新型噻二唑类液晶的合成与研究

Synthesis and Properties of New Thiadiazole Liquid Crystalline Compounds

合成了以酰胺键为中心桥键的三芳环1,3,4-噻二环系共8个新化合物。液晶性质测试证明它们均为具有高相变温度和宽相变范围的稳定的液晶化合物。

Eight 2,5- bisphenyl - 1,3,4- thiadiazoles were synthesized. These new liquid crystalline compoundss contain amide bridge linkages. Their chemical structures were established by IR and H NMR spectroscopy. The liquid crystal properties were determined by POM and DSC. The results show that they all have higher phase transition temperature and wide phase transition temperature range due to introduction of the amide linkage at the thiadiazole ring.