DOI: 10.1039/A700284J
(Paper)
J. Chem. Soc., Faraday Trans., 1997, 93, 3191-3196
Gas-phase deposition and thermal transformations of Cr(acac)3 on the surface of alumina supports
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Igor V. Babich, Yuri V. Plyuto, Pascal Van Der Voort and Etienne F. Vansant
Abstract
Gas-phase deposition and subsequent thermal activation of Cr(acac)3 on the surface of fumed and precipitated alumina supports have been studied by diffuse reflectance FTIR spectroscopy, TG–DTG, TPO and chemical analysis. It has been found that stabilisation of Cr(acac)3 on alumina occurs in a molecular form owing to the donor–acceptor interaction of the acetylacetonate ligands with surface hydroxy groups and coordinatively unsaturated Al3+ ions. Thermally activated processes of removal of acetylacetonate ligands assisted by proton transfer and acetylacetonate ligand pyrolysis have been discriminated.