Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (05): 577-579.doi: 10.3866/PKU.WHXB19920501

• Communication •     Next Articles

The Influence of Aggregation of Bilayer Membrane Containing Schiff Base Moiety Upon the Fluorescence Efficiency

Wu Li-Xin; Tian Yong-Chi; Liang Ying-Qiu   

  1. Institute of Theoretical Chemistry, Jilin University, Changchun 130023; Department of Chemistry, Nanjing University, Nanjing 210008
  • Received:1992-03-18 Revised:1992-04-27 Published:1992-10-15
  • Contact: Wu Li-Xin

Abstract: Single chain amphiphiles containing Schiff base chromophore can organize into bilayer membrane as vesicles in aqueous solution. The fluorescence excitation and emission intensities of Schiff base group are markdly influenced by the phase states of the bilayer membrane. At T<30 ℃, fluorescence intensities decrease slightly, but dras-tically between 30—40 ℃ and between 45—55 ℃, just corresponding to the phase tran-sition temperatures 37 ℃ and 46 ℃ respectively, given by DSC. So the tight arrange-ment in molecules greatly enhances the lumination efficiency. According to the aggregate states, the fluorescence emission intensity follows the series as: I(gel state)>I(liquid state)>I(molecular dispersion state).

Key words: Fluorescence, Bilayer membrane, Schiff base, Phase transition