Département de chimie moléculaire

Complexing polymer-coated electrodes were synthesized by oxidative electropolymn. of ethylenediamine tetra-N-(3-pyrrole-1-yl)propylacetamide (monomer L). The presence of four polymerizable pyrrole fragments on the same EDTA skeleton was thought to confer enhanced rigidity and controlled dimensionality to the resulting complexing materials, which were used for the electrochem. detection of Hg(II), Cu(II), Pb(II) and Cd(II) ions by the chem. preconcn.-anodic stripping technique. The polyamide electrode material showed particularly a significant selectivity towards Hg ions, even in the presence of a large excess of other metal cations. Also, the use of imprinted polymer-coated electrodes prepd. by electropolymn. of L in the presence of metal cations turned out to significantly improve the detection limits, down to 5 × 10-10 mol L-1 for Hg(II) and Cu(II) species. [on SciFinder(R)]