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

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. 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. (en)
Title	Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers (en)
skos:prefLabel	Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers (en)
skos:notation	RIV/61388955:_____/11:00360231!RIV12-GA0-61388955
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GD203/08/H032), P(IAA400400805), P(KAN100400701), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	7
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Horáček, Michal Zukal, Arnošt Čejka, Jiří Balcar, Hynek Bek, David Žilková, Naděžda
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	201593
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/11:00360231
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Grubbs catalyst; mesoporous molecular sieves; olefin metathesis (en)
http://linked.open.../riv/klicoveSlovo	Grubbs catalyst mesoporous molecular sieves olefin metathesis
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[354482AD96FB]
http://linked.open...i/riv/nazevZdroje	ACS Catalysis
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Advanced immobilized metathesis catalysts for fine chemical synthesis Hybride nanocomposite materials Advanced catalytic processes and materials
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	1
http://linked.open...iv/tvurceVysledku	Zukal, Arnošt Čejka, Jiří Horáček, Michal Balcar, Hynek Bek, David Žilková, Naděžda
http://linked.open...ain/vavai/riv/wos	000292479400006
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	2155-5435
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1021/cs200090e

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