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    • 4. 发明授权
    • Alkenylcyclohexane derivatives, liquid crystal composition and liquid
crystal display element
    • 烯基环己烷衍生物,液晶组合物和液晶显示元件
    • US5776367A
    • 1998-07-07
    • US666832
    • 1996-06-19
    • Shuichi MatsuiYasuyuki KoizumiTakashi KatoKazutoshi MiyazawaNorihisa HachiyaEtsuo Nakagawa
    • Shuichi MatsuiYasuyuki KoizumiTakashi KatoKazutoshi MiyazawaNorihisa HachiyaEtsuo Nakagawa
    • C07C13/28C07C255/50C07C255/55C09K19/30C09K19/42C09K19/44C09K19/46C07C19/08C09K19/52
    • C09K19/46C07C13/28C07C255/50C07C255/55C09K19/3001C09K19/3028C09K19/3048C09K19/42C09K19/44C07C2101/14C09K2019/0448C09K2019/0451
    • 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.
    • 提供了具有低粘度和高弹性常数比的新型液晶化合物,同时与其它已知的液晶化合物具有优异的相容性,以及液晶组合物和含有该新化合物的液晶显示元件。 化合物是由式(1)表示的烯基环己烷衍生物:其中R1和R2表示碳原子数为1〜15的直链或支链烷基或碳原子数2〜15的烯基; R 1和R 2中的至少一个表示烯基; 在这些基团中,一个或多个不相邻的CH 2基团可以被氧原子,硫原子或-C 3 D C基团取代; 环A1,环A2和环A3各自独立地表示1,4-亚环己基,其中环上的一个或多个CH 2基团可以被氧原子或硫原子替代,或1,4-亚苯基,其中一个或多个CH基团在 该环可以被氮原子取代; Z 1和Z 2各自独立地表示-CH 2 CH 2 - , - CH 2 O - , - OCH 2 - , - CH = CH - , - C 3BOND C-或单键; Z 3表示 - (CH 2)4 - , - CH = CH-(CH 2)2 - , - CH 2 -CH = CH-CH 2 - 或 - (CH 2)2 -CH = CH-; m,n和i各自独立地表示0或1。