Stilbene Dimer Radical Cations in the Radiolyses of Stilbenes and 1,2,3,4-Tetraphenylcyclobutanes

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著者

    • TOJO Sachiko
    • The Institute of Scientific and Industrial Research, Osaka University
    • ISHIDA Akito
    • The Institute of Scientific and Industrial Research, Osaka University
    • MAJIMA Tetsuro
    • The Institute of Scientific and Industrial Research, Osaka University
    • TAKAMUKU Setsuo
    • The Institute of Scientific and Industrial Research, Osaka University

抄録

The reaction of the stilbene radical cation formed by pulse radiolysis or <i>γ</i>-radiolyses is explained based on neutralization as well as the formation of a π-type stilbene dimer radical cation (π-St<sub>2</sub><sup>+•</sup>), converting to the <i>σ</i>-type St<sub>2</sub><sup>+•</sup> (<i>σ</i>-St<sub>2</sub><sup>+•</sup>). The r-1,c-2,t-3,t-4-tetraphenylcyclobutane radical cation generated in a rigid matrix at 77 K which converted to <i>σ</i>-St<sub>2</sub><sup>+•</sup> upon warming. Both r-1,c-2,t-3,t-4- and r-1,t-2,c-3,t-4-tetraphenylcyclobutane radical cations underwent photochemical cycloreversion to π-St<sub>2</sub><sup>+•</sup> upon irradiation at wavelengths longer than 390 nm at 77 K, and converted to <i>σ</i>-St<sub>2</sub><sup>+•</sup> upon warming. It is suggested that π-St<sub>2</sub><sup>+•</sup> has overlapping arrangements of π-electrons, while <i>σ</i>-St<sub>2</sub><sup>+•</sup> has radical and cation centers on the 1- and 4-positions of the C<sub>4</sub> linkage.

収録刊行物

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 68(3), 958-966, 1995-03-15

    The Chemical Society of Japan

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各種コード

  • NII論文ID(NAID)
    10008887999
  • NII書誌ID(NCID)
    AA00580132
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00092673
  • データ提供元
    CJP書誌  J-STAGE 
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