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- W2767683029 endingPage "4464" @default.
- W2767683029 startingPage "4458" @default.
- W2767683029 abstract "A series of xanthene-bridged dinucleating ligands bearing imino- and aminopyridyl moieties and their nickel complexes were synthesized and characterized. The properties of these dinuclear complexes in ethylene polymerization were studied in comparison with the corresponding mononuclear nickel complexes. The iminopyridyl dinuclear nickel complexes activated by methylaluminoxane (MAO) showed higher catalytic activities (up to 2.2 × 106 g of PE (mol Ni)−1 h–1), higher molecular weights, and produced polyethylene with much lower branching density (27/1000C) than their mononuclear analogues. Similar trends were observed for the aminopyridyl dinuclear complexes. A metal–metal cooperativity effect was proposed to be able to slow down the β-hydride elimination and the corresponding chain-walking process. These results clearly demonstrated the great potentials of dinuclear nickel catalysts with the xanthene-bridged coordination modes in controlling the ethylene polymerization process as well as the microstructures..." @default.
- W2767683029 created "2017-11-17" @default.
- W2767683029 creator A5012718640 @default.
- W2767683029 creator A5013022618 @default.
- W2767683029 creator A5030978586 @default.
- W2767683029 creator A5053767534 @default.
- W2767683029 date "2017-11-09" @default.
- W2767683029 modified "2023-09-26" @default.
- W2767683029 title "Ethylene Polymerization by Dinuclear Xanthene-Bridged Imino- and Aminopyridyl Nickel Complexes" @default.
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