Rare-earth metal bis(alkyl)s that bear a 2-pyridinemethanamine ligand: Dual catalysis of the polymerizations of both isoprene and ethylene
文献类型：期刊论文
| 作者 | Jian ZB ; Cui DM |
| 刊名 | dalton transactions
 |
| 出版日期 | 2012 |
| 卷号 | 41期号:8页码:2367-2373 |
| 关键词 | YTTRIUM ALKYL COMPLEXES OLEFIN POLYMERIZATION ETHENE POLYMERIZATION ORGANOYTTRIUM CATIONS LIVING POLYMERIZATION NEODYMOCENE CATALYST METHYL COMPLEXES ALPHA-OLEFINS COPOLYMERIZATION SCANDIUM |
| ISSN号 | 1477-9226 |
| 通讯作者 | cui dm |
| 中文摘要 | new pyridinemethanamido-ligated rare-earth metal bis(alkyl) complexes [c5h4n-ch(me)nc6h3(pr-i)(2)] ln(ch2sime3)(2)(thf) (ln = sc (1), y (2), lu (3)) have been prepared at 0 degrees c via a protonolysis reaction between rare-earth metal tris(alkyl)s and the corresponding 2-pyridinemethanamine ligand and fully characterized by nmr and x-ray diffraction analysis. bis(alkyl) complexes 1-3 are analogous monomers of thf solvate, where the ligand bonds to the metal center in a kappa n: kappa n-bidentate mode. complexes 1-3, in combination with [ph3c][b(c6f5)(4)], showed a good activity towards isoprene polymerization to give polyisoprene with a main 3,4-selectivity (60%-66%); in particular the yttrium catalyst system, 2/[ph3c][b(c6f5)(4)], displayed a living mode. by contrast, only the precatalyst 2 exhibited activity for isoprene polymerization in the presence of [phnme2h][ b(c6f5) 4]. the influence of alkylaluminium (alr3, r = me, et, bu-i) and the metal center on the polymerization of isoprene was also studied, and it was found that addition of alme3 to the catalyst systems could lead to a dramatic change in the microstructure of the polymer from 3,4-specific to 1,4-selective (89%-95%), but the ionic radius of the central metal had little influence on the selectivity. in addition, by using the 1(sc)/[ph3c][b(c6f5)(4)]/10 (albu3)-bu-i, the polymerization of ethylene was also achieved with moderate activity (up to 3.2 105 g (pe) mol(sc)(-1) h(-1) bar(-1)) and narrow polydispersity (m-w/m-n = 1.19-1.28); while the effect of temperature on the activity was discussed. such dual catalysis for the polymerizations of both isoprene and ethylene is rare. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000300186100021 |
| 公开日期 | 2013-06-30 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/48641]  |
| 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,Cui DM. Rare-earth metal bis(alkyl)s that bear a 2-pyridinemethanamine ligand: Dual catalysis of the polymerizations of both isoprene and ethylene[J]. dalton transactions,2012,41(8):2367-2373. |
| APA | Jian ZB,&Cui DM.(2012).Rare-earth metal bis(alkyl)s that bear a 2-pyridinemethanamine ligand: Dual catalysis of the polymerizations of both isoprene and ethylene.dalton transactions,41(8),2367-2373. |
| MLA | Jian ZB,et al."Rare-earth metal bis(alkyl)s that bear a 2-pyridinemethanamine ligand: Dual catalysis of the polymerizations of both isoprene and ethylene".dalton transactions 41.8(2012):2367-2373. |
入库方式： OAI收割
来源：长春应用化学研究所
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