Enolic Schiff Base Zinc Amide Complexes： Highly Active Catalysts for Ring-Opening Polymerization of Lactide and ε-Caprolactone  

作　　者：Chen-Yang Hu Ran-Long Duan Jing-Wei Yang Shu-Jun Dong Zhi-Qiang Sun Xuan Pang Xian-Hong Wang Xue-Si Chen 

机构地区：[1]Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China [2]University of Chinese Academy of Sciences, Beijing 100049, China [3]Department of Materials Science and Engineering, Jilin University, Changchun 130025, China [4]VIP Department, Stomatological Hospital of Jilin University, Changchun 130021, China

出　　处：《Chinese Journal of Polymer Science》2018年第10期1123-1128,共6页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21574124,51503203 and51233004)

摘　　要：A series of zinc silylamido complexes based upon NNO tridentate enolic Schiff base framework have been synthesized and characterized. These complexes were tested for the ring opening polymerization of lactide and e-caprolactone, exhibiting notably high activity at ambient temperature, The influence of imine bridge length and substituents of diketone over the course of polymerization was investigated in details. Remarkably, 4a was confirmed to be a rare example of exceedingly active and robust zinc catalysts, achieving major transformation of lactide under extremely low loading （0.025 mol%） within 18 rain. The influence of various monomers as well as the polymerization mechanism have also been discussed.A series of zinc silylamido complexes based upon NNO tridentate enolic Schiff base framework have been synthesized and characterized. These complexes were tested for the ring opening polymerization of lactide and e-caprolactone, exhibiting notably high activity at ambient temperature, The influence of imine bridge length and substituents of diketone over the course of polymerization was investigated in details. Remarkably, 4a was confirmed to be a rare example of exceedingly active and robust zinc catalysts, achieving major transformation of lactide under extremely low loading （0.025 mol%） within 18 rain. The influence of various monomers as well as the polymerization mechanism have also been discussed.

关 键 词：ZINC Β-DIKETONE Ring-opening polymerization LACTIDE Ε-CAPROLACTONE 

分 类 号：O641.4[理学—物理化学] O643.36[理学—化学]