A Lutetium Allyl Complex That Bears a Pyridyl-Functionalized Cyclopentadienyl Ligand: Dural Catalysis on Highly Syndiospecific and cis-1,4-Selective (Co)Polymerizations of Styrene and Butadiene
文献类型：期刊论文
| 作者 | Jian ZB ; Tang SJ ; Cui DM |
| 刊名 | chemistry-a european journal
 |
| 出版日期 | 2010 |
| 卷号 | 16期号:47页码:14007-14015 |
| 关键词 | SINGLE-SITE CATALYSTS GADOLINIUM TRICARBOXYLATE CATALYST RARE-EARTH-METALS SYNDIOTACTIC POLYSTYRENE STEREOSPECIFIC POLYMERIZATION LANTHANIDE COMPLEXES CRYSTAL-STRUCTURE BLOCK-COPOLYMERS STRUCTURAL-CHARACTERIZATION MOLECULAR-COMPOUND |
| ISSN号 | 0947-6539 |
| 通讯作者 | cui dm |
| 中文摘要 | a novel linked-half-sandwich lutetium-bis(allyl) complex [(c5me4ch5h4n)lu(eta(3)-c3h5)2] (1) attached by a pyridyl-functionalized cyclopentadienyl ligand was synthesized and fully characterized. complex 1 in combination with [ph3c][b(c6f5)(4)] exhibited unprecedented dual catalysis with outstanding activities in highly syndiotactic (rrrr > 99%) styrene polymerization and distinguished cis-1,4-selective (99%) butadiene polymerization, respectively. strikingly, this catalyst system exhibited remarkable activity (396 kg copolymer (mol(lu) h)(-1)) for the copolymerization of butadiene and styrene. irrespective of whether the monomers were fed in concurrent mode or sequential addition of butadiene followed by styrene, diblock copolymers were obtained exclusively, which was confirmed by a kinetics investigation of monomer conversion of copolymerization with time. in the copolymers, the styrene incorporation rate varied from 4.7 to 85.4 mol%, whereas the polybutadiene (pbd) block was highly cis-1,4-regulated (95%) and the polystyrene segment remained purely syndiotactic (rrrr > 99%). correspondingly, the copolymers exhibited glass transition temperatures (t-g) around -107 degrees c and melting points (t-m) around 268 degrees c; typical values for diblock microstructures. such copolymers cannot be accessed by any other methods known to date. x-ray powder diffraction analysis of these diblock copolymers showed that the crystallizable syndiotactic polystyrene (syn-ps) block was in the toluene delta clathrate form. the afm micrographs of diblock copolymer showed a remarkable phase-separation morphology of the cis-1,4-pbd block and syn-ps block. this represents the first example of a lutetium-based catalyst showing both high activity and selectivity for the (co)polymerization of styrene and butadiene. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000286289700018 |
| 公开日期 | 2012-04-25 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/43218]  |
| 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 | Jian ZB,Tang SJ,Cui DM. A Lutetium Allyl Complex That Bears a Pyridyl-Functionalized Cyclopentadienyl Ligand: Dural Catalysis on Highly Syndiospecific and cis-1,4-Selective (Co)Polymerizations of Styrene and Butadiene[J]. chemistry-a european journal,2010,16(47):14007-14015. |
| APA | Jian ZB,Tang SJ,&Cui DM.(2010).A Lutetium Allyl Complex That Bears a Pyridyl-Functionalized Cyclopentadienyl Ligand: Dural Catalysis on Highly Syndiospecific and cis-1,4-Selective (Co)Polymerizations of Styrene and Butadiene.chemistry-a european journal,16(47),14007-14015. |
| MLA | Jian ZB,et al."A Lutetium Allyl Complex That Bears a Pyridyl-Functionalized Cyclopentadienyl Ligand: Dural Catalysis on Highly Syndiospecific and cis-1,4-Selective (Co)Polymerizations of Styrene and Butadiene".chemistry-a european journal 16.47(2010):14007-14015. |
入库方式： OAI收割
来源：长春应用化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。