| Mono-and Binuclear Cobalt(Ⅱ) Complexes Supported by Quinoline-2-imidate Ligands:Synthesis,Characterization,and 1,3-Butadiene Polymerization |
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| 作者单位： | CAS Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
CAS Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;University of Chinese Academy of Sciences, Beijing 100049, China
CAS Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;College of Materials Science and Engineering, Jilin University, Changchun 130022, China |
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| 摘 要： | A series of mono-and binuclear Co(II) complexes(Co1–Co7) supported by quinoline-2-imidate ligands were synthesized and thoroughly characterized.Measured by single crystal X-ray crystallography,complexes Co1 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-1,4-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 °C.
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| 关 键 词： | Late transition metal Cobalt(Ⅱ) complexes Coordination polymerization Polybutadiene Late transition metal Cobalt(Ⅱ) complexes Coordination polymerization Polybutadiene |
Mono- and Binuclear Cobalt(II) Complexes Supported by Quinoline-2-imidate Ligands: Synthesis,Characterization, and 1,3-Butadiene Polymerization |
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| Authors: | Heng Liu Rui Zhuang Bo Dong Feng Wang Yan-Ming Hu Xue-Quan Zhang |
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| Institution: | 1.CAS Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,China;2.University of Chinese Academy of Sciences,Beijing,China;3.College of Materials Science and Engineering,Jilin University,Changchun,China |
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| Abstract: | A series ofmono-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 ℃. |
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