Stereoselective Polymerization of Styrene with Cationic Scandium Precursors Bearing Quinolyl Aniline Ligands

	Stereoselective Polymerization of Styrene with Cationic Scandium Precursors Bearing Quinolyl Aniline Ligands
	Liu DT ; Luo YJ ; Gao W ; Cui DM
刊名	organometallics
	2010
卷号	29 期号:8 页码:1916-1923
关键词	RING-OPENING POLYMERIZATION N HALF-SANDWICH COMPLEXES O MULTIDENTATE LIGANDS EARTH-METAL ALKYL SYNDIOTACTIC-SPECIFIC POLYMERIZATION SINGLE-SITE CATALYSTS SYNDIOSPECIFIC POLYMERIZATION LACTIDE POLYMERIZATION STEREOSPECIFIC POLYMERIZATION ISOPRENE POLYMERIZATION
ISSN号	0276-7333
通讯作者	cui dm
中文摘要	the novel n-r-quinolinyl-8-amino ligands hl1-5 (r = 2,6-me2c6h3 (hl1), 2,4,6-me3c6h2 (hl2), 2,6-et2c6h3 (hl3), 2,6-(pr2c6h3)-pr-i (hl4), c6h5 (hl5)) reacted with sc(ch2sime3)(3)(thf)(2) to afford the well-defined complexes (l1-5)sc(ch2sime3)(2)(thf) (1-5), which were fully characterized by nmr spectral and x-ray diffraction analyses. complexes 1-3 combined with organoborates to establish binary systems that exhibited high activity for the polymerization of styrene, while 4 was less active and 5 was almost inert. the cationic complex [(lsc)-sc-1(ch2sime3)(dme)(2)][b(c6f5)(4)] (6) was successfully isolated by treatment of 1 with [phme2nh][b(c6f5)(4)], and represents probably the structural model of the initiation active species. remarkably, upon addition of aluminum trialkyls to the binary systems, distinguished improvement in catalytic performances was achieved, among which the ternary system 1/5al(i)bu(3)/[ph3c][b(c6f5)(4)] displayed the highest activity (1.56 x 10(6) g mol(-1) h(-1)) and syndioselectivity (r = 0.94) via a chain-end control mechanism governed by the concerted steric effect of the ligand and the aluminum alkyls. this represents the first non-cyclopentadienyl stabilized rare-earth metal based catalyst showing both high activity and specific selectivity for the polymerization of styrene, which might shed new light on designing more efficient precursors and further investigation of the mechanism for this polymerization.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000276692100010
公开日期	2012-06-06
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/43774]
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	Liu DT,Luo YJ,Gao W,et al. Stereoselective Polymerization of Styrene with Cationic Scandium Precursors Bearing Quinolyl Aniline Ligands[J]. organometallics,2010,29(8):1916-1923.
APA	Liu DT,Luo YJ,Gao W,&Cui DM.(2010).Stereoselective Polymerization of Styrene with Cationic Scandium Precursors Bearing Quinolyl Aniline Ligands.organometallics,29(8),1916-1923.
MLA	Liu DT,et al."Stereoselective Polymerization of Styrene with Cationic Scandium Precursors Bearing Quinolyl Aniline Ligands".organometallics 29.8(2010):1916-1923.