405-1411. https://doi.org/10.1080/00268970110117935

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abstract = "High magnetic field dependence of lifetimes of methylene-chain-linked radical ion pairs (RIPs) generated by photo-induced electron transfer from zinc(II) porphyrin to viologen has been confirmed in aqueous acetonitrile using a pulse magnet-laser flash photolysis apparatus. In the case of a short methylene chain it was first revealed that the dependence was definitely different from that for a long one, and was characterized by a reversal in the dependence. In addition to a long lifetime independent of the magnetic field, RIP in fields above 7 T exhibited short lifetimes that depended on the field. These results were interpreted not only by spin-lattice (longitudinal) relaxation but also by spin-spin (transverse) relaxation in RIPs.",

author = "Yoshihisa Fujiwara and Jun Hamada and Takeshi Aoki and Takashi Shimizu and Yoshifumi Tanimoto and Hiroaki Yonemura and Sunao Yamada and Tomomi Ujiie and Hiroshi Nakamura",

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AU - Fujiwara, Yoshihisa

AU - Hamada, Jun

AU - Aoki, Takeshi

AU - Shimizu, Takashi

AU - Tanimoto, Yoshifumi

AU - Yonemura, Hiroaki

AU - Yamada, Sunao

AU - Ujiie, Tomomi

AU - Nakamura, Hiroshi

PY - 2002/5/10

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AB - High magnetic field dependence of lifetimes of methylene-chain-linked radical ion pairs (RIPs) generated by photo-induced electron transfer from zinc(II) porphyrin to viologen has been confirmed in aqueous acetonitrile using a pulse magnet-laser flash photolysis apparatus. In the case of a short methylene chain it was first revealed that the dependence was definitely different from that for a long one, and was characterized by a reversal in the dependence. In addition to a long lifetime independent of the magnetic field, RIP in fields above 7 T exhibited short lifetimes that depended on the field. These results were interpreted not only by spin-lattice (longitudinal) relaxation but also by spin-spin (transverse) relaxation in RIPs.

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Chain length dependence of high magnetic field effects on lifetimes of radical ion pairs linked by a methylene chain: Interpretation by both spin-lattice and spin-spin relaxations

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