合成了一系列希夫碱酯类化合物——4-(4-烷基反式环己基)苯甲酸4-(2,3,4-三氟苯胺亚甲基)苯酚酯.通过红外光谱(FTIR)和氢核磁共振(1HNMR)对产物化学结构进行了确认,并采用偏光显微镜(POM)和差示扫描量热仪(DSC)对其中间相性能进行了研究.结果表明,所得产物均存在近晶相和向列相且清亮点均高于300℃;随着烷基链长度增加,其熔点降低,但对清亮点的影响不大,近晶相存在的温度范围增大,而向列相温度范围缩小. A series of Schiff base ester compounds, 4- (2,3,4-trifluoroanilinmethylene) phenol 4- (4-alkyl transcyclohexyl) benzoate, were synthesized and characterized by FTIR ) And hydrogen nuclear magnetic resonance (1HNMR) were used to confirm the chemical structure of the product, and the mesophase properties were studied by POM and DSC.The results showed that the products were near Crystal phase and nematic phase and clear point are higher than 300 ℃; with the alkyl chain length increases, the melting point decreases, but the impact on the clearing point is not large, the temperature range of smectic phase increases, while the nematic phase Narrow temperature range.