【摘要】 本文合成了两种单臂脂环18-冠-6液晶,羟甲基18-冠-6分别和4-（4′-正丁氧基苯甲酰氧基）苯甲酰氯或氯甲酸胆甾醇醋反应得到两种目标物,用DSC和偏光显微镜测定其相变温度,前者相变温度是T_KN4.0℃和T_NI33.5℃,后者相变温度T_KS-22.4℃,T_SN6.8℃,T_NI40.4℃,用等克分子的硬脂酸和该冠醚液晶制成LB膜,观察到Y型LB膜的特征。更多还原

【Abstract】 Two novel monoarmed alicyclic 18-crown-6 liquid crystals were designed and synthesized in an attempt to lower the phase transition temperature of crown ether liquid crystal. They were synthesized by treating hydroxymethyl 18-crown-6 with chloride 4-(4’-n -butoxybenzoyloxy) benzoylate or cholesteryl chlorocarbonate respectively. The phase transition temperatures were determined by DSC and polarized microscopy were found to be as follows: TKN, 4.0℃; TNI, 33.5℃ for the former and TKS, -22.4℃; TSN, 6.8℃; TNI, 40.4℃ for the latter. The characteristics of Y-type LB film, were observed from the LB film prepared with equimolecular stearic acid and the new liquid crystal.更多还原