title: On the interaction of vanadium species with the monoisoamyl ester of meso-2,3-dimercaptosuccinic acid.
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 VO3(-) 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.
authors: Centro de Química Inorgánica (CEQUINOR/CONICET, UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. Correo 962, 1900 La Plata, Argentina.
authors: Patricia A M
authors: PA
authors: Williams
authors: Juan
authors: J
authors: Zinczuk
authors: Enrique J
authors: EJ
authors: Baran
mesh_terms: D002614:Chelating Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D004113:Succimer / Q000031:analogs & derivatives* / Q000737:chemistry; D014639:Vanadium / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D014639:Vanadium; C091888:monoisoamyl-2,3-dimercaptosuccinate; D004113:Succimer