Electrochemical and thermal studies of the ternary complex of Cu(II) with saccharin and nicotinamide

Çakır Ş., Bulut I.

Journal of Electroanalytical Chemistry, vol.518, no.1, pp.41-46, 2002 (Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 518 Issue: 1
  • Publication Date: 2002
  • Doi Number: 10.1016/s0022-0728(01)00693-3
  • Journal Name: Journal of Electroanalytical Chemistry
  • Journal Indexes: Scopus
  • Page Numbers: pp.41-46
  • Keywords: Copper, Electrochemistry, Nicotinamide, Saccharin, Spectroscopy, Ternary complex, Thermoanalysis
  • Ondokuz Mayıs University Affiliated: Yes


The electrochemical behaviour and thermal decomposition of a ternary complex of Cu(II) with saccharin and nicotinamide have been investigated by means of voltammetric (square-wave and cyclic voltammetry), spectroscopic and thermoanalysis (TG, DTA, DTG) measurements. The electrochemical data show that the ternary complex undergoes reduction at a more negative potential (-0.310 V) when compared to the binary complexes; Cu(II)-nicotinamide (a shoulder at -0.164 V) and Cu(II)-saccharinate (-0.252 V). ESR spectra (room temperature) of the complex showed a broad signal (g⊥=2.064) due to the weak anti-ferromagnetic coupling between the Cu atoms. ESR and magnetic susceptibility data suggest that the structure of the complex is square-pyramidal in the solid state. The thermal behaviour of the complex from ambient temperature up to 1000°C in a static air atmosphere was studied. The decomposition pathway of the complex is interpreted in terms of the structural data. A possible mechanism for the decomposition of the complex is proposed. © 2002 Published by Elsevier Science B.V.