Benzosuberyl Substituents as a "Sandwich-like" Function in Olefin Polymerization Catalysis

Yu-Yin Wang; Chao-Qun Wang; Xiao-Qiang Hu; Yan Xia; Yue Chi; Yi-Xin Zhang; Zhong-Bao Jian

doi:10.1007/s10118-021-2562-7

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Benzosuberyl Substituents as a "Sandwich-like" Function in Olefin Polymerization Catalysis

ARTICLE | Updated：2021-04-30

- Benzosuberyl Substituents as a "Sandwich-like" Function in Olefin Polymerization Catalysis
- Benzosuberyl Substituents as a "Sandwich-like" Function in Olefin Polymerization Catalysis
- Chinese Journal of Polymer Science 2021年39卷第8期页码：984-993
- Affiliations：
  
  a.College of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
  b.Key Laboratory of Advanced Structural Materials of Ministry of Education, College of Material Science and Engineering, Changchun University of Technology, Changchun 130012, China
  c.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Author bio：
  
  yuechi@ccut.edu.cn (Y.C.)
  zhangyixin@ciac.ac.cn (Y.X.Z.)
  zbjian@ciac.ac.cn (Z.B.J.)
- Funds：
  
  We thank financial support from the National Natural Science Foundation of China (Nos. 21871250 and 22001244) and the Jilin Provincial Science and Technology Department Program (No. 20200801009GH).
- DOI：10.1007/s10118-021-2562-7
  中图分类号：
- 收稿：2021-01-14，
  
  修回：2021-2-5，
  
  录用：2021-2-9，
  
  网络首发：2021-04-30，
  
  纸质出版：2021-06-18
- Accepted：
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Wang, Y. Y.; Wang, C. Q.; Hu, X. Q.; Xia, Y.; Chi, Y.; Zhang, Y. X.; Jian, Z. B. Benzosuberyl substituents as a "sandwich-like" function in olefin polymerization catalysis. Chinese J. Polym. Sci. 2021, 39, 984–993

Yu-Yin Wang, Chao-Qun Wang, Xiao-Qiang Hu, et al. Benzosuberyl Substituents as a "Sandwich-like" Function in Olefin Polymerization Catalysis[J]. Chinese Journal of Polymer Science, 2021, 39(8): 984-993.
Wang, Y. Y.; Wang, C. Q.; Hu, X. Q.; Xia, Y.; Chi, Y.; Zhang, Y. X.; Jian, Z. B. Benzosuberyl substituents as a "sandwich-like" function in olefin polymerization catalysis. Chinese J. Polym. Sci. 2021, 39, 984–993 DOI： 10.1007/s10118-021-2562-7.

Yu-Yin Wang, Chao-Qun Wang, Xiao-Qiang Hu, et al. Benzosuberyl Substituents as a "Sandwich-like" Function in Olefin Polymerization Catalysis[J]. Chinese Journal of Polymer Science, 2021, 39(8): 984-993. DOI： 10.1007/s10118-021-2562-7.

摘要

Abstract

For the rational design of metal catalyst in olefin polymerization catalysis

various strategies were applied to suppress the chain transfer by bulking up the axial positions of the metal center

among which the ”sandwich” type turned out to be an efficient category in achieving high molecular weight polyolefin. In the

-diimine system

the “sandwich” type catalysts were built using the typical 8-aryl-naphthyl framework. In this contribution

by introducing the rotationally restrained benzosuberyl substituent into the

ortho

-position of

-aryl rings

a new class of “sandwich-like”

-diimine nickel catalysts was constructed and fully identified. The rotationally restrained benzosuberyl substituents played a “sandwich-like” function by capping the nickel center from two axial sites. Compared to the nickel catalyst

Ni1

bearing freely rotated benzhydryl substituent

Ni2

featuring benzosuberyl substituent enabled the increase (8 times) of polymer molecular weights from 8 kDa to 65 kDa in the polymerization of ethylene. By further increasing the steric bulk of another

ortho

-site of the

-aryl ring

the polymer molecular weight even reached an ultrahigh level of 833 kDa (

=1857 kDa) using the optimized

Ni3

. Notably

these nickel catalysts could also mediate the copolymerization of ethylene with methyl 10-undecenoate

with

Ni3

giving the highest copolymer molecular weight (88 kDa) and the highest incorporation of comonmer (2.0 mol%)

along with high activity of up to 10

g·mol

−1

·h

−1

关键词

Keywords

references

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