FLUORINE-SUBSTITUTED LIQUID-CRYSTAL COMPOUND, LIQUID-CRYSTAL COMPOSITION AND LIQUID-CRYSTAL DISPLAY DEVICE

摘要

An object of the present invention is to provide a novel liquid crystalline compound having a large dielectric anisotropy, small change in threshold voltage depending on temperature, and an improved solubility to other liquid crystal materials at low temperatures, and expressed by the following general formula (1): CHEM wherein R represents, for example, an alkyl group or alkoxy group having 1 to 10 carbon atoms, m and n are independently 0 or 1, A1, A2, and A3 are independently, for example, trans-1,4-cyclohexylene group, 1,4-phenylene group one or more hydrogen atoms on the ring of which may be replaced by F, Z1, Z2, and Z3 independently represent -COO-, -OCO-, -(CH2)2-, -CH2O-, -OCH2-, or a covalent bond provided that at least one of Z1, Z2, and Z3 represents ester bond, -CH2O-, or -OCH2-, X represents, for example, CF3, CF2H, and Y represents H or F. Another object of the present invention is to provide a liquid crystal composition containing the liquid crystalline compound.