Synthesis, characterization of new carboxylic acid derivatives bearing 1,3,4-thiadiazole moiety and study their liquid crystalline behaviors
作者:Hamed J. Jaffer、Yasmeen A. Aldhaif、Ivan H. R. Tomi
DOI:10.1080/15421406.2016.1266881
日期:2017.1.22
derivatives containing 1,3,4-thiadiazole ring in their core and swinging alkoxy terminal were synthesized. They were characterized by 1H, 13C NMR spectroscopy, FTIR, and mass spectrometry. Their liquid crystalline behaviors have been studied by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The 1,3,4-thiadiazole compounds in this study were 2,5 di-substituted asymmetrical
摘要 合成了 13 种羧酸衍生物,其核心含有 1,3,4-噻二唑环,烷氧基末端摆动。它们通过 1H、13C NMR 光谱、FTIR 和质谱进行表征。已经通过差示扫描量热法 (DSC) 和偏光显微镜 (POM) 研究了它们的液晶行为。本研究中的 1,3,4-噻二唑化合物是 2,5 双取代的不对称、烷氧基和羧基键。具有长碳链烷氧基(n > 7)的化合物显示近晶C相。发现液晶性质受连接到苯基部分的烷氧基链长度的影响,两种类型的二聚形式是由羧酸分子之间的氢键相互作用产生的。