Citation: Heng Liu, Rui Zhuang, Bo Dong, Feng Wang, Yan-Ming Hu, Xue-Quan Zhang. Mono- and Binuclear Cobalt(II) Complexes Supported by Quinoline-2-imidate Ligands: Synthesis, Characterization, and 1,3-Butadiene Polymerization[J]. Chinese Journal of Polymer Science, ;2018, 36(8): 943-952. doi: 10.1007/s10118-018-2097-8 shu

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

Heng Liu ¹ ,
Rui Zhuang ^1,2 ,
Bo Dong ^1,3 ,
Feng Wang ¹ ,
Yan-Ming Hu ^1,, ,
Xue-Quan Zhang ^1,,

a.
CAS Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
College of Materials Science and Engineering, Jilin University, Changchun 130022, China

Corresponding author: Yan-Ming Hu, ymhu@ciac.ac.cn Xue-Quan Zhang, xqzhang@ciac.ac.cn (X.Q.Z.)
Received Date: 27 October 2017
Accepted Date: 27 November 2017
Available Online: 26 February 2018

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.
- Late transition metal,
- Cobalt(II) complexes,
- Coordination polymerization,
- Polybutadiene
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