Synthesis, spectroscopic and voltammetric studies of a novel dioxovanadate(V) 8-hydroxyquinoline complex

Çakir S., Biçer E., Naumov P., Çakir O.

Journal of Coordination Chemistry, cilt.55, sa.12, ss.1461-1471, 2002 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55 Sayı: 12
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1080/0095897021000058853
  • Dergi Adı: Journal of Coordination Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1461-1471
  • Anahtar Kelimeler: 8-Hydroxyquinoline, Ab initio Calculations, Ammonium trioxovanadate(V), Electronic spectra, FTIR spectra, Oxine, Voltammetry
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

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.