A liquid crystalline compound having a remarkably high Δn and good miscibility with other liquid crystalline compounds, and expressed by the general formula (1)
wherein R1 represents, for example, a halogen atom, cyano group, or an alkyl or alkenyl group of 1 to 15 carbon atoms in which alkyl or alkenyl group hydrogen atom may be replaced, for example, by fluorine atom, and one or not-adjacent two or more methylene groups may be replaced by oxygen atom, -CH=CH- or -C≡C-; R2 represents an alkyl group of 1 to 10 carbon atoms or hydrogen atom; rings A1, A2, A3, and A4 independently represent, for example, 1,4-cyclohexylene or 1,4-phenylene in which hydrogen atom may be replaced by a halogen atom or cyano group; Z1, Z2, and Z3 independently represent, for example, a covalent bond or -CH2CH2-; s and t are 0 or 1; u is an integer of 1 to 5; and each of the elements in the general formula may be its isotope. A liquid crystal composition and a liquid crystal display device using the compound are also disclosed.
一种液晶化合物,其Δn 显著较高,且与其他液晶化合物有良好的混溶性,通式(1) 表示如下
其中 R1 代表卤素原子、
氰基或 1 至 15 个碳原子的烷基或烯基,其中烷基或烯基的氢原子可被
氟原子等取代,一个或不相邻的两个或多个亚甲基可被氧原子、-CH=CH- 或 -C≡C- 取代;R2 代表 1 至 10 个碳原子的烷基或氢原子;环 A1、A2、A3 和 A4 独立地代表例如 1,4-
环己烯或 1,4-亚苯基,其中氢原子可被卤素原子或
氰基取代;Z1、Z2 和 Z3 独立地代表例如共价键或 -CH2CH2-;s 和 t 为 0 或 1;u 为 1 至 5 的整数;通式中的每个元素可以是其同位素。还公开了一种液晶组合物和一种使用该化合物的液晶显示设备。