| abstract |
(57) [Summary] [Structure] General formula (I): (In the formulae, R is alkyl, alkoxy, etc., in which the —CH 2 — group may be replaced by oxygen; A 1 is 1,4 - phenylene, pyridine-2,5-diyl; A 2 is such trans-1,4-cyclohexylene fluoro substituted; Z 1 and Z 2 are a single covalent bond, -OCH 2 -, etc.; n Represents 0 or 1; m is 0 or 1, provided that n + m ≦ 1; And X is a compound represented by cyano, —CF 3 , alkyl, alkenyl, etc.), a liquid crystal mixture containing the same, and its use. [Effect] The above compound is a liquid crystal compound having good chemical, photochemical and thermal stability and stability against electric field, and has high dielectric anisotropy and low rotational viscosity, which makes the liquid crystal mixture low threshold potential and short. This is the response time. It is particularly suitable for use in eg TN, STN or TFT cells. |