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 journalArticle

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 languageEnglish
Pages (from-to)1405-1411
Number of pages7
JournalMolecular Physics
Volume100
Issue number9
DOIs
Publication statusPublished - May 10 2002

Fingerprint

Magnetic field effects
Magnetic Fields
Chain length
methylene
Ions
life (durability)
Viologens
magnetic fields
Magnetic fields
ions
Magnets
Photolysis
Porphyrins
porphyrins
acetonitrile
flash
photolysis
Zinc
Laser pulses
electron transfer

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

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; Shimizu, Takashi; Tanimoto, Yoshifumi; Yonemura, Hiroaki; Yamada, Sunao; Ujiie, Tomomi; Nakamura, Hiroshi.

In: Molecular Physics, Vol. 100, No. 9, 10.05.2002, p. 1405-1411.

Research output: Contribution to journalArticle

Fujiwara, Yoshihisa ; Hamada, Jun ; Aoki, Takeshi ; Shimizu, Takashi ; Tanimoto, Yoshifumi ; Yonemura, Hiroaki ; Yamada, Sunao ; Ujiie, Tomomi ; Nakamura, Hiroshi. / 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. In: Molecular Physics. 2002 ; Vol. 100, No. 9. pp. 1405-1411.
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AU - Hamada, Jun

AU - Aoki, Takeshi

AU - Shimizu, Takashi

AU - Tanimoto, Yoshifumi

AU - Yonemura, Hiroaki

AU - Yamada, Sunao

AU - Ujiie, Tomomi

AU - Nakamura, Hiroshi

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