物理化学学报 >> 1996, Vol. 12 >> Issue (08): 677-683.doi: 10.3866/PKU.WHXB19960802

研究论文 上一篇    下一篇

α、ω-双香豆素长链化合物激基缔合物的研究

刘天军,吴世康   

  1. 中国科学院感光化学研究所,北京 100101
  • 收稿日期:1995-10-09 修回日期:1996-04-30 发布日期:1996-08-15
  • 通讯作者: 吴世康

Study on the Excimer Fluorescence Behavior of α、ω-Biscoumarin Long Chain Compounds

Liu Tian-Jun,Wu Shi-Kang   

  1. Institute of Photographic Chemistry,Academia Sinica,Beijing 100101
  • Received:1995-10-09 Revised:1996-04-30 Published:1996-08-15
  • Contact: Wu Shi-Kang

摘要:

通过α、ω-双香豆素长链化合物详细研究了香豆素激基缔合物的荧光行为. 通过吸收光谱、荧光光谱和激发光谱,考察了香豆素激基缔合物的发光位置与激发波长,借助单光子技术确定了形成的是分子内的激基缔合物,通过1H NMR谱研究了不同双香豆素长链化合物的构象分布,揭示了在水溶液中由于疏水相互作用促进了长链化合物分子内激基缔合物的形成.

关键词: 香豆素, 长链化合物, 激基缔合物

Abstract:

The fluorescence behavior of coumarin excimer formed form the excited α, ω-biscoumarin long chain compounds in different conditions has been investigated in this paper. The fluorescence spectra show its emission maximum wave-length at 450nm in aqueous solution, and the single photon counting technique indicates its lifetime around 5.0ns. The 1H NMR spectra demonstrate the reason of the excimer formation to be the hydrophobic interaction which enhances the intramolecular aggregation of coumarin located at the terminal of molecule.

Key words: Coumarin, Long chain compound, Excimer