申请人:Chisso Corporation
公开号:US05776367A1
公开(公告)日:1998-07-07
A novel liquid crystalline compound having a low viscosity and a high elastic constant ratio and at the same time, a superior compatibility with other known liquid crystalline compounds, and a liquid crystal composition and a liquid crystal display element containing the novel compound, are provided. The compound is an alkenylcyclohexane derivative expressed by the formula (1): ##STR1## wherein R.sup.1 and R.sup.2 represent a linear or branched alkyl group of 1 to 15 carbon atoms or alkenyl group of 2 to 15 carbon atoms; at least one of R.sup.1 and R.sup.2 represents an alkenyl group; in these groups, one or more non-adjacent CH.sub.2 groups may be replaced by oxygen atom, sulfur atom or --C.tbd.C-- group; ring A.sup.1, ring A.sup.2 and ring A.sup.3 each independently represent 1,4-cyclohexylene group wherein one or more CH.sub.2 groups on the ring may be replaced by oxygen atom or sulfur atom, or 1,4-phenylene group wherein one or more CH groups on the ring may be replaced by nitrogen atom; Z.sup.1 and Z.sup.2 each independently represent --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or single bond; Z.sup.3 represents --(CH.sub.2).sub.4 --, --CH.dbd.CH--(CH.sub.2).sub.2 --, --CH.sub.2 --CH.dbd.CH--CH.sub.2 -- or --(CH.sub.2).sub.2 --CH.dbd.CH--; and m, n and i each independently represent 0 or 1.
提供一种新型液晶化合物,具有低粘度和高弹性常数比,同时与其他已知液晶化合物具有良好的相容性,以及包含该新化合物的液晶组合物和液晶显示元件。该化合物是一种烯基环己烷衍生物,由式(1)表示:##STR1## 其中,R1和R2分别表示1到15个碳原子的线性或支链烷基或2到15个碳原子的烯基基团;其中至少一个是烯基基团;在这些基团中,一个或多个非相邻的CH2基团可以被氧原子、硫原子或--C.tbd.C--基团所取代;环A1、环A2和环A3各自独立地表示1,4-环己烯基团,其中环上的一个或多个CH2基团可以被氧原子或硫原子所取代,或者1,4-苯基团,其中环上的一个或多个CH基团可以被氮原子所取代;Z1和Z2各自独立地表示--CH2CH2--、--CH2O--、--OCH2--、--CH.dbd.CH--、--C.tbd.C--或单键;Z3表示--(CH2)4--、--CH.dbd.CH--(CH2)2--、--CH2--CH.dbd.CH--CH2--或--(CH2)2--CH.dbd.CH--;m、n和i各自独立地表示0或1。