Abstract
The adsorption of a range of aliphatic mono- and di-carboxylic acids to metal oxides has been investigated using in situ attenuated total reflectance infrared spectroscopy. Thin films of TiO 2, ZrO 2, Al 2O 3, and Ta 2O 5 were prepared by evaporation the aqueous colloid oxides on single reflection ZnSe prisms. Formic and acetic acids were found to bind to ZrO 2 and Ta 2O 5, but showed no adsorption to TiO 2 and Al 2O 3. The dicarboxylic acids, oxalic, malonic, succinic, adipic, maleic, and fumaric acids, were found to adsorb to each of the metal oxide substrates. Oxalic and malonic acids were coordinated via ester linkages involving both carboxylate groups. The longer chain dicarboxylic acids coordinated via bridging bidentate interactions through each carboxylate group.
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Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
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