Ferroelectric liquid crystal compounds with cyclohexenyl cores and compositions containing them
申请人:DISPLAYTECH, INCORPORATED
公开号:EP0582489A1
公开(公告)日:1994-02-09
Ferroelectric liquid crystal compounds and compositions containing cyclohexenyl derivatives are provided. Specifically provided are compounds of formula:
wherein R₁ and R₂ can be an alkyl, cycloalkyl, alkenyl, alkoxy, thioalkyl, alkylsilyl group having from one to about twenty carbon atoms. Y denotes -COO-, -OOC-, -CH₂O-, or -OCH₂-; and Ar₁ and Ar₂, 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. Ar₁ and Ar₂ 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。具体提供了式中的化合物:
其中 R₁和 R₂可以是具有一到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。Y表示-COO-、-OOC-、-CH₂O-或-OCH₂-;Ar₁和Ar₂可以彼此独立地选自由苯基环、卤代苯基环和含氮化合物组成的组。在优选的实施方案中,本发明的化合物含有至少一个含氮芳香环。Ar₁ 和 Ar₂ 可以选自 1,4-苯基、单卤代或二卤代 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-哒嗪基和 1,4-环己基中的一个或两个手性外消旋基团或手性非外消旋基团。