Novel photoresponsive dinuclear nickel catalysts for ethylene (co)polymerization  

作　　者：Chenlong Nan Tong Pang Jiaxing Zhao Lijia Fan Chen Zou Xin-Qi Hao Mao-Ping Song Jun-Fang Gong Changle Chen Hui Jiang 

机构地区：[1]College of Chemistry,Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,China [2]CAS Key Laboratory of Soft Matter Chemistry,Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei 230026,China

出　　处：《Science China Chemistry》2025年第2期714-722,共9页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(22471247,U1904212 and U2004191);the Natural Science Foundation of Henan Province(202300410477 and 222300420294);the China Postdoctoral Science Foundation(2020 M672260).

摘　　要：Compared with the conventional strategies of electronic and/or steric perturbation,catalytic olefin polymerization modulated by light irradiation or metal-metal cooperativity effect is a fascinating challenge that attracts considerable attention in the academic community.In this context,we design a strategy that could employ both effects to influence the polymerization process.Some dinuclear salicylaldimine andα-imino-ketone nickel complexes bearing a stiff-stilbene bridge were prepared,which could transfer between(E)-isomers and(Z)-isomers under ultraviolet irradiation.This isomerization can tune the electronic,steric and metal-metal cooperativity effects of the nickel catalysts.In this way,the catalytic activity,as well as polymer microstructures including molecular weight and branching density can be modulated in ethylene polymerization and copolymerization reactions.This strategy is generally applicable to other olefin polymerization catalytic systems and other types of transition metal mediated catalysis.

关 键 词：PHOTORESPONSIVE dinuclear catalyst nickel(II) polar monomer olefin copolymerization 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] O643.36[理学—物理化学]