Electrochemical Studies of Interaction of Ammonium metavanadate with Geimsa Stain and Pyrazole derivative cyclic voltammetrically | ||
| Mansoura Journal of Chemistry | ||
| Volume 44, Issue 2, May 2020, Pages 32-39 PDF (1.42 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjcc.2020.412977 | ||
| Abstract | ||
| The redox behavior of ammonium metavanadate NH4VO3 alone and on the interaction with Geimsa Stain and Pyrazole derivative via cyclic voltammetry (CV) has been studied. 0.1M H3PO4 was used as supporting electrolyte and NH4VO3 as source for +5 vanadium ions. The cyclic voltammograms gave a quasi-reversible redox couple pattern for +5 to +4 vanadium ions in phosphoric acid medium. The redox behavior of ammonium metavanadate (NH4VO3) was studied by the interaction of Geimsa strain and pyrazole as ligand forming complexes in 0.1 M phosphoric acid. The study indicated that vanadium (+5) is converted to vanadium (+3) via two steps on using potential window range from 1.5Vto -1.5 V (vs./AgCl/KCl(s)).The thermodynamic parameters, stability constant (ks) and Gibbs free energies of complexation (∆Gc) resulted from the interaction of NH4VO3 with both Geimsa stain and Pyrazole derivative ligands gave better results for the interaction of Geimsa Stain than that in case of pyrazole derivative. | ||
| Keywords | ||
| CV; NH4VO3 (AMV); quasireversibility; Complex; Geimsa | ||
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