80电影天堂网,少妇高潮一区二区三区99,jαpαnesehd熟女熟妇伦,无码人妻精品一区二区蜜桃网站

Links
Contact Info.
  • Address:福建省福州市閩侯縣上街鎮(zhèn)福建農(nóng)林大學(xué)旗山校區(qū)
  • Zip:350108
  • Tel:18502093393
  • Fax:
  • Email:liaogf@fafu.edu.cn
Current Location :> Home > Publications > Text
22-Thermally robust α-diimine nickel and palladium catalysts with constrained space for ethylene (co)polymerizations
writer:Liu Zhong, Handou Zheng, Cheng Du, Wenbo Du, Guangfu Liao, Chi Shing Cheung, and Haiyang Gao*
keywords:Nickel and palladium catalystsSteric effectEthylene polymerizationPolar monomer
source:期刊
specific source:https://doi.org/10.1016/j.jcat.2020.02.022
Issue time:2020年
The axial and equatorial plane model has been widely accepted for α-diimine nickel and palladium catalysts of olefins polymerization. In this paper, dinaphthobarrelene backbone-based α-diimine nickel and palladium complexes with the constrained space were designed and synthesized from the viewpoint of three-dimensional (3D) space. The 3D-constrained microenvironment around the Ni/Pd metal center created by the bulky ligand substituents fully shielded the back and axial sites, which improved catalytic activity, thermal stability, and living fashion of catalysts. Additionally, enhanced tolerance towards polar groups in copolymerization of ethylene and polar monomers was realized by dinaphthobarrelene-derived α-diimine nickel and palladium catalysts.