DOI: 10.1016/j.scib.2019.11.019
论文题名: Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization
作者: Muhammad Q. ; Tan C. ; Chen C.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 4 起始页码: 300
结束页码: 307
语种: 英语
中文关键词: Electronic effect
; Nickel
; Olefin polymerization
; Palladium
; Steric effect
英文关键词: Catalysts
; Copolymerization
; Ethylene
; Ligands
; Nickel
; Palladium
; Catalytic properties
; Electronic effects
; Ethylene polymerization
; Olefin polymerization
; Olefin polymerization catalysts
; Palladium-catalyzed
; Polymer molecular weight
; Steric effect
; Tuning
英文摘要: For transition metal-based olefin polymerization catalysts, ligand steric and electronic effects can strongly influence important catalytic properties. However, the simultaneous tuning of both steric and electronic effects has not been explored in most of the previous studies. In this contribution, a strategy to tune the ligand electronic and steric effects in a concerted fashion is reported. In such a system, both dibenzhydryl groups and multiple methoxy/fluoro groups were installed in α-diimine ligands. In addition to strongly influencing ligand electronics, the methoxy/fluoro groups can interact with the dibenzhydryl groups and efficiently increase ligand sterics. In ethylene polymerization, this concurrent tuning of electronic and steric effects can lead to simultaneous enhancement of several parameters (activity, stability, polymer molecular weight, melting point, branching density) for both the nickel and palladium catalysts. The effectiveness of this strategy is highly attractive for future studies in other catalytic systems. © 2019 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170006
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
Recommended Citation:
Muhammad Q.,Tan C.,Chen C.. Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization[J]. Science Bulletin,2020-01-01,65(4)