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The effect of type of acid sites in molecular sieves on activity and selectivity in acylation reactions

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F07%3A00091838" target="_blank" >RIV/61388955:_____/07:00091838 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The effect of type of acid sites in molecular sieves on activity and selectivity in acylation reactions

  • Original language description

    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.

  • Czech name

    Vliv typu kyselých center molekulových sít na aktivitu a selektivitu acylačních reakcí

  • Czech description

    V acylačních reakcí ferrocenu a toluenu byl zkoumán vliv typu kyselých center (Broenstedova vs. Lewisova) v různých molekulových sítech. Pro reakce byly použity H, Zn, Fe a Al formy zeolitů Beta, USY a mesoporézních molekulových sít (Al)MCM-41 a (Al) a SBA-15. Bylo zjištěno, že přidané kationy působící jako Lewisova kyselá centra zvyšují aktivitu testovaných katalyzátorů. Nebyl nalezen obecně platný vztah mezi typem kationtu a konverzí jednotlivých substrátů. V případě acylace ferrocenu byla nejvyšší aktivita pozorována u Zn-forem, zatímco při acylaci toluenu nejvyšší aktivity vykazovaly Al-formy testovaných molekulových sít.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CF - Physical chemistry and theoretical chemistry

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Collection of Czechoslovak Chemical Communications

  • ISSN

    0010-0765

  • e-ISSN

  • Volume of the periodical

    72

  • Issue of the periodical within the volume

    5-6

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    19

  • Pages from-to

    728-746

  • UT code for WoS article

  • EID of the result in the Scopus database