小角X射线散射法研究CH2Cl2,CHCl3和CCl4对PE液晶结构的影响

采用小角X射线散射法研究了CH_2Cl_2、CHCl_3和CCl_4对磷脂酰乙醇胺(PE)液晶结构影响的机理.CH_3Cl_2、CHCl_3和CCl_4对PE液晶结构影响的差别主要是其空间旋转电子云密度分布形状不同所致.空间旋转电子云密度分布呈椭球状的物质有使PE液晶形成六角形H_1相的趋向;呈圆锥状的物质有诱发PE液晶形成立方六角相的趋向;呈球状的物质有使PE液晶形成片层立方相的趋向.

A Study of the Influences of CH_2C1_2, CHC1_3, CCl_4 on the PE Liquid Crystal Structure by Means of SAXS

In this paper, the influences of CH2C12, CHC13 and CCl4 on the liquid crystal structure of phosphatidythanolamine(PE) have been investigated by using the method of SAXS (the small angle X-ray scattering) respectively. The experimental results show the structure of the PE liquid crystal phase is primarily influenced by space-spinning electronic cloud density distribution of CH2Cl2 , CHCl3 and CCl4. The compounds whose space-spinning electronic cloud density distribution assumes spinning oval ball in shape give the mechanism that makes the PE liquid crystal state to form hexagonal I phase; The compounds whose space-spinning electronic cloud density distribution assumes spinning taper in shape give the mechanism that makes the PE liquid crystal state to form cubic-hexagonal phase. The compounds whose space-spinning electronic cloud density distribution assumes spinning ball in shape give the mechanism that makes the PE liquid crystal state to form lamemller-cube phase.