Self-assembled monolayers of 2-mercaptobenzimidazole on gold: stripping voltammetric determination of Hg(II) |
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Affiliation: | 1. CETMIC-CCT La Plata, CIC, Camino Centenario y 506, 1897 M. B. Gonnet, Argentina;2. Adscientis, 1 rue A. Kastler, 68310 Wittelsheim, France;3. Pôle Matériaux à Porosité Contrôlée, Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute-Alsace, Université de Strasbourg, 3 rue Alfred Werner, 68093 Mulhouse, France |
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Abstract: | Monomolecular level modification of electrode surfaces through a self-assembly approach is, of late, gaining importance in view of its many functional applications in areas such as molecular electronics, molecular recognition, electron transfer studies and electroanalysis. Self-assembled monolayer (SAM) modification of a gold electrode with 2-mercaptobenzimidazole (MBI) has been achieved. On this modified electrode, anodic stripping voltammetric determination of mercury at ppm/sub-ppm level concentrations has been successfully attempted. Pre-concentration, prior to stripping, has been effected through a non-electrolytic process involving chemical interactions between MBI and Hg(II). The results are described and discussed with a plausible scheme. |
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