巯基-端烯/炔点击反应合成棒状液晶化合物

Syntheses of Calamitic Liquid Crystalline Compounds by Thiol-ene or Thiol-yne Click Reaction

将巯基-端烯/炔点击反应应用于制备潜在的液晶显示材料、液晶半导体材料.即在室温条件下,催化量的安息香二甲醚作为光引发剂,365 nm波长紫外光辐照正十二硫醇和端炔/烯三联苯、联苯化合物4 h即可以合成60%左右产率的目标产物.化合物的结构通过核磁共振氢谱、红外光谱和元素分析进行表征;目标化合物的介晶性经差示扫描量热法、偏光显微镜和变温X射线衍射法测试.结果显示含三联苯刚性核的化合物2呈现多个晶态和多个近晶相.

This paper successfully used thiol-ene and thiol-yne click reaction in the preparation of calamitic liquid crystalline materials which will be applied to display or semiconductor materials. We used catalytic amount of 2,2-dimethoxy-2-phenylacetophenone as the photoinitiator and 365 nm wavelength UV irradiation of thiol-ene or thiol-yne four hours to obtain a moderate yield at room temperature. Target compounds were characterized by1 H NMR,FTIR and EA characterization. Mesomorphism of the target compound was confirmed by differential scanning calorimetry（ DSC）,polarized light microscopy（ POM） and X-ray diffraction（ XRD） at different temperatures. The results show that multiple crystalline states and smectic liquid crystalline states can be observed in terphenyl compound 2.