胆甾醇偶氮苯液晶分子的合成及光响应研究  

Synthesis and photoresponse of cholesterol-azobenzene liquid crystalline molecule

作　　者：刘立平 王干珍 龙亮 叶明 彭君 LIU Li-ping;WANG Gan-zhen;LONG Liang;YE Ming;PENG Jun(Hunan Province Geological Testing Institute,Changsha 410007,Hunan Province,China)

机构地区：[1]湖南省地质测试研究院,湖南长沙410007

出　　处：《化学工程》2018年第11期46-50,共5页Chemical Engineering(China)

基　　金：湖南省地质矿产勘查开发局科研基金资助项目(201808)

摘　　要：为了探究偶氮苯类化合物的液晶性及光响应性,文中以重氮偶合反应为关键步骤合成了胆甾醇偶氮苯化合物A,通过~1H NMR,^(13)C NMR和X-单晶衍射仪鉴定了其结构,属三斜晶系P1^-,在该晶体结构中芳香环之间以"肩并肩"呈层状排列。目标化合物的液晶性分别通过偏光显微镜(POM)、差示扫描量热仪(DSC)和X射线衍射仪(XRD)进行测试,并采用紫外(UV)光谱对其光响应行为进行了表征。研究测试结果表明:化合物A呈双层的层列相,在二氯甲烷溶液中紫外可见光下可观察到可逆的光响应性。In order to investigate liquid crystallinity and photoresponse of azobenzene compounds,a new cholesterol-azobenzene compound,named as A was synthesized via diazo coupling reaction,which was the key step.The structure of A was identified by 1H NMR,13 C NMR and X-single crystal diffractometer.The structure belongs to the triclinic system P1-,in which the aromatic rings are arranged side-by-side in a parallel way.The mesophase property was studied by polarizing microscope(POM),differential scanning calorimeter(DSC)and X-ray diffractomer(XRD),and photoresponse was characterized by UV spectroscopy.The results show that A is in a form of the double layer Lam phase,and the reversible photoisomerisation in dichlormethane solution is also observed in the presence of ultraviolet-visible light.

关 键 词：胆甾醇 偶氮苯 液晶 光致异构化 

分 类 号：O62[理学—有机化学]