Highly active and cis-1,4 selective polymerization of 1,3-butadiene catalyzed by cobalt(II) complexes bearing alpha-diimine ligands

	Highly active and cis-1,4 selective polymerization of 1,3-butadiene catalyzed by cobalt(II) complexes bearing alpha-diimine ligands
	Jia XY ; Liu H ; Hu YM ; Dai QQ ; Bi JF ; Bai CX ; Zhang XQ
刊名	chinese journal of catalysis
	2013
卷号	34 期号:8 页码:1560-1569
关键词	BUTADIENE POLYMERIZATION DIENE POLYMERIZATION COORDINATION POLYMERIZATION CONJUGATED DIENES STEREOSPECIFIC POLYMERIZATIONS BLOCK-COPOLYMERIZATION MOLECULAR-WEIGHT CHAIN TRANSFER SYSTEM ISOPRENE
ISSN号	0253-9837
通讯作者	zhang xq
中文摘要	a series of cobalt(ii) complexes bearing alpha-diimine ligands were synthesized and characterized by elemental and spectroscopic analysis. these complexes had the general formulas [arn=c(me)-(me)c=nar]cocl2 (ar = c6h5, 3a; 4-mec6h4, 3b; 4-meoc6h4, 3c; 4-fc6h4, 3d; 4-clc6h4, 3e; 2-mec6h4, 3f; 2-etc6h4, 3g; 2-(prc6h4)-pr-i, 3h; 2,4,6-me3c6h2, 3i; 2,6-et2c6h3, 3j; 2,6-(prc6h3)-pr-i, 3k). 2,6-bis[(2,6-diisopropylphenylimino)ethyl]pyridine cocl2 (4a) was also synthesized for comparison. the structures of complexes 3i, 3k, and 4a were further analyzed by x-ray crystallography. when the co(ii) complexes were activated with ethylaluminum sesquichloride, they exhibited high catalytic activity for 1,3-butadiene polymerization. the polymers produced have high cis-1,4 stereoregularity (up to 98.0%) and high molecular weights (m-n = 1 x 10(4)-1 x 10(5)). the substituent ligand affected both catalytic activity and stereoselectivity through an electronic effect while steric hindrance by the substituent was not important the effects of the polymerization conditions, such as polymerization time, temperature, different alkylaluminum compounds used as cocatalyst, and [al]/[co] molar ratio, on polymerization behavior were investigated. (c) 2013, dalian institute of chemical physics, chinese academy of sciences. published by elsevier b.v. all rights reserved.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000323239600012
公开日期	2014-04-15
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49695]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Jia XY,Liu H,Hu YM,et al. Highly active and cis-1,4 selective polymerization of 1,3-butadiene catalyzed by cobalt(II) complexes bearing alpha-diimine ligands[J]. chinese journal of catalysis,2013,34(8):1560-1569.
APA	Jia XY.,Liu H.,Hu YM.,Dai QQ.,Bi JF.,...&Zhang XQ.(2013).Highly active and cis-1,4 selective polymerization of 1,3-butadiene catalyzed by cobalt(II) complexes bearing alpha-diimine ligands.chinese journal of catalysis,34(8),1560-1569.
MLA	Jia XY,et al."Highly active and cis-1,4 selective polymerization of 1,3-butadiene catalyzed by cobalt(II) complexes bearing alpha-diimine ligands".chinese journal of catalysis 34.8(2013):1560-1569.