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Mono- and Binuclear Cobalt(Ⅱ) Complexes Supported by Quinoline-2- imidate Ligands: Synthesis, Characterization, and 1,3-Butadiene Polymerization 被引量:3

Mono-and Binuclear Cobalt(Ⅱ) Complexes Supported by Quinoline-2-imidate Ligands:Synthesis,Characterization,and 1,3-Butadiene Polymerization
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摘要 A series of mono-and binuclear Co(Ⅱ) complexes (Col-Co7) supported by quinoline-2-imidate ligands were synthesized and thoroughly characterized. Measured by single crystal X-ray crystallography, complexes Col and Co3 adopted distorted tetrahedral structures around the cobalt center. Upon activation by ethylaluminium sesquichloride (EASC), these cobalt complexes exhibited high catalytic activity and cis-l,4-selectivity towards 1,3-butadiene polymerization. The effects of ligand environment, polymerization temperature, and cocatalyst types on the polymerization were investigated in detail. Interestingly, the binuclear Co(Ⅱ) complexes exhibited high thermal stability, and the polymer yields were up to 97.2% even at a high temperature of 70 ℃. A series of mono-and binuclear Co(Ⅱ) complexes (Col-Co7) supported by quinoline-2-imidate ligands were synthesized and thoroughly characterized. Measured by single crystal X-ray crystallography, complexes Col and Co3 adopted distorted tetrahedral structures around the cobalt center. Upon activation by ethylaluminium sesquichloride (EASC), these cobalt complexes exhibited high catalytic activity and cis-l,4-selectivity towards 1,3-butadiene polymerization. The effects of ligand environment, polymerization temperature, and cocatalyst types on the polymerization were investigated in detail. Interestingly, the binuclear Co(Ⅱ) complexes exhibited high thermal stability, and the polymer yields were up to 97.2% even at a high temperature of 70 ℃.
出处 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2018年第8期943-952,共10页 高分子科学(英文版)
基金 financially supported by the National Key R&D Program of China (No.2017YFB0307100 (2017YFB0307103)) National Basic Research Program of China (No.2015CB654700 (2015CB654702))
关键词 Late transition metal Cobalt(Ⅱ) complexes Coordination polymerization POLYBUTADIENE Late transition metal Cobalt(Ⅱ) complexes Coordination polymerization Polybutadiene
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