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Issue 15, 2008
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The grounds for the activity of TPAP in oxidation catalysis in supercritical carbon dioxide when confined in hybrid fluorinated silica matrices

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Abstract

Fluorinated organo-silica gels doped with tetra-n-propylammonium perruthenate (TPAP) are excellent catalysts for the aerobic oxidative dehydrogenation of alcohols in supercritical CO2 (scCO2). Their activity and stability are subtly dictated by structure, depending on the degree of fluorination and on the length of the fluoroalkyl chain linked to the silica network. Such dependence reflects the hydrophilic–hydrophobic balance (HHB) of the matrix, as evaluated by diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. The remarkable correlation between the materials’ HHB and reactivity provides a finding of general validity for reaction-controlled mechanisms, which opens the route to the synthesis of second generation sol–gel entrapped catalysts for the production of fine chemicals in scCO2.

Graphical abstract: The grounds for the activity of TPAP in oxidation catalysis in supercritical carbon dioxide when confined in hybrid fluorinated silica matrices

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Publication details

The article was received on 24 Oct 2007, accepted on 19 Dec 2007 and first published on 31 Jan 2008


Article type: Paper
DOI: 10.1039/B716405J
Citation: Phys. Chem. Chem. Phys., 2008,10, 2026-2032
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    The grounds for the activity of TPAP in oxidation catalysis in supercritical carbon dioxide when confined in hybrid fluorinated silica matrices

    A. Fidalgo, R. Ciriminna, L. M. Ilharco, S. Campestrini, M. Carraro and M. Pagliaro, Phys. Chem. Chem. Phys., 2008, 10, 2026
    DOI: 10.1039/B716405J

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