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Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers

SYSNO ASEP	0360231
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers
Author(s)	Bek, David (UFCH-W) Balcar, Hynek (UFCH-W)_{RID, ORCID} Žilková, Naděžda (UFCH-W)_{RID, ORCID} Zukal, Arnošt (UFCH-W)_RID Horáček, Michal (UFCH-W)_{RID, ORCID} Čejka, Jiří (UFCH-W)_{RID, ORCID, SAI}
Source Title	ACS Catalysis. - : American Chemical Society - ISSN 2155-5435 Roč. 1, č. 7 (2011), s. 709-718
Number of pages	10 s.
Language	eng - English
Country	US - United States
Keywords	Grubbs catalyst ; mesoporous molecular sieves ; olefin metathesis
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	IAA400400805 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	KAN100400701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GD203/08/H032 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000292479400006
DOI	10.1021/cs200090e
Annotation	Hybrid catalysts for olefin metathesis were prepared by the immobilization of Ru alkylidenes (Grubbs catalysts) on mesoporous molecular sieves SBA-15 and MCM-41 having the surface modified with molecules bearing dicyclohexylphosphine (PCy2) and pyridine end groups. Hybrid catalysts with Ru attached to the surface via PCy2 ligands exhibited higher activity and stability than those with Ru attached via pyridine ligands. The former catalysts exhibited a high activity in a series of metathesis reactions (RCM, ROMP, and cross-metathesis) reaching turnover numbers (TONs) from 200 to 2000 and being reusable several times. The filtration tests for all catalysts suggested that the solid catalysts were responsible for catalytic activity during the reactions. Only low Ru leaching was observed. A positive effect of the pore size of the support on catalyst activity was observed for the metathesis of methyl oleate.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2012

Number of the records: 1