申请人:Showa Shell Sekiyu K.K.
公开号:US05204020A1
公开(公告)日:1993-04-20
Liquid crystal compounds represented by the formula; ##STR1## in which Ra means an alkyl group of 1-20 carbon atoms or an alkoxy group of 1-20 carbon atoms; Rb means an aliphatic alkyl group, a branched alkyl group or an aralkyl group respectively of 1-20 carbon atoms, an alkoxy group of 1-20 carbon atoms, or an alkanoyl methyl group having 1-20 carbon atoms in the alkyl; ##STR2## Z means a fluorinated alkyl or a fluorinated haloalkyl; m is an integer of from 1 to 3; n is an integer of from 0 to 2 where when n is 0, Y is a single bond; and * shows an optically active center, which have a larger spontaneous polarization, high speed of response and good orientation, and show tristable liquid crystal phase.
该化合物的液晶化合物的化学式为;##STR1## 其中Ra表示碳原子数为1-20的烷基或1-20的烷氧基; Rb分别表示碳原子数为1-20的脂肪烷基、支链烷基或芳基烷基、1-20的烷氧基或在烷基中具有1-20个碳原子的烷酰甲基; ##STR2## Z表示氟化烷基或氟化卤代烷基; m为1至3的整数; n为0至2的整数,当n为0时,Y为单键; *表示具有较大的自发极化、高响应速度和良好取向性,并显示三态液晶相的光学活性中心。