Investigation of Electrochemical Behavior of 4-(2-Pyridylazo)resorcinol and its Cu2+ Complex by Using Polarographic and Voltammetric Techniques

Karaman Y., Menek N.

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, vol.16, no.8, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 8
  • Publication Date: 2021
  • Doi Number: 10.20964/2021.08.06
  • Journal Name: INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Metadex, Civil Engineering Abstracts
  • Keywords: Azo dye, reduction, reaction mechanism, metal complex, CATHODIC STRIPPING VOLTAMMETRY, CARBON-PASTE ELECTRODE, VINYLSULPHONE AZO-DYE, SPECTROPHOTOMETRIC DETERMINATION, SCHIFF-BASES, CU(II), DERIVATIVES, COPPER(II), SURFACTANT, REDUCTION
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

In this work, the electrochemical behavior of 4-(2-pyridylazo)resorcinol (PAR) azo dye was studied in Britton-Robinson (BR) buffer (pH 2.0-12.0) media by employing square wave voltammetry (SWV), differential pulse polarography (DPP), direct current polarography (DCP) and cyclic voltammetry (CV) techniques. From the polarographic and voltammetric results, the electrochemical reaction mechanism of the azo dye has been proposed. At the same time, the electrochemical behavior of the copper(II) complex with PAR was investigated by using SWV in 0.1 M KNO3 supporting electrolyte. SWV behavior of Cu(II)-PAR complex at different metal and ligand concentrations have been determined in KNO3 supporting electrolyte media. The metal:ligand molar ratio and stability constant of the Cu(II)-PAR complex were determined to be 1:2 and 5.42x10(10), respectively.