作者:Jonas Gruber、Rosamaria Wu Chia Li
DOI:10.1039/a901426h
日期:——
A series of three 2,2â²-substituted 4,4â²-dimethylbiphenyls have been prepared either by Grignard or Ullmann reactions and their benzylic bromination with NBS gave the corresponding 4,4â²-bis(dibromomethyl)biphenyls. The cathodic reduction of these compounds, at a stirred mercury pool cathode led to the desired poly(4,4â²-biphenylenevinylene)s, PBPVs, in good yields and in very smooth conditions. The obtained polymers have been spectroscopically characterized. After doping with iodine vapours, they exhibited electrical conductivities of the same magnitude as those observed for parent PPVs. Thermal analysis data (DSC and TG) are also presented and show their thermal stability both in air or nitrogen atmosphere.
一系列三种2,2'-取代的4,4'-二甲基联苯已通过格里尼亚反应或乌尔曼反应合成,并且它们与NBS的苯基溴化反应生成相应的4,4'-双(二溴甲基)联苯。这些化合物在搅拌的汞池阴极下进行阴极还原,得到了所需的聚(4,4'-联苯乙烯),PBPVs,产率良好,条件非常顺利。所获得的聚合物已通过光谱学方法进行表征。经过碘蒸气掺杂后,它们表现出与母体PPVs相同数量级的电导率。还提供了热分析数据(DSC和TG),显示它们在空气或氮气气氛中的热稳定性。