Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization

Liang Fang; Wen-Peng Zhao; Chun-Yu Zhang; Xue-Quan Zhang; Xian-De Shen; Heng Liu; Toyoji Kakuchi

doi:10.1007/s10118-022-2758-5

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Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization

RESEARCH ARTICLE | Updated：2022-10-25

- Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization
- Chinese Journal of Polymer Science Vol. 40, Issue 11, Pages: 1369-1379(2022)
- Affiliations：
  
  a.Research Center for Polymer Materials, School of Materials Science and Engineering, Changchun University of Science and Technology, Jilin 130022, China
  b.Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266061, China
  c.Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
- Author bio：
  
  shenxiande@cust.edu.cn (X.D.S.)
  hengliu@qust.edu.cn (H.L.)
  kakuchi@eng.hokudai.ac.jp (T.K.)
- Funds：
- DOI：10.1007/s10118-022-2758-5
  CLC：
- Received：03 March 2022，
  
  Revised：2022-4-8，
  
  Accepted：09 April 2022，
  
  Online First：20 July 2022，
  
  Published：01 November 2022
- Accepted：
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Fang, L.; Zhao, W. P.; Zhang, C. Y.; Zhang, X. Q.; Shen, X. D.; Liu, H.; Kakuchi, T. Highly efficient and thermal robust cobalt complexes for 1,3-butadiene polymerization. Chinese J. Polym. Sci. 2022, 40, 1369–1379

Liang Fang, Wen-Peng Zhao, Chun-Yu Zhang, et al. Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization[J]. Chinese Journal of Polymer Science, 2022, 40(11): 1369-1379.
Fang, L.; Zhao, W. P.; Zhang, C. Y.; Zhang, X. Q.; Shen, X. D.; Liu, H.; Kakuchi, T. Highly efficient and thermal robust cobalt complexes for 1,3-butadiene polymerization. Chinese J. Polym. Sci. 2022, 40, 1369–1379 DOI： 10.1007/s10118-022-2758-5.

Liang Fang, Wen-Peng Zhao, Chun-Yu Zhang, et al. Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization[J]. Chinese Journal of Polymer Science, 2022, 40(11): 1369-1379. DOI： 10.1007/s10118-022-2758-5.

摘要

A family of highly bulky bis(salicylaldiminate) Co(II) complexes bearing cavity-like conformations are disclosed. The cobalt center is well protected by the bulky ligand. Ultra-high catalytic efficiency can be revealed at extreme low catalyst concentrations. Thermostabilities of the active species

that give quite high polymer yields at temperature up to 120 °C.

Abstract

A family of highly bulky bis(salicylaldiminate) Co(II) complexes bearing cavity-like conformations are disclosed herein. Due to their unique bulky nature around the cobalt atoms that are reflected from space-filling models and the buried volume percentages

obviously longer bond distances of Co―N and Co―O are revealed from those complexes. Moreover

because of these well-protected active species

the cobalt complexes are able to catalyze 1

3-butadiene polymerization in high yields at extreme low catalyst concentrations

revealing a ultra high catalytic efficiency. At a ratio of 50000

all the complexes can afford polybutadiene with yields higher than 90%. Furthermore

the highly steric bulkiness of the ligand can also significantly enhance the thermostability of the active species. At temperature of 80−120 °C

the complexes are able to successfully maintain high activities

giving polymer yields up to 90%.

关键词

Keywords

references

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