Fluoroalkoxybenzene derivatives having ether bond, liquid-crystal composition, and liquid-crystal display element
申请人:Chisso Corporation
公开号:US06372153B1
公开(公告)日:2002-04-16
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; B, 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.
提供了一种优越的介电各向异性液晶化合物,其对环境稳定,且与其他液晶化合物的混溶性得到改善,以及一种低电压驱动能力和高速响应能力的液晶组合物,其包括该化合物作为构成成分,以及包括该组合物的液晶显示元件。所述化合物是由通式(1)表示的氟烷氧基苯衍生物,其中A1、A2和A3各自独立地表示反式-1,4-环己烷基、1,4-苯基或类似物;B、B2和B3各自独立地表示单键、1,2-乙烯或类似物;R表示具有1至15个碳原子的烷基,可选择地取代卤原子;Rf表示具有1至3个碳的氟烷基;k、m和n各自独立地表示0或1;在k=0的情况下,B1、B2和B3中的一个是甲氧基键或类似键;在m+n≥1的情况下,当B1或/和B2和B3都是单键时,A1、A2和A3的依赖性部分受限制,Rf的含量部分受限制。