CARBOXYLIC ESTER DERIVATIVES CONTAINING ETHER GROUP AND LIQUID-CRYSTAL COMPOSITION CONTAINING THE SAME
申请人:CHISSO CORPORATION
公开号:EP0884302A1
公开(公告)日:1998-12-16
A compound represented by the following general formula (I), a liquid crystal composition comprising the same, and a liquid crystal element using this liquid crystal composition.
(wherein B1 and B2 represent independently a trans-1,4-cyclohexylene group or a 1,4-phenylene group wherein at least one hydrogen atom on the six-membered ring is optionally substituted by a halogen atom, Y represents a halogen-substituted alkyl group having 1 to 3 carbon atoms, a halogen-substituted alkoxy group having 1 to 3 carbon atoms, a cyano group, a fluorine atom or a chlorine atom, X represents a fluorine atom, a chlorine atom or a hydrogen atom, R1 represents an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms, n and m represent independently 1 or 2 and p represents 0 or 1.)
The compound of the present invention exhibits a large dielectric anisotropy, low threshold voltage, and favorable temperature-dependency of threshold voltage, as well as a favorable miscibility with a known liquid crystal compound, and therefore a liquid crystal composition comprising the compound can provide low voltage-operable liquid crystal display elements.
一种由以下通式(I)代表的化合物、一种由其组成的液晶组合物以及一种使用该液晶组合物的液晶元件。
(其中 B1 和 B2 分别代表反式-1,4-环己烯基团或 1,4-亚苯基,其中六元环上的至少一个氢原子任选被卤素原子取代;Y 代表具有 1 至 3 个碳原子的卤素取代的烷基、具有 1 至 3 个碳原子的卤素取代的烷氧基、氰基、氟原子或氯原子;X 代表具有 1 至 3 个碳原子的卤素取代的烷基、具有 1 至 3 个碳原子的卤素取代的烷氧基、具有 1 至 3 个碳原子的卤素取代的氰基、氟原子或氯原子、X 代表氟原子、氯原子或氢原子,R1 代表具有 1 至 10 个碳原子的烷基或具有 1 至 10 个碳原子的烷氧基,n 和 m 独立地代表 1 或 2,p 代表 0 或 1。)
本发明的化合物显示出较大的介电各向异性、较低的阈值电压和阈值电压的良好温度依赖性,以及与已知液晶化合物的良好混溶性,因此包含该化合物的液晶组合物可以提供低电压工作的液晶显示元件。