The invention is to provide novel liquid crystalline compounds exhibiting particularly high Δε, excellent miscibility with other liquid crystalline compounds, and nematic phase in a wide temperature range without impairing characteristics peculiar to liquid crystalline compounds having fluorine atom; to provide liquid crystal compositions comprising the compound; and to provide liquid crystal display devices fabricated by using the composition; the compounds are phenylpolyhaloalkyl ether derivatives expressed by the general formula (1)
wherein X1 and X2 independently represent 1,2-ethylene group, 1,4-butylene group, or covalent bond provided that in no case are both X1 and X2 simultaneously a covalent bond; R1 represents an alkyl group having 1 to 20 carbon atoms in which alkyl group methylene group may be replaced by oxygen atom, vinylene group, or ethynylene group; Y1 represents -OCF2CFH-(CF2)n-F (n is 0, 1, 2, or 3) or -OCF2Cl; rings A1 and A2 independently represent 1,4-cyclohexylene ring, 1,4-cyclohexenylene ring, or 1,4-phenylene ring, A3 represents 1,4-phenylene ring, and the carbon atom in these rings may be replaced by oxygen atom or nitrogen atom, and the hydrogen atom on the rings may be replaced by fluorine atom or chlorine atom, respectively; m is 0 or 1; and each element which constitutes the compound may be its isotope.
本发明旨在提供新型液晶化合物,该化合物具有特别高的Δε,与其他液晶化合物具有优异的混溶性,并且在宽温度范围内具有向列相,同时不损害具有
氟原子的液晶化合物所特有的特性;提供包含该化合物的液晶组合物;以及提供使用该组合物制造的液晶显示设备;该化合物是由通式(1)表示的苯基多卤代烷基醚衍
生物。
其中 X1 和 X2 独立地代表 1,2-
乙烯基、1,4-
丁烯基或共价键,但在任何情况下 X1 和 X2 都不能同时为共价键;R1 代表具有 1 至 20 个碳原子的烷基,其中烷基亚甲基可以被氧原子、
乙烯基或
乙炔基取代;Y1 代表 -O
CF2CFH-(
CF2)n-F (n 为 0、1、2 或 3)或 -O
CF2Cl;环 A1 和 A2 分别独立地代表 1,4-
环己烯环、1,4-
环己烯环或 1,4-苯环,A3 代表 1,4-苯环,这些环中的碳原子可分别由氧原子或氮原子取代,环上的氢原子可分别由
氟原子或
氯原子取代;m 为 0 或 1;构成化合物的每个元素可以是其同位素。