Cyclic voltammetric study on the effect of the introduction of secondary ligands on the redox behaviour of the copper-saccharin complex

Abstract

The detailed redox behaviour of copper-saccharin (Cu-sac) complex was examined using the cyclic voltammetric technique. It was found that the adsorption process suppresses the Faradaic process of the Cu-sac complex. The effect of the introduction of secondary ligands such as 1,10-phenanthroline (phen), pyridine (py) and bypyridine (bp) on the redox behaviour of the Cu-sac complex in aqueous solution was studied where these ligands contribute on the charge-transfer kinetics of the complex. The heterogeneous charge transfer rate constants are found to follow the order Cu(NO3)2>Cu-sac-bp>Cu-sac>Cu-sac-phen>Cu-sac-py.

Keywords: Copper-saccharin complex, cyclic voltammetry, ligands, redox behaviour.

J.Natn.Sci.Foundation Sri Lanka 2010 38 (2): 91-99

Doi: 10.4038/jnsfsr.v38i2.2033