Gas-phase deposition and thermal transformations of Cr(acac)3 on the surface of alumina supports
- 1 January 1997
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 93 (17) , 3191-3196
- https://doi.org/10.1039/a700284j
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 Al 3+ ions. Thermally activated processes of removal of acetylacetonate ligands assisted by proton transfer and acetylacetonate ligand pyrolysis have been discriminated.Keywords
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