CAJ | 학술논문

制备了基于季戊四醇外围含丁氧基/己氧基偶氮苯基团的新型硅碳烷液晶树状物.利用Williamson反应和偶氮反应合成了4-[4-(6-羟己氧基)苯基]丁氧基偶氮苯与4-[4-(6-羟己氧基)苯基]己氧基偶氮苯两种液晶基元.以基于季戊四醇端基为Si-Cl键的硅碳烷树状物为脚手架,分别以上述两种偶氮苯液晶基团对其表面进行修饰,得到两种树状液晶化合物.采用偏光显微镜(POM)和示差扫描量热法(DSC)对修饰单元和树状物的液晶性进行表征,表明其均示向列相.
제비료기우계무사순외위함정양기/기양기우담분기단적신형규탄완액정수상물.이용Williamson반응화우담반응합성료4-[4-(6-간기양기)분기]정양기우담분여4-[4-(6-간기양기)분기]기양기우담분량충액정기원.이기우계무사순단기위Si-Cl건적규탄완수상물위각수가,분별이상술량충우담분액정기단대기표면진행수식,득도량충수상액정화합물.채용편광현미경(POM)화시차소묘량열법(DSC)대수식단원화수상물적액정성진행표정,표명기균시향렬상.
Liquid crystalline dendrimers with peripheral mesogenic groups have been prepared. Azo-reaction and Williamson synthesis were used in the preparation of the mesogenic groups, 4-[4-(6-hydroxyhexyloxy)phenyl] butoxyazobenzene and 4-[4-(6-hydroxyhexyloxy)phenyl] hexaoxyazobenzene. A terminal Si-Cl functional carbosilane dendrimer based on pentaerythritol was used as dendritic scaffold and was subsequently functionalized with the aforementioned groups. Investigation of the liquid crystalline properties of both the mesogenic groups and the mesogen-functionalized dendrimers by polarized optical microscopy (POM)and differential scanning calorimetry (DSC) showed that they exhibited nematic phases.