新型含氟甾体类液晶的合成与相变研究  

Synthesis and Characteristics of Novel Fluorinated Steroidal Liquid Crystals

作　　者：刘克刚[1] 李衡峰[1] 沈悦海[1] 王侃[1] 闻建勋[1] 

机构地区：[1]中国科学院上海有机化学研究所,上海200032

出　　处：《液晶与显示》2001年第3期181-187,共7页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金资助 (2 99740 3 8)

摘　　要：设计并合成了 3个系列的侧位氟原子取代的甾类液晶 ,其相变行为通过偏光显微镜观察和 DSC进行验证 ,可以发现氟原子的取代位置不同 ,对化合物的相变性质影响很大。Three series of fluorinated steroidal liquid crystals were synthesized. The mesomorphic behaviors of the compounds were characterized by differential scanning calorimetry (DSC) and optical polarization microscopy (POM). Two series of the compounds A and compounds C exhibit a cholesteric phase only, and the series of compounds B exhibit a smectic A and a cholesteric phase. The relationship between the structure and the properties is discussed in detail.

关 键 词：液晶 铁电性 近晶相 氟甾体 合成 相变性质 

分 类 号：O753.2[理学—晶体学]