2011 Fiscal Year Final Research Report
Development of rare earth polymerization catalysts
| Project/Area Number |
22750062
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic chemistry
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
NISHIURA Masayoshi 独立行政法人理化学研究所, 侯有機金属化学研究室, 専任研究員 (30332258)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 希土類アルキル錯体 / スカンジウム / スチレン / ヘプタジエン / ヘキサジエン / イソプレン / 共重合 |
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| Research Abstract |
By using the cationic half-sandwich aminobenzyl scandium complexes, we have achieved for the first time the copolymerization of 1, 5-hexadiene with styrene and terpolymerization of 1, 5-hexadiene with styrene and ethylene to give a new family of polymer materials which possess syndiotactic styrene units, cyclopentyl units and vinyl branch units. By using two different scandium metal catalytic systems, which show syndiospecific selectivity for styrene polymerization and cis-1, 4-selectvity for isoprene and butadiene polymerization, respectively, in the presence of a chain-shuttling agent(triisobutylaluminum), we have achieved for the first time the regio-, and stereospecific chain-shuttling copolymerization of styrene, isoprene and butadiene to give unprecedented multi-block copolymers such as sPS-cis-1, 4-PI-cis-1, 4-PBD with high regio-and stereoselectivity.
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[Journal Article] Syntheses, Structures, and Reactivities of Homometallic Rare-Earth Metal Multimethyl Methylidene and Oxo Complexes2011
Author(s)
J. Hong, L. Zhang, X. Yu, M. Li, Z. Zhang, P. Zheng, M. Nishiura, Z. Hou, X. Zhou
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Journal Title
Chem. Eur. J
Volume: 17
Pages: 2130-2137
Peer Reviewed
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