A Cyclic Voltammetric Studies of Complexation of Copper (II) with Thymine Using Glassy Carbon Electrode in Aqueous Medium

  • Md. Sohel Rana Department of Chemistry, Chittagong University of Engineering & Technology, Chittagong 4349, Bangladesh
  • Mohammad Arifur Rahman Department of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh
  • A. M. Shafiqul Alam Department of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh

Abstract

Voltammetric behaviors of copper (II) complex with nitrogen bearing nucleobase, thymine (C5H6N2O2), was studied using cyclic voltammetry (CV) on a glassy carbon electrode. Assessment of the chemical and physical conditions that may favor optimum current enhancement was done by studying the effect of variation of concentration of metal and ligand ions, scan rate, step height, pH values and supporting electrolyte as (NH4)2SO4, KCl and NaCl. It was observed that copper and thymine forms a 1:1 ratio complex and increasing the concentration of either metal ion or ligand ion increases the corresponding current. Increasing the scan rate increases the corresponding current linearly with the square root of the scan rate. As the step height decreases the peaks become sharper. Anodic and cathodic current increases linearly with decreasing step height. The highest degree of complexation was observed at pH ranging from 2.3 to 7.0. However, poor complexation was observed in slightly alkaline medium. The complexing order trend of supporting electrolytes was observed as (NH4)2SO4>NaCl>KCl.

Published
Jun 2, 2014
How to Cite
RANA, Md. Sohel; RAHMAN, Mohammad Arifur; ALAM, A. M. Shafiqul. A Cyclic Voltammetric Studies of Complexation of Copper (II) with Thymine Using Glassy Carbon Electrode in Aqueous Medium. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 15, n. 2, p. 7, june 2014. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/155>. Date accessed: 17 dec. 2017.