The reduction mechanism of aromatic nitro compounds in aqueous medium

Cyclic voltammetry and scanning electrochemical microscopy studies of the heterogeneous electron transfer reaction of some nitrosoaromatic compounds

“…In addition, a change on the mechanism from pH 7 to 9 was determined from the E p -pH dependence. All these results are in accordance with those reported by Laviron et al [10], who proposed the following cubic overall mechanism (Scheme 1) for nitrosobenzene electroreduction. The current study deepens in the dilucidation of the electrode kinetics of the nitrosoaromatic derivatives.…”

“…The studies of nitrosoaromatic compounds are usually restricted almost exclusively to nitrosobenzene [10][11][12][13][14]. There is a report, however, on the electrochemical behavior of the photodegradation product of nifedipine, i.e., 2,6-dimethyl-4-(2-nitrosophenyl)-3,5-pyridinecarboxylic acid dimethyl esther [7].…”

The use of silver solid amalgam electrode for voltammetric and amperometric determination of nitroquinolines

“…This potential shift is caused by protonation preceding the rate-determining step of nitro group reduction-the uptake of the second electron as supposed for mercury electrodes [54]. As the inhibition of protonation is increasing with increasing pH, the first peak p 1 c is splitted into two steps at higher pH values and the first step, fast reversible one electron reduction of ArNO 2 to ArNO 2…”

“…(1)). This assumption is based on previous investigations of polarographical reduction of nitroquinolines [50] and other nitro-group containing aromatics [51][52][53][54]:…”

Rapid and Sensitive Voltammetric Determination of Aclonifen in Water Samples

“…This is confirmed by several factors: irreversibility of the signals (both peaks), 30,32 an equal number of electrons and protons involved (both peaks), and shifting of the first signal to more negative potentials with increasing pH. 29,33 Based on these results, we suggest the following electrode reaction pathway: the peak located at -0.65 V represents the reduction of the nitro group to hydroxylamine, and the second signal at -1.15 V is related to the reduction of hydroxylamine to amine (Scheme 2). the peak current was attained up to E SW = 50 mV, which then stabilized, according to theory.…”