Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (03): 304-306.doi: 10.3866/PKU.WHXB19920305

• Communication • Previous Articles     Next Articles

pH Dependence of the Aggregation of a Bilayer Membrane Containing Schiff Base Moiety

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:1992-01-25 Revised:1992-03-04 Published:1992-06-15
  • Contact: Tian Yong-Chi

Abstract: The pH dependence of ultraviolet absorption spectra of an aqueous bilayer membrane composed of single-chain ammonium amphiphile containing a Schiff base, has been studied at 10 and 35 ℃, which are below and above the liquid crystalline to gel phase transition (T_c=32 ℃) of the neutral solution, respectively. At 10 ℃, increasing acidity of the solution facilitates the formation of H-aggregate. At 10 ℃, the H-aggregate increases with the decrease of pH value in the range of pH 13.0-10.0. Further increase of acididy leads to the protonation of the Schiff base and thus partially disintegrates the aggregate.

Key words: Schiff base, Synthetic bilayer membrane, Aggregation, Electronic spectra