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Synthesis, characterization and ethylene polymerization behaviour of binuclear nickel halides bearing 4,5,9,10-tetra(arylimino)pyrenylidenes

Xing, Qifeng; Song, Kuifeng; Liang, Tongling; Liu, Qingbin; Sun, Wen-Hua; Redshaw, Carl

Authors

Qifeng Xing

Kuifeng Song

Tongling Liang

Qingbin Liu

Wen-Hua Sun

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry



Abstract

Pyrene-4,5,9,10-tetraone was prepared via the oxidation of pyrene, and reacted with various anilines to afford a series of 4,5,9,10-tetra(arylimino)pyrenylidene derivatives (L1–L4). The tetraimino-pyrene compounds L1 and L2 were reacted with two equivalents of (DME)NiBr₂ in CH₂Cl₂ to afford the corresponding dinickel bromide complexes (Ni1 and Ni2). The organic compounds were fully characterized, whilst the bi-metallic complexes were characterized by FT-IR spectra and elemental analysis. The molecular structures of representative organic and nickel compounds were confirmed by single-crystal X-ray diffraction studies. These nickel complexes exhibited high activities towards ethylene polymerization in the presence of either MAO or Me₂AlCl, maintaining a high activity over a prolonged period (longer than previously reported dinickel complex pre-catalysts). The polyethylene obtained was characterized by GPC, DSC and FT-IR spectroscopy and was found to possess branched features.

Citation

Xing, Q., Song, K., Liang, T., Liu, Q., Sun, W., & Redshaw, C. (2014). Synthesis, characterization and ethylene polymerization behaviour of binuclear nickel halides bearing 4,5,9,10-tetra(arylimino)pyrenylidenes. Dalton transactions : an international journal of inorganic chemistry / RSoC, 43(21), 7830-7837. doi:10.1039/c4dt00503a

Journal Article Type Article
Acceptance Date Mar 28, 2014
Online Publication Date Mar 28, 2014
Publication Date Jun 7, 2014
Deposit Date Jun 9, 2015
Publicly Available Date Jun 9, 2015
Journal Dalton transactions
Print ISSN 1477-9226
Electronic ISSN 1477-9234
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 43
Issue 21
Pages 7830-7837
DOI https://doi.org/10.1039/c4dt00503a
Keywords Ethylene polymerization; Binuclear nickel halides
Public URL https://hull-repository.worktribe.com/output/374925
Publisher URL http://pubs.rsc.org/en/Content/ArticleLanding/2014/DT/c4dt00503a#!divAbstract
Additional Information Author's accepted manuscript of article published in: Dalton transactions, 2014, v.43, issue 21.

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