Infrared study of acetophenone and 4-methoxyacetophenone adsorbed on titania

Infrared spectra are reported for acetophenone and its 4-methoxy derivative adsorbed on titania. Adsorption involved ligation via carbonyl oxygen atoms to Lewis acidic Ti 4+ sites followed by slow enolisation and subsequent condensation to, for acetophenone, dypnone. Surface carboxylate species were...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 1998-02, Vol.54 (2), p.319-326
Main Authors: Ahmad, Imtiaz, Anderson, James A, Dines, Trevor J, Rochester, Colin H
Format: Article
Language:English
Subjects:
Acetophenone
Adsorption
Surface acidity
Titania
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Summary:Infrared spectra are reported for acetophenone and its 4-methoxy derivative adsorbed on titania. Adsorption involved ligation via carbonyl oxygen atoms to Lewis acidic Ti 4+ sites followed by slow enolisation and subsequent condensation to, for acetophenone, dypnone. Surface carboxylate species were formed at 353 K. Acetophenones are unsatisfactory indicators for testing the Brønsted acid character of oxide surfaces.
ISSN:1386-1425
DOI:10.1016/S1386-1425(97)00232-1