中文摘要：

4-cyano- 和 4-nitro-substituted benzoate-tolanes 的四个相当或相同事物系列被红外， NMR， MS 系列和元素的分析综合并且描绘。他们的阶段转变行为被 DSC 调查并且极化光显微镜。在分子的核心单位的 perfluorophenyl 的不同位置的具有由中胚叶发达的性质上的效果，终端代替 cyano 的系统和终端代替 nitro 的被讨论。

英文摘要：

Abstract Four homologue series of 4-cyano- and 4-nitro-substituted benzoate-tolanes were synthesized and characterized by IR, NMR, MS spectra and elemental analysis. Their phase transition behaviors were investigated by DSC and polarized optical microscope. The effects on the mesomorphic properties of different positions of the perfluorophenyl in the molecular core unit, the terminal cyano-substituted systems and the terminal nitro-substituted ones were discussed.