高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (4): 618.

• 论文 • 上一篇    下一篇

以激基缔合物为中间体的对-N,N-二甲氨苯乙烯和蒽乙烯的光环加成反应

高颖1, 陆天虹2   

  1. 1. 哈尔滨师范大学化学系, 哈尔滨 150080;
    2. 中国科学院长春应用化学研究所
  • 收稿日期:1995-04-20 出版日期:1996-04-24 发布日期:1996-04-24
  • 通讯作者: 陆天虹
  • 作者简介:高颖,女,29岁,硕士,讲师.

The Exciplex as an Intermediate for Photocycloaddition of 9-Vinyl Anthracene and p-N,N-Dimethylamino Styrene

GAO Ying1, LU Tian-Hong2   

  1. 1. Department of Chemistry, Harbin Normal University, Harbin 150080;
    2. Changchun Insitute of Applied Chemistry, Chinese Academy of Sciences
  • Received:1995-04-20 Online:1996-04-24 Published:1996-04-24

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摘要： 研究了对-N,N-二甲氨苯乙烯和蒽乙烯生成的激基缔合物在不同极性溶剂中的荧光特性,发现其荧光发射波长随溶剂的极性增大向长波方向移动,且发现激基缔合物荧光量子产率的大小决定对-N,N-二甲氨苯乙烯和蒽乙烯的光环加成产物的产率。其中反式产物的相对产率随溶液极性增大而降低,并进一步探讨了此光环加成反应的机理。

关键词: 激基缔合物, 光环加成, 蒽乙烯

Abstract: The appearence of the new fluorescence peak at about 570 nm demonstratesexciplex formation between the singlet states of 9-vinyl anthracene and p-H, M-dimethy-lamino stytene.With increasing the polarity of solvents, the red-shift of the emission wavelength occurs and the fluorescence quantum yield of the exciplex decreases.For example,thefluorescence peak is at 550 nm in totuene and at 595 nm in butanone.The fluorescence qua-tum yields in totuene and in butanone are 0.053 and 0 respectively.Both the relative yield ofthe photocycloaddition dimer and the ratio of the relative yields of the trans and cis dimers decrease with increasing the polarity of solvents.For example,the relative yields of the dimerare 1.0 in totuene and 0.04 in butanone respectively.The ratio of the relative yields of transand cis dimers are 0.54 and 0 in totuene and butanones, respectively.In addition, the exciplex intermediate mechanism was suggested for the photocycloaddition between 9-vinyl anthracene and 9-N,N-dimethylamino styrene.

Key words: Exciplex, Photocycloaddition, 9-Vinyl anthracene

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