Novel supramolecular columnar liquid crystals based on thiosemicarbazides
作者:E. Y. Elgueta、M. L. Parra、J. Barberá、J. M. Vergara、J. A. Ulloa
DOI:10.1080/10610278.2011.622390
日期:2011.11.1
Novel liquidcrystal materials based on 3,4-di-n-alkoxybenzoylthiosemicarbazides (3a–h, n = 5–10, 12, 14) were synthesised. The mesomorphic properties of these compounds were characterised and studied by differential scanning calorimetry, polarising optical microscopy and X-ray diffraction. Compound 3a did not show mesomorphic properties; 3b shows a monotropic hexagonal columnar (Colh) phase. Compounds
合成了基于 3,4-二-n-烷氧基苯甲酰氨基硫脲 (3a-h, n = 5-10, 12, 14) 的新型液晶材料。通过差示扫描量热法、偏光显微镜和 X 射线衍射对这些化合物的介晶性质进行了表征和研究。化合物3a没有表现出介晶性质;图3b显示了单向六方柱状(Colh)相。化合物 3c-h 显示出对映的 Colh 相。发现介晶性质取决于烷氧基侧链的长度。在 N,N-二甲基甲酰胺溶液中,所有化合物均显示出室温发射,λmax 为 361–332 nm。还进行了热重分析。