Liquid Crystal compound containing cyclobutyl group and difluoromethyleneoxy linking group, and preparation method and use thereof

摘要

A liquid crystal compound containing cyclobutyl and a linking group difluoromethyleneoxy, and a preparation method and use thereof are disclosed. The compound is as shown in Formula I. The liquid crystal compound containing cyclobutyl as a terminal group and difluoromethyleneoxy (—CF2O—) as a linking group in the molecular structure of Formula I according to the present invention, has not only a high dielectric anisotropy, but also importantly an extremely fast response speed and a high clearing point, which are of great significance for the formulation of a liquid crystal mixture.;

主权项

1. A compound of Formula I whereinis selected from 1,4-cyclohexylene, 1,4-cyclohexylene in which one —CH2— is substituted with O, 1,4-phenylene and 1,4-phenylene substituted with fluoro;is selected from 1,4-phenylene and 1,4-phenylene substituted with fluoro;
X1, X2, X3 and X4 are each independently selected from H and F; X5 is selected from H, F, Cl, CF3, CHF2, OCF3 and OCHF2; m is selected from 1, 2 and 3; and n is selected from 0 and 1.