Tailoring polymers through interplay of ligands within precatalysts: 8-(Nitro/benzhydryl-arylimino)-7,7-dimethyl-5,6-dihydroquinolylnickel halides in ethylene polymerization

	Tailoring polymers through interplay of ligands within precatalysts: 8-(Nitro/benzhydryl-arylimino)-7,7-dimethyl-5,6-dihydroquinolylnickel halides in ethylene polymerization
	Huang, Chuanbing 1,2,3; Zeng, Yanning 1,2; Flisak, Zygmunt 1,2,4; Zhao, Zhijuan 1,2; Liang, Tongling 1,2; Sun, Wen-Hua1,2,3
刊名	JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
	2017-06-15
卷号	55 期号:12 页码:2071-2083
关键词	Homogeneous Catalysis Nickel Nitro Substituent Polymerization Vinylene Group
英文摘要	A series of 8-(nitro/benzhydryl-substituted arylimino)-7,7-dimethyl-5,6-dihydroquinolines and the corresponding nickel halide complexes were synthesized and characterized. Molecular structures of representative nickel complexes were determined by single crystal X-ray diffraction, showing the dinuclear dimers with distorted square-pyramidal geometry around the nickel center. The binding energies determined by X-ray photoelectron spectroscopy (XPS) indicate the effective coordination between the sp(2)-nitrogen and nickel atoms as well as the influence of both the halogen ligands and the substituents within dihydroquinolines on the strength of the NiN bond. Ethylene polymerization with the nickel precatalysts in presence of either methylaluminoxane or diethylaluminum chloride was explored in detail. For the complexes containing the nitro substituent within the organic ligand, the catalytic activity is inversely proportional to the electron density around the nickel core determined by XPS; such phenomenon is consistent with the conclusion of the computational study stating that the activity of precatalysts is correlated with the net charge on the metal center. In the polymerization process, unimodal and branched polyethylenes containing vinyl or vinylene groups were obtained. The nickel precatalysts bearing bulky benzhydryl within the organic ligand as well as bromide rather than chloride attached to the nickel atom produce polymers with relatively large amount of vinylene groups. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2071-2083
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39050]
专题	化学研究所_工程塑料实验室
作者单位	1.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing 100049, Peoples R China 4.Univ Opole, Fac Chem, Oleska 48, PL-45052 Opole, Poland
推荐引用方式 GB/T 7714	Huang, Chuanbing,Zeng, Yanning,Flisak, Zygmunt,et al. Tailoring polymers through interplay of ligands within precatalysts: 8-(Nitro/benzhydryl-arylimino)-7,7-dimethyl-5,6-dihydroquinolylnickel halides in ethylene polymerization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2017,55(12):2071-2083.
APA	Huang, Chuanbing,Zeng, Yanning,Flisak, Zygmunt,Zhao, Zhijuan,Liang, Tongling,&Sun, Wen-Hua.(2017).Tailoring polymers through interplay of ligands within precatalysts: 8-(Nitro/benzhydryl-arylimino)-7,7-dimethyl-5,6-dihydroquinolylnickel halides in ethylene polymerization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,55(12),2071-2083.
MLA	Huang, Chuanbing,et al."Tailoring polymers through interplay of ligands within precatalysts: 8-(Nitro/benzhydryl-arylimino)-7,7-dimethyl-5,6-dihydroquinolylnickel halides in ethylene polymerization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 55.12(2017):2071-2083.