B. Speiser, A. Rieker, S. Pons
May 25, 1983
Citations
0
Influential Citations
19
Citations
Journal
Journal of Electroanalytical Chemistry
Abstract
Abstract A general scheme for the electro-oxidation of anilines is outlined. The oxidation of 2,6-di-tert-butyl-4-R-aninlines (R=phenyl, p -methoxyphenyl and p -dimethylaminophenyl) in the first oxidation wave is investigated with electroanalytical techniques (chronoamperometry, chronopotentiometry and cyclic voltammetry). The anilines are oxidized in a reversible one-electron trasfer to the corresponding stable radical cations, which are examined by cyclic voltammetry and ESR spectroscopy. Modulated specular reflectance spectroscopy (MSRS) is performed during the oxidation of these anilines as well as 2,4,6-tritert-butyl-aniline, to yield the UV/VIS spectra of the radical cations. Recording of transient reflectance signals and open circuit relaxation experiments further substantiate the conclusion that a reversible electron transfer without a chemical follow-up reaction occurs in the case of the former three anilines. The 2,4,6-tri-tert-butyl-aniline radical cation, however, decays in a slow (pseudo) first-order reaction.