Effects of molecular configuration of a chiral trimeric phenylene vinylene on its liquid crystalline properties
作者:Ping Yu、Zhen-Lin Zhang、Lei Wang、Chun-Luan Liu、Shi-Min Liu、Hai-Quan Zhang
DOI:10.1016/j.cclet.2013.02.013
日期:2013.5
trans–cis configuration, and it could be isomerized to the trans–trans isomer when treated with iodine. The melting point of ChTPV with a trans–trans configuration increased by 162.1 °C compared to the trans–cis isomer, and the ChTPV with trans–trans configuration exhibited the typical liquid-crystalline texture of the smectic A in the heating process. The results indicated that the molecular configuration
根据1H NMR,FT-IR,UV-vis光谱分析,确定由Wittig反应合成的手性三聚亚苯基亚乙烯基衍生物(ChTPV)具有反式-顺式构型,并且可以异构化为反式用碘处理时,-反式异构体。与反式-顺式异构体相比,具有反式-反式构型的ChTPV的熔点提高了162.1°C,具有反式-反式构型的ChTPV在加热过程中表现出近晶A的典型液晶结构。结果表明,分子构型可以影响ChTPV液晶相的形成。