A comparative spectroelectrochemical study of the redox electrochemistry of nitroanilines |
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Authors: | Abdel Aziz Jbarah Rudolf Holze |
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Institution: | 1. Technische Universit?t Chemnitz, Institut für Chemie, AG Elektrochemie, 09107, Chemnitz, Germany
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Abstract: | The oxidative and reductive electrochemistry of the three isomeric nitroanilines has been studied in neutral (0.1 mol L−1 KClO4) and acidic (0.1 mol L−1 HClO4) aqueous electrolyte solutions by cyclic voltammetry and surface enhanced Raman spectroscopy (SERS). The cyclic voltammograms
recorded for o- and p-nitroanilines with a gold electrode in acidic solution, scanning toward negative potentials, revealed formation of phenylenediamine
not observed in neutral solution. Similar behavior of nitroanilines and phenylenediamines was observed on gold and platinum
electrodes. An oxygen–gold adsorbate stretching mode was detected between 400 and 430 cm−1 in the SER-spectra of the three isomeric nitroanilines in both electrolyte solutions at positive electrode potentials, implying
perpendicular adsorption via the nitro group. |
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Keywords: | Spectroelectrochemistry Nitroanilines Phenylenediamines Electroreduction |
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