TY - JOUR
T1 - Highly active nickel(II) and palladium(II) complexes bearing N,N,P tridentate ligand for vinyl addition polymerization of norbornene
AU - Zhuang, Rui
AU - Liu, Heng
AU - Guo, Jun
AU - Dong, Bo
AU - Zhao, Wenpeng
AU - Hu, Yanming
AU - Zhang, Xuequan
N1 - Funding Information:
This work was supported by National Basic Research Program of China, Grant No. 2015CB654700 (2015CB674702) and Natural Science Foundation of China (No. U1462124).
Publisher Copyright:
© 2017
PY - 2017/8
Y1 - 2017/8
N2 - A series of nickel (II) complexes (1a-4a) and palladium (II) complexes (1b-4b) bearing N,N,P tridentate ligands derived from amino-alkyl phosphines and 2-pyridinecarboxaldehyde and 2-quinolinecarboxaldehyde were synthesized and characterized. X-ray diffraction analysis revealed that complexes 1a, 4a, and 2b adopted square-pyramidal geometry, trigonal bipyramid, and distorted square-planar geometry, respectively. Activated by methylaluminoxane (MAO), all the complexes were highly active for norbornene polymerization in a vinyl addition fashion, affording high molecular weight polymers with narrow molecular weight distributions. The activities of palladium complexes are particularly notable; the highest activity reached 2.45 × 108 g PNB (mol of Ni)−1 h−1. The activities of the complexes were affected by the ligand structure as well as the reaction parameters such as polymerization temperature, time, and cocatalyst loading.
AB - A series of nickel (II) complexes (1a-4a) and palladium (II) complexes (1b-4b) bearing N,N,P tridentate ligands derived from amino-alkyl phosphines and 2-pyridinecarboxaldehyde and 2-quinolinecarboxaldehyde were synthesized and characterized. X-ray diffraction analysis revealed that complexes 1a, 4a, and 2b adopted square-pyramidal geometry, trigonal bipyramid, and distorted square-planar geometry, respectively. Activated by methylaluminoxane (MAO), all the complexes were highly active for norbornene polymerization in a vinyl addition fashion, affording high molecular weight polymers with narrow molecular weight distributions. The activities of palladium complexes are particularly notable; the highest activity reached 2.45 × 108 g PNB (mol of Ni)−1 h−1. The activities of the complexes were affected by the ligand structure as well as the reaction parameters such as polymerization temperature, time, and cocatalyst loading.
KW - Nickel
KW - Norbornene
KW - Palladium
KW - Transition-metal catalysts
KW - Vinyl polymerization
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U2 - 10.1016/j.eurpolymj.2017.06.018
DO - 10.1016/j.eurpolymj.2017.06.018
M3 - Article
AN - SCOPUS:85020730444
SN - 0014-3057
VL - 93
SP - 358
EP - 367
JO - European Polymer Journal
JF - European Polymer Journal
ER -