中文摘要：

有 isothiocyanate 和 naphthyl 组的液体水晶(LC ) 化合物是吸引人的高 birefringence LC 材料，并且能在光设备被使用。在这份报纸，电镀物品光的性质一系列这类 LC 混合物被调查。融化的点和这些 LC 混合物的热含量价值比与苯基组一起的相应混合物的那些高。这些混合物与 0.66 的最大的价值展出了高 birefringence。氟的符号替换在分子几乎不影响 birefringence 价值。当与 naphthyl 组一起的这些 LC 混合物在商业 LC 混合物被溶解时，取决于温度的电镀物品光的性质被调查。在低温度的区域，有 naphthyl 组 LC 混合物的 LC 混合物比纯商业 LC 展出了更高的粘性。在高温度的区域，粘性价值很仔细走近对方。当反应性能被调查时， figure-of-merit (FoM ) 价值被测量。与 naphthyl 组一起包含 LC 混合物的 LC 混合物的 FoM 值是比在低温度的区域的引用苯 LC 的那些低的。在高温度的区域，然而，结果被颠倒。与 naphthyl 组一起的这些 isothiocyanate LC 混合物能在特殊快反应的 LC 设备被使用，特别地，在高温度的条件下面使用了。

英文摘要：

Liquid crystal（LC） compound with isothiocyanate and naphthyl group is an attractive high birefringence LC material,and can be used in optical devices. In this paper, the electro-optical properties of a series of this type of LC compounds were investigated. The melting points and enthalpy values of these LC compounds were higher than those of corresponding compounds with the phenyl group. These compounds exhibited high birefringence with a maximum value of 0.66. Fluorine substitution in the molecular almost does not affect the birefringence value. When these LC compounds with the naphthyl group were dissolved in a commercial LC mixture, the electro-optical properties depending on temperature were investigated. In the low-temperature region, LC mixtures with the naphthyl-group LC compounds exhibited higher viscosity than pure commercial LCs. In the high-temperature region, viscosity values very closely approached each other. When response performance was investigated, figure-of-merit（FoM） values were measured. The Fo M values of LC mixtures containing LC compounds with naphthyl group were lower than those of reference benzene LCs in the low-temperature region. However, in the high-temperature region, the results were reversed. These isothiocyanate LC compounds with naphthyl group can be applied in special fast-response LC device, particularly the ones used under high-temperature conditions.