Advancing polyethylene properties by incorporating NO2 moiety in 1,2-bis(arylimino)acenaphthylnickel precatalysts: synthesis, characterization and ethylene polymerization

Dalton Transactions : an International Journal of Inorganic Chemistry
Qaiser MahmoodWen-Hua Sun

Abstract

A new family of nickel halides (bromides Ni1-Ni5 and chlorides Ni6-Ni10) ligated by 1-(2,6-dibenzhydryl-4-nitrophenylimino)-2-(arylimino)acenaphthylene (Aryl = 2,6-Me2C6H3L1, 2,6-Et2C6H3L2, 2,6-iPr2C6H3L3, 2,4,6-Me3C6H2L4, and 2,6-Et2-4-MeC6H2L5) have been prepared and well characterized, and the scope of their catalytic properties toward the polymerization of ethylene has been investigated. Upon activation with either Et2AlCl or EASC, the nickel bromide complexes displayed better activities than their nickel chloride counterparts and produced higher-molecular-weight polyethylene in the range of 106 g mol-1 with a very narrow range of molecular weight distributions. In comparison with reference precatalysts with non-nitro substituents (CH3, F or Cl), the title complexes experienced a modest negative effect on catalytic activity upon replacement with a NO2 moiety (activity up to 4.61 × 106 g PE (mol Ni)-1 h-1 at 20 °C). Conversely, the NO2 moiety exerted a positive effect to increase the molecular weight of the resulting polyethylene, and Ni4/Et2AlCl gave polyethylene with a maximum molecular weight of as high as 32.8 × 105 g mol-1, which is not only the highest among the title complexes but also higher than any literature value...Continue Reading

References

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Jul 23, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Jiangang YuWen-Hua Sun
Mar 6, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Shaoliang KongCarl Redshaw
Oct 15, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Erlin YueWen-Hua Sun
Oct 30, 2013·Journal of the American Chemical Society·Jennifer L RhinehartBrian K Long
Dec 25, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Erlin YueWen-Hua Sun
Mar 13, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Shizhen DuWen-Hua Sun
Jul 23, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Fang HuangWen-Hua Sun
Nov 3, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Xinxin WangWen-Hua Sun

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Citations

May 10, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Igor E SoshnikovEvgenii P Talsi
Nov 21, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Randi ZhangWen-Hua Sun
May 28, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Muhammad ZadaWen-Hua Sun
Aug 16, 2018·Royal Society Open Science·Qaiser Mahmood, Wen-Hua Sun
Oct 27, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Hongyi SuoWen-Hua Sun
Jan 9, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Randi ZhangWen-Hua Sun
Jan 19, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Wenhong YangWen-Hua Sun
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Daisuke TakeuchiKohtaro Osakada

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