A fast controlled synthesis of poly(p-phenyleneethynylene)s under transition-metal-free conditions
A fast controlled synthesis of poly(p-phenyleneethynylene)s under transition-metal-free conditions
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DOI：
10.1039/c6py00030d
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发表时间：
2016-03
影响因子：
4.6
通讯作者：
Asahi Motoshige;Junko Kakinuma;T. Iyoda;T. Sanji
中科院分区：
文献类型：
--
作者：
Asahi Motoshige;Junko Kakinuma;T. Iyoda;T. Sanji
描述了一种无过渡金属的ab型单体聚合，用于合成定义良好的聚对苯乙烯。1-五氟苯乙基-4-[（三甲基硅基）乙基]苯与催化量的四丁基氟化铵或t-丁氧化钾在隐体存在下的聚合[2.2.2]可在几分钟内得到聚合物。在监测聚合时，分子量作为单体转化率的函数呈线性关系，其中多分散性指数在1.6左右。聚合主要通过分子内氟离子转移到聚合物端进行。还证明了活性聚合末端的端盖作用。
A transition-metal-free polymerization of an AB-type monomer for the synthesis of well-defined poly(p-phenyleneethynylene)s is described. The polymerization of 1-pentafluorophenylethynyl-4-[(trimethylsilyl)ethynyl]benzene with a catalytic amount of tetrabutylammonium fluoride or potassium t-butoxide in the presence of cryptand[2.2.2] affords polymers within a few minutes. When monitoring the polymerization, the molecular weight as a function of monomer conversion shows a linear relationship, where the polydispersity indexes are around 1.6. The polymerization proceeds predominantly via intramolecular fluoride anion transfer to the polymer end. End capping of the active polymerization end is also demonstrated.