Synthesis and thermotropic properties of novel double-chained quaternary ammonium chlorides with symmetric and asymmetric hydrocarbon chain length
作者:Zhaoyun Ding、Aiyou Hao
DOI:10.1016/j.molstruc.2009.02.013
日期:2009.4
Abstract A series of novel double-chained quaternary ammonium chlorides with symmetrical and asymmetrical hydrocarbon chain length R1–O–CH2–CH(OH)–CH2–N+(CH3)2–R2·Cl− (R1, R2: C12H25, C14H29, C16H33) have been synthesized by the reaction of 1-O-alkyl glycidyl ether with N,N-dimethylalkylamine and N,N-dimethylalkylamine hydrochloride. Their chemical structures have been characterized through FT-IR,
摘要 一系列具有对称和不对称烃链长 R1–O–CH2–CH(OH)–CH2–N+(CH3)2–R2·Cl− (R1, R2: C12H25, C14H29, C16H33) 已通过 1-O-烷基缩水甘油醚与 N,N-二甲基烷基胺和 N,N-二甲基烷基胺盐酸盐的反应合成。它们的化学结构已通过 FT-IR、1H NMR、MS 和元素分析进行表征。已经通过差示扫描量热法 (DSC)、偏光显微镜 (PLM) 和 X 射线衍射 (XRD) 检查了它们的热致特性。已经发现,具有较长烃链长度和较高烃链长度不对称性的化合物表现出较低的熔点(Tm)、各向同性温度(Ti)和较窄的中间相温度范围。然而,烃链长度和烃链长度的对称性对液晶的类型影响不大。所有化合物都形成胆甾型液晶。