苯及丙酮对磷脂酰乙醇胺液晶态结构的影响

Influence of Benzene,Acetone on the Liquid-crystal Structure of Phosphatidylethanolamine

用小角 X 射线散射(SAXS)法研究了苯、丙酮对磷脂酰乙醇胺(PE)液晶态结构的影响.实验结果表明:苯能使 PE 液晶态先从片层相解束变成立方相.然后再诱导立方相变成六角形 H_(?) 相,最后促使六角形 H_(?) 相解束变成液态.在解束相变中出现了红移现象.丙酮也有使 PE 液晶态先从片层相解束变成立方相,在解束相变中也出现红移现象,但再诱导立方相变成六角形 H_(?) 相之后,不是促使其变成液相,而是将其稳定在六角形 H_(?) 相.

The influence of benzene and acetone on the liquid-crystal structure of phosphatidylethanolamine(PE)was investigated respectively by method of the small angle X-ray scattering(SAXS).The experi-ments showed that the benzene enabled the tie of PE in liquid-crystal state to change from lamellarphase into cubic phase,then induced it from cubic phase into hexagonal phase,and finally to impel itchanging from hexagonal phase into liquid state.Meanwhile,in this phase transition of the tie removalappeared the red shift,Besides,the acetone was also capable of removing the tie of PE in liquid-crystalstate from lamellar phase into cubic phase.Again,the red shift appeared in these transitions of the tie.However,when PE in liquid crystal state was induced into hexagonal phase,the acetone was unable toimpel it from hexagonal phase into liquid phase like benzene,but stabilized it only in hexagonal phase.