聚2,3,5,6-四甲氧基对苯乙炔的合成新方法

New method for poly(p-phenylene vinylene) derivatives synthesis

报道了以1,2,4,5 四甲氧基苯和1,2 二溴乙烷为单体,经过AlCl3催化的烷基化聚合反应和四氯苯醌脱氢反应,合成聚2,3,5,6 四甲氧基对苯乙炔(PTMPV)的方法;考察了催化剂用量、烷基化反应时间、溶剂等因素对聚2,3,5,6 四甲氧基对苯乙烯(PTMPE)收率及分子量的影响.实验研究结果表明四氯苯醌脱氢反应是PTMPE脱氢合成PTMPV的适宜方法.采用IR和1H NMR等分析方法对PTMPV的结构进行了表征,结果表明PTMPV具有链状π 共轭结构特征.

Poly2,3,5,6tetramethoxypphenylene vinylene (PTMPV) was synthesized through dehydrogenation from poly2,3,5,6tetramethoxypphenylene ethylene(PTMPE) prepared by FriedelCrafts reaction of 1,2,4,5tetramethoxy benzene with 1,2ethylene dibromide .The effects of FriedelCrafts reaction conditions on the yield and molecular weight of PTMPE were also investigated separately.According to its IR and UVvis spectra, PTMPV shows chainextended πconjugated system and the presence of both transand cisvinylene structure.