Polarographic and voltammetric investigation of 8-hydroxy-7-(4-sulfo-1-naphthylazo)-5-quinoline sulfonic acid

Menek N., Karaman Y.

DYES AND PIGMENTS, cilt.67, sa.1, ss.9-14, 2005 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 67 Sayı: 1
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.dyepig.2004.10.002
  • Dergi Adı: DYES AND PIGMENTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.9-14
  • Anahtar Kelimeler: azo, polarography, voltammetry, reaction mechanism, CATHODIC STRIPPING VOLTAMMETRY, ELECTROCHEMICAL-BEHAVIOR, AZO DYES, METAL-COMPLEXES, ELECTRODE
  • Ondokuz Mayıs Üniversitesi Adresli: Hayır

Özet

The behaviour at HMDE and SMDE of 8-hydroxy-7-(4-sulfo-l-naphthylazo)-5-quinolinesulfonic acid has been studied by several techniques including Square wave voltammetry (SWV), Differential pulse plarography (DPP), Direct current polarography (DCP) and Cyclic voltarnmetry (CV). Current-potential curves recorded at HMDE and SNIDE electrode provide information on electrode reaction mechanism. The reduction of a pre-protonated azo group involving a four-electron process and two peaks or waves, gives amine derivatives in acidic solutions. In alkaline solution the reduction process occurs at more negative potential with the formation of a stable hydrazo compound. The electrochemical reduction mechanism of the azo compound is suggested using SWV, DPP, DCP and CV techniques in aqueous solutions of varying pH. (c) 2004 Elsevier Ltd. All rights reserved.