申请人:Displaytech, Inc.
公开号:US05271864A1
公开(公告)日:1993-12-21
Ferroelectric liquid crystal compounds and compositions containing cyclohexenyl derivatives are provided. Specifically provided are compounds of formula: ##STR1## wherein R.sub.1 and R.sub.2 can be an alkyl, cycloalkyl, alkenyl, alkoxy, thioalkyl, alkylsilyl group having from one to about twenty carbon atoms. Y denotes --COO--, --OOC--, --CH.sub.2 O--, or --OCH.sub.2 --; and Ar.sub.1 and Ar.sub.2, independently of one another, can be selected from the group consisting of phenyl rings, halogenated phenyl rings and nitrogen-containing aromatic groups. In preferred embodiments the compounds of this invention contain at least one nitrogen-containing aromatic ring. Ar.sub.1 and Ar.sub.2 can be selected from 1,4-phenyl, mono- or dihalogenated 1,4-phenyl, 2,5-pyridinyl, 2,5-pyrimidyl, 2,5-pyrazinyl, 2,5-thiadiazole, 3,6-pyridazinyl and 1,4-cyclohexyl either or both be chiral racemic groups or chiral nonracemic groups.
提供了含有
环己烯衍
生物的
铁电
液晶化合物和组合物。具体提供的是以下式的化合物:其中R.sub.1和R.sub.2可以是具有一到约二十个
碳原子的烷基、
环烷基、
烯基、烷
氧基、
硫代烷基、烷基
硅基基团。Y表示--COO--、--OOC--、--CH.sub.2 O--或--OCH.sub.2 --;Ar.sub.1和Ar.sub.2彼此独立地可以从
苯环、卤代
苯环和含
氮芳基组成的群中选择。在本发明的优选实施例中,这些化合物至少含有一个含
氮芳香环。Ar.sub.1和Ar.sub.2可以从1,4-
苯基、单卤代或双卤代1,4-
苯基、2,5-
吡啶基、2,5-
嘧啶基、2,5-
吡嗪基、2,5-
噻二唑基、3,6-
吡啶并
吡嗪基和1,4-
环己基中选择,其中一个或两个可以是手性的外消旋群或手性的非外消旋群。