Abstract
The interaction of the VO2+ cation with the monoisoamyl ester of meso-2,3-dimercaptosuccinic acid (MiADMSA) was investigated by electron absorption spectroscopy in aqueous solutions at different pH values. The spectral behavior, complemented with a spectrophotometric titration, shows the generation of a [VO(MiADMSA)2]4− complex in which the oxocation interacts with two pairs of deprotonated –SH groups of the ester. Besides, MiADMSA rapidly reduces VO −3 to VO2+, which might be chelated by an excess of the ester, and also produces relatively rapid reduction of V2O5 suspensions at pH = 6.5. The results of this study suggest that MiADMSA might be a potentially useful detoxification agent for vanadium.
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Acknowledgements
This work was supported by UNLP and CONICET. J.Z. and E.J.B. are members of the Research Career from this latter organization. P.A.M.W. is a member of the Research Career from CIC-PBA.
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Williams, P.A.M., Zinczuk, J. & Baran, E.J. On the Interaction of Vanadium Species with the Monoisoamyl Ester of Meso-2,3-Dimercaptosuccinic Acid. Biol Trace Elem Res 134, 220–225 (2010). https://doi.org/10.1007/s12011-009-8463-1
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DOI: https://doi.org/10.1007/s12011-009-8463-1