Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization  

作　　者：Liang Fang Wen-Peng Zhao Chun-Yu Zhang Xue-Quan Zhang Xian-De Shen Heng Liu Toyoji Kakuchi 

机构地区：[1]Research Center for Polymer Materials,School of Materials Science and Engineering,Changchun University of Science and Technology,Jilin,130022,China [2]Key Laboratory of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science&Technology,Qingdao,266061,China [3]Division of Applied Chemistry,Faculty of Engineering,Hokkaido University,Sapporo,Hokkaido,060-8628,Japan

出　　处：《Chinese Journal of Polymer Science》2022年第11期1369-1379,共11页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.U1862206 and 21801236)。

摘　　要：A family of highly bulky bis(salicylaldiminate)Co(Ⅱ)complexes bearing cavity-like conformations are disclosed herein.Due to their unique bulky nature around the cobalt atoms that are reflected from space-filling models and the buried volume percentages,obviously longer bond distances of Co―N and Co―O are revealed from those complexes.Moreover,because of these well-protected active species,the cobalt complexes are able to catalyze 1,3-butadiene polymerization in high yields at extreme low catalyst concentrations,revealing a ultra high catalytic efficiency.At a ratio of 50000,all the complexes can afford polybutadiene with yields higher than 90%.Furthermore,the highly steric bulkiness of the ligand can also significantly enhance the thermostability of the active species.At temperature of 80-120°C,the complexes are able to successfully maintain high activities,giving polymer yields up to 90%.

关 键 词：Butadiene polymerization Bis(salicylaldiminate)Co(Ⅱ)complexes Ultra high catalytic efficiency 

分 类 号：TQ317[化学工程—高聚物工业] O641.4[理学—物理化学] TQ426[理学—化学]