影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (1): 19-24.DOI: 10.7517/j.issn.1674-0475.1997.01.19

• 研究论文 • 上一篇    下一篇

反-1,2-双[2-(5-取代苯基噁唑基)]乙烯的结构与光性能及光二聚反应机理的研究

张文勤1, 王明真2   

  1. 1. 天津大学化学系, 天津300072;
    2. 南开大学化学系, 天津300071
  • 收稿日期:1996-04-02 修回日期:1996-07-29 出版日期:1997-02-20 发布日期:1997-02-20
  • 通讯作者: 张文勤
  • 基金资助:
    国家自然科学基金

STUDIES ON THE OPTICAL PROPERTIES AND PHOTODIMERIZATION REACTION MECHANISM OF TRANS-1,2-BIS[2-(5-SUBSTITUED PHENYLOXAZOLYL)]ETHENE

ZHANG Wenqin1, WANG Mingzhen2   

  1. 1. Department of Chemistry, Tianjin University, Tianjin 300072, P. R. China;
    2. Department of Chemistry, Nankai University, Tianjin 300071, P. R. China
  • Received:1996-04-02 Revised:1996-07-29 Online:1997-02-20 Published:1997-02-20

摘要: 测试了反-1,2-双[2-(5-苯基 唑基)]乙烯(POEOP)类化合物在1,4-二氧六环中的荧光寿命及其在不同溶剂中的光二聚量子产率,计算了其荧光辐射速率常数和非辐射速率常数,研究了取代基效应及溶剂性质对该类化合物光二聚反应的影响。结果发现,溶剂的极性增加有利于光二聚反应,但重原子溶剂对光二聚反应不利,表明该类化合物经单重态历程进行光二聚.

关键词: 噁唑, 辐射寿命, 光二聚反应

Abstract: The radiative lifetimes and photodimerization quantum yields of trans-1,2-bis[2-(5-phenyloxazolyl)]ethene(POEOP) and its derivatives were measured in different solvents. Their fluorescence and nonradiative rate constants were calculated. The substituent effects and solvent properties on the photodimerization reaction were discussed. It is found that increasing the polarity of solvent is advantageous to the photodimerization reaction but it is disadvantageous in heavy atom solvent, which means that the dimerization occurs by a singlet mechanism.

Key words: oxazole, fluorescence lifetime, photodimerization reaction