INTERACTION OF THE VANADYL(IV) CATION WITH L-ASCORBIC-ACID AND RELATED SYSTEMS

Authors
FERRER EG WILLIAMS PAM BARAN EJ
Citation
Eg. Ferrer et al., INTERACTION OF THE VANADYL(IV) CATION WITH L-ASCORBIC-ACID AND RELATED SYSTEMS, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 53(2), 1998, pp. 256-262
Citations number
35
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
53
Issue
2
Year of publication
1998
Pages
256 - 262
Database
ISI
SICI code
0932-0776(1998)53:2<256:IOTVCW>2.0.ZU;2-F
Abstract
The interaction of VO2+ with L-ascorbic acid and dehydroascorbic acid was investigated by electronic spectroscopy in solution at different p H values. In the case of ascorbic acid, two different solid complexes containing one or two monodeprotonated ascorbate ligands could be isol ated and characterized. With dehydroascorbic acid. interaction begins al pH = 4 but at higher pH values the ligand is hydrolysed irreversibl y, generating 2,3-diketogulonic acid. A solid complex containing this ligand could be precipitated at pH = 7. Its spectroscopic behavior con firms the interaction of the cation with an enolised form of the acid.