申请人:Chisso Corporation
公开号:EP0816332A1
公开(公告)日:1998-01-07
A propiolonitrile derivative of formula (I)
wherein n1 and n2 each independently stand for 0 or 1; A1, A2 and A3 each independently represent a 1,4-phenylene, a 1,4-phenylene substituted by one or more fluorine atoms, a trans-1,4-cyclohexylene, a 1,3-dioxane-2,5-diyl or a 1,3-pyrimidine-2,5-diyl; Z1, Z2 and Z3 each independently represent a single bond, ethylene, ethenylene, ethynylene, carbonyloxy, oxycarbonyl, methyleneoxy, oxymethylene, 1,4-butylene or 1,4-butenylene; R represents a saturated, aliphatic hydrocarbyl radical of 1-10 carbons, an unsaturated, aliphatic hydrocarbyl radical of 2-10 carbons, a saturated or unsaturated, aliphatic hydrocarbyl radical of 1-10 carbons containing one or more ether linkages (-O-) in the chain and a saturated or unsaturated, fluoro-substituted aliphatic hydrocarbyl radical of 1-10 carbons containing one or more fluorine atoms in the chain; X1 and X2 each independently represent H, F or Cl;
provided that at least one of X1 and X2 is F or Cl, when both n1 and n2 are 0, Z1 represents a single bond, ethylene, carbonyloxy or oxycarbonyl and R represents alkyl or alkoxy; or when n1 is 1, n2 is 1 or 0, Z1 and Z2 each independently represent a single bond or ethylene, Z3 represents ethylene and R represents alkyl or alkoxy. They have excellent properties as the ingredient of a liquid crystal composition, e.g. broad liquid crystal temperature range, high dielectric anisotropy and good compatibility with other liquid crystalline compounds, while keeping the properties of the composition such as low viscosity and being capable of providing high elastic constant ratio.
一种式(I)的丙炔腈衍生物
其中 n1 和 n2 各自独立地代表 0 或 1;A1、A2 和 A3 各自独立地代表 1,4-亚苯基、被一个或多个氟原子取代的 1,4-亚苯基、反式-1,4-环己烯、1,3-二氧六环-2,5-二基或 1,3-嘧啶-2,5-二基;Z1、Z2 和 Z3 各自独立地代表单键、乙烯、乙烯基、乙炔基、碳酰氧基、氧羰基、亚甲基氧基、氧亚甲基、1,4-丁烯或 1,4-丁烯;R 代表 1-10 个碳原子的饱和脂肪族烃基,2-10 个碳原子的不饱和脂肪族烃基,1-10 个碳原子的饱和或不饱和脂肪族烃基,链中含有一个或多个醚键(-O-),以及 1-10 个碳原子的饱和或不饱和氟代脂肪族烃基,链中含有一个或多个氟原子; X1 和 X2 各自独立地代表 H、F 或 Cl;
当 n1 和 n2 均为 0 时,Z1 代表单键、乙烯、羰氧基或氧羰基,R 代表烷基或烷氧基;或当 n1 为 1,n2 为 1 或 0 时,Z1 和 Z2 各自独立地代表单键或乙烯,Z3 代表乙烯,R 代表烷基或烷氧基。作为液晶组合物的成分,它们具有优异的性能,例如宽液晶温度范围、高介电各向异性以及与其他液晶化合物的良好兼容性,同时还能保持组合物的特性,如低粘度和能够提供高弹性常数比。