Journal
ELECTROCHIMICA ACTA
Volume 52, Issue 9, Pages 3082-3087Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2006.09.041
Keywords
functionalized polypyrrole; imprinted polymer; stripping voltammetry; competitive complexation; metal ions analysis
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Complexing polymer-coated electrodes have been synthesized by oxidative electropolymerization of NM-ethylenebis[N-[(3-(pyrrole-1-yl)propyl) carbamoyl) methyl]-glycine] (L). There were used for the electrochemical detection of Cu(II), Pb(II) and Cd(II) ions by means of the chemical preconcentration-anodic stripping technique. For thick polymeric binding materials and long accumulation times, competitive experiments showed that the polyL film modified electrodes are selective towards Cu(II) ions and particularly insensitive to the presence of Cd(II). In contrast, imprinted polymer-coated electrodes prepared by electropolymerization of the Cd(II) complex of L allowed an efficient complexation and sensing of Cd(IT) cations. The selectivity of the molecular electrode materials can thus be subtly modulated upon playing on the accumulation time and on the pre-structuration of the complexing polymers. (c) 2006 Elsevier Ltd. All rights reserved.
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