Synthesis, structural characterization and electrochemical studies switching of MWCNT/novel tetradentate ligand forming metal complexes on PIGE modified electrode by using SWASV

Materials Science & Engineering. C, Materials for Biological Applications
Kumar Sangeetha Selvan, Sangilimuthu Sriman Narayanan

Abstract

A novel sensor of a square wave anodic stripping voltammetric (SWASV) determination of Pb(II) and Cd(II) with a Multiwall carbon nanotube MWCNT/(H2bpabza) novel tetradentate carboxamide ligand modified electrode is reported. The ligand was synthesized and prepared by the condensation of 2-pyridinecarboxylicacid and 2-aminobenzylamine, with triphenylphosphite as the activator and tetrabutylammonium bromide as the reaction medium. The ligand was characterized by UV-Visible spectroscopy, Fourier transform infrared spectroscopy, Raman studies, Nuclear magnetic resonance spectroscopy and scanning electron microscope methods. The ligand was characterized voltammetrically using redox couples Fe(CN)63-/4-, complemented with electrochemical impedance spectroscopy (EIS). The modified electrode has provided an electrochemical sensing platform for simultaneous determination of Pb(II) and Cd(II) ions in 0.1 M acetate buffer solution (ABS) (pH 4.5) have been evaluated. The detection limit of MWCNT/(H2bpabza) modified electrode toward Pb(II) and Cd(II) is 2.7 nM and 0.92 nM, (S/N = 3) respectively. The electrochemical parameters that exert influence on deposition and stripping of metal ions, such as supporting electrolytes, pH value and depos...Continue Reading

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