Copolymerization of Ethylene with 1-Hexene and 1-Octene Catalyzed by Fluorenyl N-Heterocyclic Carbene Ligated Rare-Earth Metal Precursors

	Copolymerization of Ethylene with 1-Hexene and 1-Octene Catalyzed by Fluorenyl N-Heterocyclic Carbene Ligated Rare-Earth Metal Precursors
	Yao CG ; Wu CJ ; Wang BL ; Cui DM
刊名	organometallics
	2013
卷号	32 期号:7 页码:2204-2209
关键词	ZIEGLER-NATTA CATALYSTS SINGLE-SITE CATALYSTS ETHYLENE/1-HEXENE COPOLYMERIZATION OLEFIN POLYMERIZATION STYRENE POLYMERIZATION TANDEM ACTION CYCLOPENTADIENYL LIGAND LINKED CYCLOPENTADIENYL SEQUENCE DISTRIBUTIONS BRANCHED POLYETHYLENE
ISSN号	0276-7333
通讯作者	cui dm
中文摘要	rare-earth metal bis(alkyl) complexes (flu-nhc)ln(ch2sime3)(2) (ln = dy (1), er (2), sc (3)) attached by fluorenyl-modified n-heterocyclic carbene ligands ((flu h-nhc-h)br) have been synthesized by treatment of (fluh-nhc-h)br with (trimethylsilylmethyl)lithium (lich2sime3) and rare-earth metal tris(alkyl)s (ln(ch2sime3)(3)(thf)(2)) via double-deprotonation reactions in moderate to high yields. under mild conditions (40 degrees c and normal ethylene pressure), the scandium precursor 3, upon activation of (albu3)-bu-i and [ph3c][b(c6f5)(4)], showed high activity (4120 kg mol(sc)(-1)h(-1) atm(-1)) for the copolymerization of ethylene and 1-hexene with moderate 1-hexene insertion ratio (20.2%), although the analogous complexes 1 and 2 were inert. in addition, this system displayed excellent catalytic performances for the copolymerization of ethylene and a higher alpha-olefin 1-octene with an activity of up to 3640 kg mol(sc)(-1) h(-1) atm(-1). the content of 1-octene could be controlled swiftly from 2.1% to 38.7% by varying the 1-octene feed ratio. thus the isolated p(e-co-oct) polymers varied from opaque crystalline solids with high melting points, e.g., t-m = 103.6 degrees c, to transparent elastomers. this represents the first rare-earth metal based homogeneous catalyst that can initiate the copolymerization of ethylene and 1-octene, the catalytic performances of which are comparable with those reported for the most active group 4 metallocene systems.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000317370000022
公开日期	2014-04-16
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49924]
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	Yao CG,Wu CJ,Wang BL,et al. Copolymerization of Ethylene with 1-Hexene and 1-Octene Catalyzed by Fluorenyl N-Heterocyclic Carbene Ligated Rare-Earth Metal Precursors[J]. organometallics,2013,32(7):2204-2209.
APA	Yao CG,Wu CJ,Wang BL,&Cui DM.(2013).Copolymerization of Ethylene with 1-Hexene and 1-Octene Catalyzed by Fluorenyl N-Heterocyclic Carbene Ligated Rare-Earth Metal Precursors.organometallics,32(7),2204-2209.
MLA	Yao CG,et al."Copolymerization of Ethylene with 1-Hexene and 1-Octene Catalyzed by Fluorenyl N-Heterocyclic Carbene Ligated Rare-Earth Metal Precursors".organometallics 32.7(2013):2204-2209.