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Vanadium (IV) and vanadium (V) complexes of deferoxamine B in aqueous solution

Buglyó, Péter and Culeddu, Nicola and Kiss, Tamás and Micera, Giovanni and Sanna, Daniele (1995) Vanadium (IV) and vanadium (V) complexes of deferoxamine B in aqueous solution. Journal of Inorganic Biochemistry, Vol. 60 (1), p. 48-59. ISSN 0162-0134. Article.

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DOI: 10.1016/0162-0134(95)00001-5


Complex formation between oxovanadium(IV) and vanadate(V) with deferoxamine B was investigated in aqueous solution by EPR, electronic absorption spectroscopy, 51V NMR, ans pH-potentiometry. The reaction scheme implies that in very acidic media, reversible oxygen displacement occurs on the metal ion to yield nonoxo V(IV) or V(V) complexes, which exhibit distinct EPR and 51V NMR spectral features, respectively. In these species, the bare vanadium ions are coordinated to the three hydroxamic functions of the ligand. With increasing pH, oxo coordination is restored and "normal" VO(IV) and VO2(V) complexes are formed with metal bonding to one or two hydroxamic functions of the ligand.

Item Type:Article
ID Code:1410
Uncontrolled Keywords:Vanadium, deferoxamine B, inorganic chemistry, hydroxamic functions
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto di chimica biomolecolare, Sassari
Publisher:Elsevier Science
Additional Information:Pubblicato online il 5 aprile 2000.
Deposited On:18 Aug 2009 10:05

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