Liquid crystal compound showing negative dielectric anisotropy, liquid crystal composition and liquid crystal display device
申请人:JNC CORPORATION
公开号:US09102871B2
公开(公告)日:2015-08-11
To provide a liquid crystal compound having a large negative value of dielectric anisotropy (Δ∈). A compound is represented by formula (1):
wherein, in formula (1), one of Y1 and Y2 is fluorine, and the other is CF2H or CF3; G is a ring represented by formula (pr-1) or formula (pr-2):
wherein A1 to A3 are independently 1,4-cyclohexylene or 1,4-phenylene; Ra and Rb are independently hydrogen, alkyl having 1 to 20 carbons, or the like; Z0, and Z1 to Z3 are independently a single bond, —(CH2)2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO— or —OCO—; j, m and n are an integer from 0 to 2, and a sum of j, m and n is 0, 1 or 2, however, when m is 0, Y1 is CF2H or CF3, Y2 is fluorine, and Z0 is a single bond, G is a ring represented by formula (pr-1).
提供一种具有大负介电各向异性值(Δ∈)的液晶化合物。该化合物由公式(1)表示:其中,在公式(1)中,Y1和Y2中的一个是氟,另一个是CF2H或CF3;G是由公式(pr-1)或公式(pr-2)表示的环:其中,A1到A3独立地为1,4-环己基或1,4-苯基;Ra和Rb独立地为氢、具有1到20个碳的烷基或类似物;Z0和Z1到Z3独立地为单键、-(CH2)2-、-CH═CH-、-CF2O-、-OCF2-、-CH2O-、-OCH2-、-COO-或-OCO-;j、m和n为0到2的整数,j、m和n的总和为0、1或2,但当m为0时,Y1为CF2H或CF3,Y2为氟,Z0为单键,G是由公式(pr-1)表示的环。