The complex formation equilibria of aspergillic acid with iron(Ill) were studied by potentiometric and spectrophotometric methods. The ligand was prepared by a biosynthetic route and its purity checked by MS and (1)H NMR spectroscopies. Some structural features of the ligand are discussed on the basis of NMR results. The iron(III) coordination model is compared with those of two other cyclic hydroxamates, 1-hydroxy-2-pyridinone and 1,4-dihydroxy-2-pyridinone, and its features are discussed on the basis of quantum chemical calculations. (C) 2008 Elsevier Ltd. All rights reserved.
Interaction between aspergillic acid and iron(III). A potentiometric, UV-Vis, 1H-NMR and quantum chemical study
NURCHI, VALERIA MARINA;CRISPONI, GUIDO;PIVETTA, TIZIANA;TRAMONTANO, ENZO;CESARE MARINCOLA, FLAMINIA;LACHOWICZ, JOANNA IZABELA
2009-01-01
Abstract
The complex formation equilibria of aspergillic acid with iron(Ill) were studied by potentiometric and spectrophotometric methods. The ligand was prepared by a biosynthetic route and its purity checked by MS and (1)H NMR spectroscopies. Some structural features of the ligand are discussed on the basis of NMR results. The iron(III) coordination model is compared with those of two other cyclic hydroxamates, 1-hydroxy-2-pyridinone and 1,4-dihydroxy-2-pyridinone, and its features are discussed on the basis of quantum chemical calculations. (C) 2008 Elsevier Ltd. All rights reserved.
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