"Lewisova acidita mesopor\u00E9zn\u00EDch molekul\u00E1rn\u00EDch s\u00EDt pro acyla\u010Dn\u00ED reakce"@cs . . "5"^^ . "Lewis acidity of mesoporous molecular sieves for acylation reactions" . "The effect of the concentration of Lewis acid sites on the activity and selectivity of different molecular sieve catalysts was investigated in the Friedel-Crafts acylation of ferrocene with acetic anhydride, toluene with isobutyryl chloride, and cyclohexene and 1-methylcyclohexene with propionic anhydride. H-, Zn-, Fe-, Al-, and La-forms of mesoporous molecular sieves (Al)MCM-41 and (Al)SBA-15 were studied and compared with large-pore zeolites. No general relationship between the type of cation and conversion of substrate was found. In acylation of ferrocene the highest ferrocene conversions were reached over Zn- and H-atoms while in toluene acylation Al-forms were the most active. The selectivities over mesoporous molecular sieves were lower (61-89 %) compared with zeolites (82-98 %)."@en . . . "5"^^ . . "10"^^ . . "RIV/61388955:_____/08:00309573" . "Vlk, Josef" . "Singapore" . . . . "Lewis acidity of mesoporous molecular sieves for acylation reactions" . "Proch\u00E1zkov\u00E1, Dana" . . . . . "P(GA104/07/0383), Z(AV0Z40400503)" . . "mesoporous molecular sieves; Lewis acidity; acylation reactions"@en . . "Lewis acidity of mesoporous molecular sieves for acylation reactions"@en . "[B4D436B55415]" . . "World Scientific Publ. Co. Pte. Ltd" . "978-981-277-915-1" . . "The effect of the concentration of Lewis acid sites on the activity and selectivity of different molecular sieve catalysts was investigated in the Friedel-Crafts acylation of ferrocene with acetic anhydride, toluene with isobutyryl chloride, and cyclohexene and 1-methylcyclohexene with propionic anhydride. H-, Zn-, Fe-, Al-, and La-forms of mesoporous molecular sieves (Al)MCM-41 and (Al)SBA-15 were studied and compared with large-pore zeolites. No general relationship between the type of cation and conversion of substrate was found. In acylation of ferrocene the highest ferrocene conversions were reached over Zn- and H-atoms while in toluene acylation Al-forms were the most active. The selectivities over mesoporous molecular sieves were lower (61-89 %) compared with zeolites (82-98 %)." . "\u0160iklov\u00E1, Helena" . "Vancouver" . . . "T\u00E9matem pr\u00E1ce je Lewisova acidita mesopor\u00E9zn\u00EDch molekul\u00E1rn\u00EDch s\u00EDt pro acyla\u010Dn\u00ED reakce."@cs . "Lewis acidity of mesoporous molecular sieves for acylation reactions"@en . . "2008-05-25+02:00"^^ . "Nanoporous Materials" . . "Bejblov\u00E1, Martina" . . . "376685" . "RIV/61388955:_____/08:00309573!RIV09-AV0-61388955" . "Lewisova acidita mesopor\u00E9zn\u00EDch molekul\u00E1rn\u00EDch s\u00EDt pro acyla\u010Dn\u00ED reakce"@cs . "\u010Cejka, Ji\u0159\u00ED" .