为了满足液晶母体在不同情况下的参数需求,合成了3种含有噁二唑结构的新型负性未知化合物用于液晶母体的调配.以芳烃的碘代物为原料,通过三步反应合成了该类新型化合物.通过核磁共振(NMR)、元素分析(EA)和红外光谱(FT-IR)等分析方法确认了分子结构;利用偏光显微镜(POM)、示差扫描量热仪(DSC)等测试手段,对该类化合物的液晶参数进行了测定.实验表明,该类新型的1,2,4-噁二唑类化合物具有较小的光学各向异性值(△n＝0.107～0.118)和负值较大的介电各向异性值(△ε=-1.6～-4.3),并且个别单体具有较宽的相列相温度范围.该类新型的1,2,4-噁二唑类化合物可以用于液晶母体的调配并改善部分性能,且制备方法原料易得,合成路线简单,收率较高,易于实现工业化生产.
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