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- W2254920207 abstract "3 Abstract A. A. Jbarah Spectroelectrochemistry Of Substituted Anilines The electrochemistry and spectroelectrochemistry of nitroanilines (ortho, meta, and para isomers) and their respective amino compounds (ortho-, metaand paraphenylenediamines) have been investigated at two different electrodes (platinum and gold) and in two different electrolyte solutions (acidic and neutral perchlorate). The results of these investigations were used as a reference for the spectroelectrochemistry of polyvinylamines containing oor p-nitroaniline substituents. Spectroelectrochemical investigations of polyvinylamine containing Wurster radical cation or stilbene as a substituent were also carried out. The oxidative and reductive electrochemistry of the three isomeric nitroanilines has been studied in neutral (0.1 M KClO4) and acidic (0.1 M HClO4) aqueous electrolyte solutions with cyclic voltammetry and Surface Enhanced Raman Spectroscopy (SERS). The cyclic voltammograms recorded with a gold electrode in acidic electrolyte solution showed formation of oand p-phenylenediamine in the negative going potential scan for oand pnitroaniline respectively. In neutral electrolyte solution the situation is different and the final products of electrochemical reduction of these isomers are oand p-amino-Nphenylhydroxylamine. The order of increasing electrochemical oxidation potential is mnitroaniline > p-nitroaniline > o-nitroaniline as observed from cyclic voltammograms recorded with a gold and platinum electrodes and in the positive going potentials scan for these isomers in acidic and neutral electrolyte solutions. An oxygen-gold adsorbate stretching mode was detected between 400 to 430 cm in SER-spectra of the three isomeric nitroanilines in both electrolyte solutions at positive electrode potentials. The SERS experiments showed also a perpendicular orientation of adsorbed nitroanilines on a gold electrode with respect to the metal surface. General trends are observed in the anodic scans of isomeric phenylenediamines at both electrodes and in both electrolyte solutions. The one-electron electrochemical oxidation product (radical cation) in case of oand m-phenylenediamine go into fast C-N coupling" @default.
- W2254920207 created "2016-06-24" @default.
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- W2254920207 date "2006-06-14" @default.
- W2254920207 modified "2023-09-26" @default.
- W2254920207 title "Spectroelectrochemistry of Substituted Anilines" @default.
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