Diflourovinyl compound, liquid crystal composition and liquid crystal display

摘要

Provided are a liquid crystalline compound having a wide liquid crystal phase temperature range, low viscosity, a large elastic constant ratio K33/K11 and excellent solubility at low temperature, a liquid crystal composition using the same and a liquid crystal display. Provided is a novel difluorovinyl compound is represented by Formula (1) : wherein Y<1> represents H or a straight chain or branched alkyl group having 1 to 10 carbon atoms, and optional -CH2- in the above alkyl group may be replaced by -O-or -CH=CH-, but -O- is not adjacent to each other, and at least one H in Y<1> may be substituted with halogen or a cyano group; A<1>, A<2>, A<3> and A<4> each independently represent 1,4-cyclohexenylene in which optional -CH2- which is not adjacent to each other may be replaced by -O-, 1,4-phenylene in which optional H may be substituted with halogen, and a single bond, in which at least two of A<1>, A<2>, A<3> and A<4> have the ring structure described above, and at least one of them is 1,4-cyclohexenylene in which -CH2- is replaced by -O-; Z<1>, Z<2> and Z<3> each independently represent a single bond, -(CH2)2-, -CH=CH-, -(CH2)4-, -O(CH2)3- or -(CH2)3O-; n represents 0 or an integer of 1 to 10, provided that when any of A<1>, A<2>, A<3> and A<4> is 1,4-phenylene, Z<1>, Z<2> and Z<3> are single bonds, and among them, when A<1> is 1,3-dioxane-2,5-diyl and A<2> is 1,4-phenylene and when A<3> is 1,4-cyclohexylene and A<4> is a single bond, Y<1> is H, and n is not 0.