Synthesis of liquid crystalline aromatic amide compounds

合成了一系列纯粹以酰胺基为中心桥键的刚性芳香酰胶小分子化合物，并对其作了表征，发现其中有些化合物具有液晶性．酰胺键之间能形成很强的分子间氢键，使芳香酰胶小分子化合物的熔点很高，难于形成液晶态．研究发现，如果在这类化合物的中心本环上引入合适的取代基以减弱分子间氢键，同时引入合适的末端基时，则可使芳香酰胶化合物生成液晶相的能力增强．The synthesis and characterization of a new series of aromatic amide compounds that have only amide linkage between the phenyl rings are reported, Some of them are found to be thermotropic liquid crystals. Aromatic amide compounds are considered undesirable for forming thermotropic liquid crystal because the extensive hydrogen bonding among the molecules would result in too high the melting point, In this study we found that the aromatic amide compounds with proper lateral substitution on center phenylene and proper terminal groups at the two ends of the rod-like molecules were able to form thermotropic liquid crystalline phases.SCI(E)中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)706963-9671