Počet záznamů: 1

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

SYSNO ASEP	0360231
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers
Tvůrce(i)	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}
Zdroj.dok.	ACS Catalysis. - : American Chemical Society - ISSN 2155-5435 Roč. 1, č. 7 (2011), s. 709-718
Poč.str.	10 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	Grubbs catalyst ; mesoporous molecular sieves ; olefin metathesis
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
CEP	IAA400400805 GA AV ČR - Akademie věd
	KAN100400701 GA AV ČR - Akademie věd
	GD203/08/H032 GA ČR - Grantová agentura ČR
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000292479400006
DOI	10.1021/cs200090e
Anotace	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.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2012

Počet záznamů: 1