申请人:Showa Shell Sekiyu K.K.
公开号:US05424005A1
公开(公告)日:1995-06-13
A composition of (R)-isomer and (S)-isomer of a liquid crystal compound represented by the formula; ##STR1## wherein X represents --O-- or a direct bond, Z represents a halogen-substituted alkyl group selected from a group consisting of --CF.sub.3, --CHF.sub.2, --CH.sub.2 F, --C.sub.2 F.sub.5, --CClF.sub.2, -CCl.sub.2 F, --CCl.sub.2 CF.sub.3, and --C.sub.3 F.sub.7, m represents an integer of from 1 to 20, n represents an integer of from 1 to 20, and * represents an asymmetric carbon, and the optical purity of said composition is high enough to exhibit optically tristable states in S*(3) phase when electric voltage is applied.
由式子表示的液晶化合物的(R)-异构体和(S)-异构体的组合;其中X代表--O--或直接键,Z代表从--CF.sub.3,--CHF.sub.2,--CH.sub.2 F,--C.sub.2 F.sub.5,--CClF.sub.2,-CCl.sub.2 F,--CCl.sub.2 CF.sub.3和--C.sub.3 F.sub.7的卤代烷基组成的选择组,m表示1到20的整数,n表示1到20的整数,*代表不对称碳,且所述组合的光学纯度足够高,当施加电压时在S*(3)相中表现出光学三稳态。