The reaction of giant wheel polyoxomolybdate clusters with ethanol

• Autorzy: Bielański A. , Małecka-Lubańska A. , Poźniczek J. , Müller A. , Krickemeyer E. , Diemann E.
• Języki publikacji: EN

Abstrakty

EN

The conversion of ethanol at 100-280° C was used in order to characterise the redox and acid centres present in Na15{0.5[Mo(152)O(457)H14(H(2)O)68] • 0.5[Mo(154)O(462)H(2)14 (H(2)O)(70]}-ca. 400 H(2)O (1). It is concluded that Mo(VI)/Mo pairs at the external surface of the rings, of which the structure of 1 is composed, are the redox centres active in ethanol dehydrogenation to acetaldehyde. Simultaneous ethanol dehydration to diethyl ether or ethylene is a typical reaction occurring on acid centres. It is suggested that OH groups situated in (u3-0)(2)0(2) tetrahedrons inside the ring structure play such role. The formation of ethane predominating at highest temperatures is attributed to secondary reactions of primary ethylene.

Słowa kluczowe

EN

polyoxomolybdate; cluster; ethanol

PL

klaster; molibdenian; etanol

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2001
• Tom: Vol. 49, No. 1
• Strony: 85--99
• Opis fizyczny: Bibliogr. 4 poz.

Twórcy

autor

Bielański A.

autor

Małecka-Lubańska A.

autor

Poźniczek J.

autor

Müller A.

autor

Krickemeyer E.

autor

Diemann E.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 1, 30-239 Kraków, Poland (Instytut Katalizy i Fizykochemii Powierzchni PAN)