Hoveyda-Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves-The influence of pore size on the catalyst activity

0375908 - ÚFCH JH 2013 RIV NL eng J - Článek v odborném periodiku
Shinde, Tushar - Žilková, Naděžda - Hanková, V. - Balcar, Hynek
Hoveyda-Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves-The influence of pore size on the catalyst activity.
Catalysis Today. Roč. 179, č. 1 (2012), s. 123-129. ISSN 0920-5861. E-ISSN 1873-4308
Grant CEP: GA AV ČR IAA400400805; GA AV ČR KAN100400701; GA ČR GD203/08/H032
Výzkumný záměr: CEZ:AV0Z40400503
Klíčová slova: olefin metathesis * ring opening metathesis polymerization * Hoveyda-Grubbs catalyst
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 2.980, rok: 2012

New hybrid olefin metathesis catalysts were prepared by immobilization of Hoveyda-Grubbs type catalyst (commercially available as Zhan catalyst-1B) on the surface of mesoporous molecular sieves differing in pore size and architecture (MCM-41, MCM-48, and SBA-15) and conventional silica for a comparison. The activity of these catalysts was tested in RCM of (-)-beta-citronellene, metathesis of 1-decene, ADMET of 1,9-decadiene, and in ROMP of cyclooctene and was found to increase significantly with the increasing pore size of the supports used. In all reactions, the activity of hybrid catalysts based on mesoporous molecular sieves was higher than that of catalyst using conventional silica as a support. In ROMP of cyclooctene, high molecular weight polymer (M-w = 300,000) in high yield (70-80%) was obtained with catalysts based on mesoporous supports, however, only 40% polymer yield was obtained using catalyst based on conventional silica.
Trvalý link: http://hdl.handle.net/11104/0208447