Citation: ZHUANG Rui, DONG Bo, ZHAO Wenpeng, HU Yanming, ZHANG Xuequan. Pyridyl/Quinolyl-imine Ni(Ⅱ) Complexes:Synthesis and Application for Preparation of Liquid Polybutadiene[J]. Chinese Journal of Applied Chemistry, ;2017, 34(11): 1259-1264. doi: 10.11944/j.issn.1000-0518.2017.11.170236 shu

Pyridyl/Quinolyl-imine Ni(Ⅱ) Complexes:Synthesis and Application for Preparation of Liquid Polybutadiene

ZHUANG Rui ^a,b ,
DONG Bo ^c ,
ZHAO Wenpeng ^a,b ,
HU Yanming ^a ,
ZHANG Xuequan ^a,,

a.
CAS Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
University of Chinese Academy of Sciences, Beijing 100039, China
c.
College of Materials Science and Engineering, Jilin University, Changchun 130022, China

Corresponding author: ZHANG Xuequan, xqzhang@ciac.ac.cn
Received Date: 5 July 2017
Revised Date: 22 August 2017
Accepted Date: 16 September 2017

Fund Project: the National Basic Research Program of China 2015CB674702Supported by the National Basic Research Program of China(No.2015CB654700, No.2015CB674702)the National Basic Research Program of China 2015CB654700

Figures(4)

The introduction of side arm soft donors(S or P) is an efficient method to improve catalytic performance of the complexes. A series of NNP-tridentate nickel(Ⅱ) complexes bearing pyridyl/quinolyl-imine ligands(2a~2d) was synthesized and characterized by Fourier transform infrared spectroscopy(FTIR) and elemental analysis. X-ray diffraction analysis(XRD) reveals that complexes 2a and 2d adopt square-pyramidal and trigonal bipyramid geometries, respectively. Activated by ethylaluminum sesquichloride(EASC), all complexes are highly active for butadiene polymerization to afford liquid polybutadienes having number-average relative molecular masses of 4200~7700 and medium cis-1, 4 mole fraction(74.5%~79.9%). The ligand has little influence on the catalytic behaviors. The catalytic activity increases with the increment of polymerization temperature, and the catalytic system still exhibits high activity even at 90℃, indicating high thermal stability of the generated active species.
- imine structure,
- NNP-tridentate ligand,
- nickel complex,
- liquid polybutadiene
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