A difluoride derivative represented by the general formula: R1-(A1-Y1)m-A2-CF=CF-C≡C-A3-(Y2-A4)n-R2, wherein A1 through A4 represent each trans-1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene; m and n represent each 0 or 1; and R1 and R2 represent each C1-C10 alkyl, halogen or cyano. The compound is lowly viscous and light-stable, and hence can provide a liquid crystal composition having high response speed.
                            由通式代表的二
氟化物衍
生物:R1-(A1-Y1)m-A2-CF=CF-C≡C-A3-(Y2-A4)n-R2,其中 A1 至 A4 分别代表反式-1,4-
环己烯、1,4-
环己烯或 1,4-亚苯基;m 和 n 分别代表 0 或 1;以及 R1 和 R2 分别代表 C1-C10 烷基、卤素或
氰基。该化合物具有低粘度和光稳定性,因此可以提供具有高响应速度的液晶组合物。