影像科学与光化学 ›› 2000, Vol. 18 ›› Issue (1): 51-57.DOI: 10.7517/j.issn.1674-0475.2000.01.51

• 研究论文 • 上一篇    下一篇

多足开链化合物的分子内光诱导电子转移及pH对其荧光的影响

解宏智, 伊珊, 吴世康   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1999-04-20 修回日期:1999-06-07 出版日期:2000-02-20 发布日期:2000-02-20
  • 通讯作者: 吴世康
  • 基金资助:
    国家自然科学基金资助项目(项目编号:29733100)

THE INTRAMOLECULAR PHOTOINDUCED ELECTRON TRANSFER OF MULTI PODAL OPEN CHAIN COMPOUNDS AND EFFECT OF pH VALUES ON THEIR FLUORESCENCE

XIE Hongzhi, YI Shan, WU Shikang   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:1999-04-20 Revised:1999-06-07 Online:2000-02-20 Published:2000-02-20

摘要: 本文合成了含有1~3个萘基取代的脲类柔性开链化合物.通过对该类化合物在溶液中的光物理行为以及受溶液酸度影响的比较研究,发现多足化合物的发光性质强烈地依赖于化合物本身存在的构象形式;同时观察到以叔胺为骨架的三足化合物存在分子内光诱导电子转移反应(PET),且这一过程强烈地依赖于介质的pH值;而叔胺基的氮原子质子化将会减弱这一PET过程.

关键词: 多足化合物, 荧光光谱, 分子内光诱导电子转移, pH效应

Abstract: A kind of open chain compounds, containing tri-, di- or mono-naphthylurea substituted amines, were synthesized in this work. It is found that the photophysical behaviors of these compounds in DMF solution strongly depend on the structure and the fluorescence intensity of tripodal compound if affected by the acidity of solution. In the same time, apparent intramolecular photoinduced electron transfer(PET) of the tripodal compound with a tertiary amine group was found, resulting in self-quenching of excited state of this compound. Furthermore, this process can be well reduced by protonation of nitrogen of the tertiary amine group of tripodal compound.

Key words: multi-podal compounds, fluorescence spectra, intramolecular photoinduced electron transfer, pH effect