Abstract
Ion association in concentrated aqueous solutions of titanyl sulfate in sulfuric acid has been investigated at 25 degrees C by Raman spectroscopy under conditions like those used in the preparation of titania nanoparticles. Systematic variation of titanyl (M), sulfate (L), and hydrogen ion concentrations and a detailed quantitative analysis of the spectra reveal that two weak titanyl sulfato complexes (ML and ML(2)) are formed, with ML predominating. This assignment conflicts with the recent results of Baillon et al. (J. Mol. Liq. 2008, 143, 8-12).
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