Electrochemical investigation of 4-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid sodium salt (orange II) at glassy carbon electrode

DEMİREL ÖZEL A., Kilic E.

ASIAN JOURNAL OF CHEMISTRY, cilt.20, sa.2, ss.1609-1620, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 2
  • Basım Tarihi: 2008
  • Dergi Adı: ASIAN JOURNAL OF CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1609-1620
  • Anahtar Kelimeler: Orange II, azo dyes, electrochemical behaviour, voltammetry, glassy carbon electrode, electrochemical reduction mechanism, AZO DYES, STRIPPING VOLTAMMETRY, AZOSALICYLIC ACIDS, METAL-COMPLEXES, REDUCTION, BEHAVIOR, POLAROGRAPHY, BACTERIA, AZOREDUCTASE, EQUILIBRIUM
  • Ankara Üniversitesi Adresli: Evet

Özet

The electrochemical behaviour of 4-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid sodium salt (orange II) at glassy carbon electrode in aqueous solutions was investigated. Orange II was found to give a single sharp cathodic CV peak that is found to correspond to a gain of 4 electrons per molecule. The diffusion coefficient was calculated by the aid of chronoamperometric data, the number of electrons transferred was calculated by controlled potential electrolysis and the standard rate constant for the reduction was calculated by Klingler-Kochi technique. From the electrochemical data obtained by using these techniques and thin layer chromatography in aqueous solutions of varying pH, a plausible reduction mechanism of the azo dye was proposed.