影像科学与光化学 ›› 1991, Vol. 9 ›› Issue (1): 62-66.DOI: 10.7517/j.issn.1674-0475.1991.01.62

• 研究简报 • 上一篇    下一篇

无色孔雀绿光氧化反应的途径

刘奎文, 陈尚贤   

  1. 中国科学院感光化学研究所, 北京 100101
  • 收稿日期:1989-05-03 修回日期:1990-04-13 出版日期:1991-02-20 发布日期:1991-02-20
  • 通讯作者: 刘奎文
  • 基金资助:
    北京分子动态及稳态结构开放实验室资助课题

PATHWAYS OF PHOTOOXIDATION REACTION OF LEUCO MALACHITE GREEN

LIU KUI-WEN, CHEN SHANG-XIAN   

  1. Institute of Chemistry, Acadetnia Sintca, Beijing 100080, P.R. China
  • Received:1989-05-03 Revised:1990-04-13 Online:1991-02-20 Published:1991-02-20

摘要: 前一篇文章已说明,无色孔雀绿(LMG)经光氧化生成孔雀绿(MG+)染料是一个复杂的光化学过程。萘加入反应溶液猝灭了LMG的激发态,但却使反应速率升高。对这一实验结果我们曾推断为:可能是由于萘与LMG之间发生了电子转移作用。本文将对这一推断作进一步实验论证,并将说明在没有电子受体参加时,LMG的光氧化主要通过其激发三线态途径进行。已得到的实验结果证明,我们的上述推断是正确的,现予以报道。

关键词: 无色孔雀绿, 萘, 吲哚, 激基复合物, 荧光和磷光

Abstract: The photooxidation reaction of leuco malachite green (LMG) was studied. As naphthalene was added into solution of LMG in dioxane, an emission spectrum of the exciplex formed between excited LMG and naphthalene was determined. When indole was put in solution of LMG in acetonitrile, the fluorescence of LMG did not change, but its phosphorescence was quenched by indole, and photochemical reaction rate of LMG was decreased simultaneously. It is concluded that in the absence of an electron acceptor the triplet of LMG plays an important role in the photochemical reaction.

Key words: leucobase of malachite green, naphthalene, indole, exciplex, fluorescence and phosphorescence