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

Semiha Çakir, Ender Biçer, Panče Naumov, Osman Çakir

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)1461-1471
Number of pages11
JournalJournal of Coordination Chemistry
Volume55
Issue number12
DOIs
StatePublished - Dec 1 2002

Keywords

  • 8-Hydroxyquinoline
  • Ab initio Calculations
  • Ammonium trioxovanadate(V)
  • Electronic spectra
  • FTIR spectra
  • Oxine
  • Voltammetry

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry

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