α-氰基肉桂酸酯类液晶的合成与性质研究  

Synthesis and Properties of α-Cyancinnamate Liquid Crystal Compounds

作　　者：丁兴立[1,2] 韩耀华[2] 钤秀丽 史子谦[2] 梁晓[1] 

机构地区：[1]清华大学化学系,北京100084 [2]石家庄永生华清液晶有限公司,河北石家庄050091

出　　处：《液晶与显示》2009年第5期635-639,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：国家"863"计划资助项目(No.2008AA03A304)

摘　　要：以对羟基苯甲醛和氰基乙酸乙酯缩合生成α-氰基对羟基肉桂酸乙酯,再与4种酰氯反应生成α-氰基肉桂酸酯类液晶;以对羟基苯甲醛和氰基乙酸丙基苯酚酯缩合生成α-氰基对羟基肉桂酸丙基苯酚酯,再与2种烷基环己基甲酰氯反应生成α-氰基肉桂酸酯类液晶。目标化合物经MS分析确认了结构。通过差示扫描量热仪测量相变温度,对合成产物的液晶相态进行了研究;通过紫外分光光度计测量紫外光谱,研究了合成产物紫外吸收性能。在混合液晶中的应用实验表明,此类化合物可以作为具有液晶性能的紫外吸收剂添加到混合液晶中,改善液晶材料的抗紫外性能。Ethyl α-cyano-4-hydroxycinnamate was synthesized by 4-hydroxybenzaldehyde and ethyl cyanoa-cetate. Four ester liquid crystal compounds were synthesized by four chloride and ethyl α-cyano-4-hydroxycinnamate. 4-propylphenol α-cyano-4-hydroxycinnamate was synthesized by 4-hydroxybenzaldehyde and 4-propylphenol cyanoacetate. Two ester liquid crystal compounds were synthesized by two alkyl-cyclohexyl carbonyl chloride and 4-propylphenolα-cyano-4-hydroxycinnamate. All the compounds were characterized by MS, and their phase transition temperatures were measured by DSC. Ultraviolet absorption spectra o{ them were measured by UV spectrophotometer. Their properties of anti-UV in the liquid crystal mixtures were studied. The result shows that such compounds can be added to liquid crystal mixtures as UV absorbent, thus improving liquid crystal mixtures＇ anti-UV properties.

关 键 词：液晶 α-氰基肉桂酸酯 氰基乙酸乙酯 KNOEVENAGEL CONDENSATION 

分 类 号：O753.2[理学—晶体学]