Synthesis of Heterometallic Rare Earth(Ⅲ)-Cobalt(Ⅱ)Complexes and Their Application in Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide  

作　　者：Yanping Song Kuan Yin Yongjie Chen Bei Zhao Yong Zhang Xuehua Zhu Dan Yuan Yingming Yao 

机构地区：[1]Key Laboratory of Organic Synthesis of Jiangsu Province,State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,College of Chemistry,Chemical Engineering&Materials Science,Dushu Lake Campus,Soochow University,Suzhou,Jiangsu,215123 China [2]Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis,Suzhou,Jiangsu,215123 China [3]Suzhou Industrial Park Institute of Services and Outsourcing,Suzhou,Jiangsu,215123 China [4]School of Chemistry and Life Science,Suzhou University of Science and Technology,Suzhou,Jiangsu,215009 China

出　　处：《Chinese Journal of Chemistry》2023年第7期805-813,共9页中国化学（英文版）

基　　金：financial support from the National Natural Science Foundation of China(21871198);the Major Research Project of the Natural Science of the Jiangsu Higher Education Institutions(19KJA360005 and 19KJA320007),and PAPD.

摘　　要：Comprehensive Summary Four heterometallic rare earth(Ⅲ)-cobalt(Ⅱ)complexes(rare earth=Y(1),Sm(2),Nd(3),La(4))stabilized by an o-phenylenediamine-bridged tris(phenolato)ligand(L)have been synthesized and characterized.In these tetranuclear complexes,one polydentate L coordinates to one rare earth(Ⅲ)ion,and one cobalt(Ⅱ)ion,respectively,while two rare earth ions are bridged by four acetate groups.These complexes were applied in the copolymerization of cyclohexene oxide and CO_(2),which showed good activity(TON up to 440)and high poly(cyclohexene carbonate)selectivity(>99%).Kinetic studies determined the equation as rate=k[CHO]1[CO_(2)]0[initiator]1,which proves a first-order dependence on initiator concentrations and implies a synergistic mechanism with rare earth and cobalt ions cooperating in epoxide ring-opening and chain propagation.

关 键 词：Carbon dioxide Rare earth metal Heterometallic complexes Poly(cyclohexene carbonate) Crystal structure 

分 类 号：O62[理学—有机化学]