Synthesis, spectroscopic and voltammetric studies of a novel dioxovanadate(V) 8-hydroxyquinoline complex
Journal of Coordination Chemistry, vol.55, no.12, pp.1461-1471, 2002 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 55 Issue: 12
- Publication Date: 2002
- Doi Number: 10.1080/0095897021000058853
- Journal Name: Journal of Coordination Chemistry
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.1461-1471
- Keywords: 8-Hydroxyquinoline, Ab initio Calculations, Ammonium trioxovanadate(V), Electronic spectra, FTIR spectra, Oxine, Voltammetry
- Ondokuz Mayıs University Affiliated: Yes
Abstract
A novel solid oxovanadium(V) complex, monoaqua(8-hydroxyquinolinato)dioxovanadium(V), VO2(H2O)(Q) (Q=8-hydroxyquinolinate ion) was synthesized and characterized by FTIR and UV/Vis spectroscopy, voltammetric measurements and Hartree-Fock ab initio calculations on the models of the ligand Q and the respective phenol QH. Electrochemical measurements in solution clearly showed complex formation between NH4VO3 and 8-hydroxyquinoline, revealing an electrode reaction of the intermediate NH4[VO2(Q)OH] species on the mercury electrode in 0.1 M NH3/NH4Cl buffer (pH 9.85) as a reversible process at -0.700 V (vs. Ag | AgCl | KClsat reference electrode). The square-wave voltammogram of an aqueous solution of the VO2(H2O)(Q) complex obtained with thermal deamination of NH4[VO2(Q)OH] presented a new reversible peak at -0.720V.