【作者】 王子杰； 邓颖娇； 蒋雄； 韩智龙； 杨应平； 贺晓慧；

【Author】 Zijie Wang;Yingjiao Deng;Xiong Jiang;Zhilong Han;Yingping Yang;Xiaohui He;School of Materials Science and Engineering, Nanchang University;

【机构】 南昌大学材料科学与工程学院；

【摘要】 后过渡金属催化剂催化环烯烃聚合的催化性能以及所得聚合物的结构性能主要取决于配体和中心金属的类型,而配体取代基的位阻效应和电子效应又是一个重要的影响因素。目前对于电子效应影响的报道较少。通过电子效应的改变中心金属周围的电荷密度进而调节烯烃配位聚合环境,促进烯烃单体的配位插入聚合,最终对催化剂活性和聚合物性质产生影响。本文设计合成了如图1所示一系列苯并环己酮芳亚胺镍催化剂,通过改变配体部分N-芳环上取代基的电子效应来调控金属中心的电负性,从而调节催化剂的催化活性。应用于催化降冰片烯与极性单体共聚合,结果表明,具有吸电子基团的催化剂（Ar=p-PhCF₃,p-Ph F,p-Ph OCH₃,p-PhNO₂）活性明显高于含有给电子基团的催化剂（Ar=p-PhCH₃）,且吸电子能力越强,催化剂活性越高。更多还原

【Abstract】 The catalytic performance of late transition metal catalysts and the structure property of polymers are mainly determined by the types of the metal centers and ligands, and the space steric hindrance and electronic effect of the substituents in the ligands is an important influence factor. At present, the influence of space steric hindrance has been studied extensively, however, there are few reports on electronic effect. Therefore, we have aimed at examining the effect of electron-withdrawing groups and electron-donating groups in the N-aryl rings on the catalytic activity. In this paper, we have prepared a series of different substituent catalysts and compared their activities toward copolymerization norbornene and polar monomer upon activation with B（C₆F₅）₃. The catalyst activity with electron-withdrawing group was found to be higher than that of the catalyst containing the electron-donating group, and the catalyst activity was enhanced with the enhancement of the ability of electron-withdrawing.更多还原