Département de chimie moléculaire

Complexing polymer-coated electrodes were synthesized by oxidative electropolymn. of N,N'-ethylenebis[N-[(3-(pyrrole-1-yl)propyl) carbamoyl Me]-glycine] (L). There were used for the electrochem. detection of Cu(II), Pb(II) and Cd(II) ions by the chem. preconcn.-anodic stripping technique. For thick polymeric binding materials and long accumulation times, competitive expts. showed that the polyL film modified electrodes are selective towards Cu(II) ions and particularly insensitive to the presence of Cd(II). But imprinted polymer-coated electrodes prepd. by electropolymn. of the Cd(II) complex of L allowed an efficient complexation and sensing of Cd(II) cations. The selectivity of the mol. electrode materials can thus be subtly modulated upon playing on the accumulation time and on the pre-structuration of the complexing polymers. [on SciFinder(R)]