含Schiff碱基囊泡双分子膜的聚集结构与相变

研究表面活性剂分子在水溶液中的聚集行为对模拟生物膜功能和研究分子间相互作用具有重要意义"'．用于形成囊泡双分子层的表面活性剂主要是类似天然磷脂的双烷基链两亲分子,单烷基链两亲分子在引人刚性基团时亦可形成双分子膜k'．含SChiff碱基两亲分子在水溶液中的聚集性质及间、尾链长度对SChiff碱基构象的影响已有报道"'．本文报道了这类分子的另一种重要成膜性质,即改变制备条件,可选择性地得到不同聚集结构和相变温度的双分子膜·实验中所用成膜分子为：CH。（CH。）。;OPh-N-CH－PhO（CH;）n;N"（CH。）。Br－（m-4;n-…

Aggregate Structure and Phase Transition of Schiff Base Containing Vesicle Bilayer

Aggregate structure, phase transition and their relationship to the preparation conditions of single chain Schiff base containing ammonium amphiphiles with different alkyl chains in aqueous vesicle bilayer were studied with differential scanning calorimetry, X-ray diffraction and electronic absorption spectrum. The experimental results showed that the bilayer structure existed in aqueous solution was affected by the length of tall alkyl chain. The amphiphile with a dodecyloxy tail could form both paralell and interdigitated structures. By controlling the preparation condition one of these two stacking form could be obtained as the main structure.