Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (08): 677-683.doi: 10.3866/PKU.WHXB19960802

• ARTICLE • Previous Articles     Next Articles

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

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