. . "CZ - \u010Cesk\u00E1 republika" . . . "Vlk, J." . "Vliv typu kysel\u00FDch center molekulov\u00FDch s\u00EDt na aktivitu a selektivitu acyla\u010Dn\u00EDch reakc\u00ED"@cs . "72" . "P(GA104/07/0383), P(GD203/03/H140), Z(AV0Z40400503)" . . . "0010-0765" . "V acyla\u010Dn\u00EDch reakc\u00ED ferrocenu a toluenu byl zkoum\u00E1n vliv typu kysel\u00FDch center (Broenstedova vs. Lewisova) v r\u016Fzn\u00FDch molekulov\u00FDch s\u00EDtech. Pro reakce byly pou\u017Eity H, Zn, Fe a Al formy zeolit\u016F Beta, USY a mesopor\u00E9zn\u00EDch molekulov\u00FDch s\u00EDt (Al)MCM-41 a (Al) a SBA-15. Bylo zji\u0161t\u011Bno, \u017Ee p\u0159idan\u00E9 kationy p\u016Fsob\u00EDc\u00ED jako Lewisova kysel\u00E1 centra zvy\u0161uj\u00ED aktivitu testovan\u00FDch katalyz\u00E1tor\u016F. Nebyl nalezen obecn\u011B platn\u00FD vztah mezi typem kationtu a konverz\u00ED jednotliv\u00FDch substr\u00E1t\u016F. V p\u0159\u00EDpad\u011B acylace ferrocenu byla nejvy\u0161\u0161\u00ED aktivita pozorov\u00E1na u Zn-forem, zat\u00EDmco p\u0159i acylaci toluenu nejvy\u0161\u0161\u00ED aktivity vykazovaly Al-formy testovan\u00FDch molekulov\u00FDch s\u00EDt."@cs . "Bejblov\u00E1, Martina" . "5-6" . . . . "The effect of type of acid sites in molecular sieves on activity and selectivity in acylation reactions" . "Proch\u00E1zkov\u00E1, Dana" . . . "\u0160iklov\u00E1, Helena" . "Vliv typu kysel\u00FDch center molekulov\u00FDch s\u00EDt na aktivitu a selektivitu acyla\u010Dn\u00EDch reakc\u00ED"@cs . "[67E4CAF54A99]" . "RIV/61388955:_____/07:00091838!RIV08-AV0-61388955" . "419171" . "The effect of type of acid sites in molecular sieves on activity and selectivity in acylation reactions"@en . "RIV/61388955:_____/07:00091838" . . "4"^^ . "The role of the type of acid site (Broensted vs. Lewis) on the activity and selectivity of molecular sieve catalysts was investigated in ferrocene and toluene acylation. H-, Zn-, Fe-, Aland La-forms of zeolite Beta, USY and mesoporous molecular sieves (Al) MCM-41, (Al) SBA-15 were tested. It was observed that addition of metal cations acting as Lewis acid sites can increase the acidity of various molecular sieve catalysts. No general relationship between the type of cation and conversion of individual substrate was found. While the highest activity in ferrocene acylation was observed after addition of Zn, in the case of toluene acylation Al-forms of catalysts were the most active. The results indicate that the acid strength of cationic Lewis sites controls their activity in acylation reactions."@en . . . "728;746" . "19"^^ . . . . . "The effect of type of acid sites in molecular sieves on activity and selectivity in acylation reactions" . . . "molecular sieves; catalysis; zeolites"@en . "Collection of Czechoslovak Chemical Communications" . "5"^^ . "\u010Cejka, Ji\u0159\u00ED" . "The effect of type of acid sites in molecular sieves on activity and selectivity in acylation reactions"@en . . "The role of the type of acid site (Broensted vs. Lewis) on the activity and selectivity of molecular sieve catalysts was investigated in ferrocene and toluene acylation. H-, Zn-, Fe-, Aland La-forms of zeolite Beta, USY and mesoporous molecular sieves (Al) MCM-41, (Al) SBA-15 were tested. It was observed that addition of metal cations acting as Lewis acid sites can increase the acidity of various molecular sieve catalysts. No general relationship between the type of cation and conversion of individual substrate was found. While the highest activity in ferrocene acylation was observed after addition of Zn, in the case of toluene acylation Al-forms of catalysts were the most active. The results indicate that the acid strength of cationic Lewis sites controls their activity in acylation reactions." .