一种新型液晶化合物的合成和表征  

Synthesis and characterization of a novel liquid crystalline compound

作　　者：王玉辉 刘尚清 赵灵春 王涛 

机构地区：[1]神华包头煤化工有限责任公司,包头014010

出　　处：《分析仪器》2017年第6期134-139,共6页Analytical Instrumentation

摘　　要：通过醚化、还原、重氮化、偶合反应及酯化等反应,合成了新型液晶化合物4-((4-己烷氧苯基)偶氮基)苯基异烟酸酯,并将此化合物作为质子受体,以烷氧基苯甲酸为质子供体,最后合成了一种氢键型液晶复合物。用IR、~1 H NMR对中间体及其产物进行了结构表征,并用带热台的偏光显微镜对各产物的液晶行为进行了研究。通过偏光显微镜说明氢键复合物是典型的热致液晶且呈现明显的近晶相和向列相两种相态,并且超分子液晶复合物较质子供体的液晶相范围宽,说明分子间氢键起到了稳定液晶相态的作用。A new hydrogen bonded supramolecular liquid crystal compound was synthesized. 4-（（4- （hexoxy） phenyl） azo） phenyl isonicotinic acid ester which played the role of the proton receptor,was synthesized through etherification, reduction, diazotization, coupling reaction and esterification reactions,and 4-alkoxybenzoic acid was as the proton donor. The structures of proton donor and supermolecular liquid crystalline compounds were identified by IR and ^1H-NMR. Their liquid crystalline phase transitions were studied by optical polarization microscope. The results of optical polarization microscope showed that the supermolecular liquid crystalline compounds were typically thermotropic,which exhibited both the smetic and nematic phases. These supermolecular liquid crystalline compounds were with wide phase transition temperatures. Therefore, it was concluded that liquid crystalline phase could be stabilized by the intermolecular hydrogen bonding action.

关 键 词：偶氮型 近晶相 向列相 

分 类 号：O753.2[理学—晶体学]