Electrochemical behaviour of nitroindoles: oxidative electropolymerization and reduction of the nitro group of polymerized and non-polymerized 4-nitro and 5-nitroindole

The Influence of Ad‐atom Adsorption on Reaction Rates and Mechanisms

“…As in the case of oxygen reduction, a bridge adsorption of the nitro group with a bridge complex involving a substrate (Au) and an adsorbed atom (M = Pb, Tl) was assumed to explain the strong chemisorption on Au partially covered by ad-atoms. Analogous behavior was also observed with the other heterocyclic nitro compounds [60,61].…”

“…The reduction involves adsorption of reactants and intermediates and follows direct electron-exchange mechanism on most cathodes except of platinum, in which the reduction proceeds by an electrocatalytic hydrogenation mechanism. The influence of ad-atoms on the reduction of nitro and nitroso compounds on Ag, Au, and Pt electrodes has been studied during the last two decades [55][56][57][58][59][60][61]. It was found that ad-atom layers of Pb, Tl, and Bi deposited at underpotentials have a strong influence on the performance of the above substrates for the nitro and nitroso group electroreduction, both in terms of the improvement of the catalytic activity and the catalytic selectivity of these electrodes.…”

“…Tl ad-atoms, deposited on Au in the underpotential region, exert pronounced catalytic effects on the reduction of some N -heterocyclic nitro compounds [56,60,61].…”

Effect of substituent position on electrodeposition, morphology, and capacitance performance of polyindole bearing a carboxylic group

“…Currently, there are many indole derivatives containing functional groups such as -NO 2 [25,26], -CN [27,28], -COOH [29], -Br [30], -Cl [31], -F [31], -CH 3 [32,33], -OCH 3 [34], -C 6 H 5 [35], -CHO [36] and -NH 2 [37,38], which can be polymerized into the polyindoles family. Among polyindole derivatives, the carboxylic substituent on polyindole benefits the formation of nanowires possibly due to the hydrogen bond interactions [39], and may lead to the higher capacitance and the better cycling stability relative to unmodified polyindole [40,41].…”

Synthesis and characterization of fluorescent nitrobenzoyl polythiophenes

“…Therefore, the properties can be adjusted by modification of the monomer structure by attaching different functional groups, such as, electron-donating and/or electronwithdrawing, n-dopable, or fluorescent substituents [10][11][12][13]. For instance, the appendage of a nitro group on the monomer structure would make the resulting polymers amenable for use in sensors or electrochemical capacitors [14,15].…”