气候变化领域集成服务门户(CCPortal): Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization

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DOI	10.1016/j.scib.2019.11.019
	Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization
	Muhammad Q.; Tan C.; Chen C.
发表日期	2020
ISSN	20959273
起始页码	300
结束页码	307
卷号	65 期号:4
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
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
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207150
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
推荐引用方式 GB/T 7714	Muhammad Q.,Tan C.,Chen C.. Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization[J],2020,65(4).
APA	Muhammad Q.,Tan C.,&Chen C..(2020).Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization.Science Bulletin,65(4).
MLA	Muhammad Q.,et al."Concerted steric and electronic effects on α-diimine nickel- and palladium-catalyzed ethylene polymerization and copolymerization".Science Bulletin 65.4(2020).