FLUOROALKOXYBENZENE DERIVATIVES HAVING ETHER BOND, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
申请人:CHISSO CORPORATION
公开号:EP1020423A1
公开(公告)日:2000-07-19
Liquid crystalline compounds superior in having an eminent dielectric anisotropy, being stable against environment and having improved miscibility with other liquid crystalline compounds, as well as a liquid crystal composition with driving-ability at a low voltage and responsibility at a high-speed comprising the compounds as a constituting component, and a liquid crystal display element comprising the composition are provided, said compounds are fluoroalkoxybenzene derivatives expressed by the general formula (1)
wherein A1, A2 and A3 each independently denote trans-1,4-cyclohexylene, 1,4-phenylene or so; B1, B2 and B3 each independently denote a single bond, 1,2-ethylene or so; R denotes an alkyl group having 1 to 15 carbon atoms optionally substitutable with a halogen atom(s); Rf denotes a fluoroalkyl group having 1 to 3 carbon; k, m, and n each independently denote 0 or 1; with the proviso that when k=0 is a case, then one of B1, B2 and B3 is a methyleneoxy bond or so, and that when m+n≧1 is a case, then dependency of A1 , A2 and A3 is partly restricted and content of Rf is partly limited when B1 or/and B2 and B3 are all single bonds.
提供了介电各向异性突出、对环境稳定、与其他液晶化合物的混溶性提高的液晶化合物,以及以该化合物为组成成分的低压驱动性和高速责任性液晶组合物和包含该组合物的液晶显示元件,所述化合物为通式(1)表示的氟烷氧基苯衍生物
其中 A1、A2 和 A3 分别独立地表示反式-1,4-环己烯、1,4-亚苯基或其它;B1、B2 和 B3 分别独立地表示单键、1,2-亚乙基或其它;R 表示具有 1 至 15 个碳原子的烷基,可任选被卤原子取代;Rf 表示具有 1 至 3 个碳原子的氟烷基;k、m 和 n 分别独立地表示 0 或 1;但当 k=0 时,B1、B2 和 B3 中的一个或多个为亚甲基氧键;当 m+n≧1 时,当 B1 或/和 B2 和 B3 均为单键时,A1、A2 和 A3 的依赖性受到部分限制,Rf 的含量受到部分限制。