ICCAS OpenIR
Synthesis of vanadium(III) complexes bearing iminopyrrolyl ligands and their role as thermal robust ethylene (co)polymerization catalysts
Mu, Jing-Shan1,2; Wang, Yong-Xia1; Li, Bai-Xiang1; Li, Yue-Sheng1
2011
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume40Issue:14Pages:3490-3497
AbstractBis(imino) pyrrolyl vanadium(III) complexes 2a-e [2,5-C4H2N(CH=NR)(2)]VCl2(THF)(2) [R = C6H5 (2a), 2,6-Me2C6H3 (2b), 2,6-(Pr2C6H3)-Pr-i (2c), 2,4,6-Me3C6H2 (2d), C6F5 (2e)] and bis(iminopyrrolyl) vanadium(III) complex 4f [C4H3N(CH=N-2,6-(PrC6H3)-Pr-i)](2)VCl(THF) have been prepared in good yields from VCl3(THF)(3) by treating with 1.0 and 2.0 equivalent deprotonated ligands in tetrahydrofuran (THF), respectively. These complexes were characterized by FTIR and mass spectra as well as elemental analysis. Structures of 2c and 4f were further confirmed by X-ray crystallographic analysis. DFT calculations indicated the configurations of 2a-e with two nitrogen atoms of the chelating ligand coordinating with vanadium metal centre were more stable in energy. These complexes were employed as catalysts for ethylene polymerization at various reaction conditions. On activation with Et2AlCl, these complexes exhibited high catalytic activities (up to 22.2 kg mmol(-1) (V) h(-1) bar(-1)) even at high temperature, suggesting these catalysts possessed remarkable thermal stability. Moreover, high molecular weight polymer with unimodal molecular weight distributions can be obtained, indicating the polymerization took place in a single-site nature. The copolymerizations of ethylene and 1-hexene with precatalysts 2a-e and 4f were also explored in the presence of Et2AlCl. Catalytic activity, comonomer incorporation, and properties of the resultant polymers can be controlled over a wide range by tuning catalyst structures and reaction parameters.
DOI10.1039/c0dt01650k
Indexed BySCI
Language英语
WOS IDWOS:000288677900009
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71634
Collection中国科学院化学研究所
Corresponding AuthorLi, Yue-Sheng
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Changchun Branch, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Mu, Jing-Shan,Wang, Yong-Xia,Li, Bai-Xiang,et al. Synthesis of vanadium(III) complexes bearing iminopyrrolyl ligands and their role as thermal robust ethylene (co)polymerization catalysts[J]. DALTON TRANSACTIONS,2011,40(14):3490-3497.
APA Mu, Jing-Shan,Wang, Yong-Xia,Li, Bai-Xiang,&Li, Yue-Sheng.(2011).Synthesis of vanadium(III) complexes bearing iminopyrrolyl ligands and their role as thermal robust ethylene (co)polymerization catalysts.DALTON TRANSACTIONS,40(14),3490-3497.
MLA Mu, Jing-Shan,et al."Synthesis of vanadium(III) complexes bearing iminopyrrolyl ligands and their role as thermal robust ethylene (co)polymerization catalysts".DALTON TRANSACTIONS 40.14(2011):3490-3497.
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