申请人:Showa Shell Sekiyu Kabushiki Kaisha
公开号:EP0327349A2
公开(公告)日:1989-08-09
Liquid crystal compounds represented by the formula;
in which Ra means an alkyl group of 1 - 20 carbon m 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; X means
Y means
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.
由以下式子表示的液晶化合物
其中,Ra 是指 1-20 个碳原子的烷基或 1-20 个碳原子的烷氧基;Rb 是指分别具有 1-20 个碳原子的脂肪族烷基、支链烷基或芳烷基、1-20 个碳原子的烷氧基或烷基中具有 1-20 个碳原子的烷酰基甲基;X 是指
Y 指
Z 指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,其中当 n 为 0 时,Y 为单键;且 * 表示光学活性中心,具有较大的自发偏振、较高的响应速度和良好的取向性,并显示三稳态液晶相。