Liquid crystal compound containing difluoromethoxy bridge bond and use thereof

The invention relates to a liquid crystal compound having a structure shown in the formula I. In the formula 1, R represents H, or unsubstituted C1-12 alkyl or alkoxy, or C1-12 alkyl or alkoxy with one or more H replaced by halogens, A1, A2 and A3 independently represent a single bond, 1, 4-cyclohexyl and 1, 4-phenyl, H in the 1, 4-phenyl can be independently substituted by one or more halogens, and Z1 and Z2 independently represent a single bond or -(CH2)2-. The liquid crystal compound has the characteristics of low rotational viscosity, large dielectric anisotropy, good mutual solubility andstable performances. A composition with the liquid crystal compound can reduce the driving voltage of the device and has a broad application prospect. 本发明涉及种如式Ⅰ所示结构的液晶化合物，其中，R选自H和未取代或其中个或多个H由卤素取代的含有1-12个碳原子的烷基或烷氧基；A、A和A各自独立地选自：单键、1，4-环己基、1，4-苯基，其中1，4-苯基中的氢各自独立地可被个或多个卤素取代；Z和Z各自独立地选自单键或-(CH)-。本发明所述化合物具有旋转粘度低、介电各向异性大、互溶性好和性能稳定的特点应用至组合物后可降低器件的驱动电压，具有广阔的应用前景。