Počet záznamů: 1

Hoveyda-Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves MCM-41 and SBA-15

  1. 1.
    0358311 - UFCH-W 2012 RIV DE eng J - Článek v odborném periodiku
    Balcar, Hynek - Shinde, Tushar - Žilková, Naděžda - Bastl, Zdeněk
    Hoveyda-Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves MCM-41 and SBA-15.
    Beilstein Journal of Organic Chemistry. Roč. 7, January (2011), s. 22-28 ISSN 1860-5397
    Grant CEP: GA AV ČR IAA400400805; GA AV ČR KAN100400701
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: alkene metathesis * catalyst immobilization * hybrid catalysis
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.517, rok: 2011

    A commercially available Hoveyda-Grubbs type catalyst (RC303 Zhannan Pharma) was immobilized on mesoporous molecular sieves MCM-41 and on SBA-15 by direct interaction with the sieve wall surface. The immobilized catalysts exhibited high activity and nearly 100% selectivity in several types of alkene metathesis reactions. Ru leaching was found to depend on the substrate and solvent used (the lowest leaching was found for ring-closing metathesis of 1,7-octadiene in cyclohexane - 0.04% of catalyst Ru content). Results of XPS, UV-vis and NMR spectroscopy showed that at least 76% of the Ru content was bound to the support surface non-covalently and could be removed from the catalyst by washing with THF.
    Trvalý link: http://hdl.handle.net/11104/0196398