Electrosynthesis of conducting poly(o-aminophenol) films on Pt substrates: a combined electrochemical and XPS investigation

EQCM and XPS investigations on the redox switching of conducting poly(o-aminophenol) films electrosynthesized onto Pt substrates

“…7 and Table 3 show the wide spectra (7A) and detailed regions (7B) acquired for the oxidized PoAP together with fitting results. The analog XPS characterization of the reduced PoAP (potential scan stopped at the reducing potential of -0.2 V) has already been reported by the authors [16].…”

“…The results of this analysis have been combined with the important aspects coming from the XPS investigation of PoAP in different redox states. The film in the reduced state has already been characterized by the authors [16]. Relying on those results, here we focused our spectroscopic characterization on the partially oxidized and oxidized PoAP.…”

“…In order to avoid any influence from the exposure to X-ray irradiation and from the ultra-high vacuum conditions present in the analysis chamber, the characterization of the two redox states was carried out on different polymers grown onto Pt substrate by employing exactly the same experimental conditions. This was possible thanks to the reproducibility of the electrosynthesis procedure already testified by the XPS characterization of PoAP in the reduced state [16]. The corresponding modified electrodes were rinsed with water, dried under nitrogen and then analyzed ex situ by XPS.…”

The chemical and electrochemical oxidative polymerization of 2-amino-4-tert-butylphenol

“…The main role corresponds unambigously to aromatic carbon, while the 285.9 eV contribution can be assigned to aromatic carbon bound to either amine or imine neutral nitrogen and also to oxygen-containing ether structures in the form of phenoxazine [25,26], which are not discerneable. The binding energy of the negligible peak at 287.8 eV is probably too high to correspond to a carbonyl environment [27] and, consequently, it can be assigned better to a π-π* shake-up transition from the C 1s parent peak involving benzenoid rings.…”

Thermodynamic study of the electrochemical oxidation of some aminophenol derivatives: Experimental and theoretical investigation

“…Electrochemical oxidation of aminophenols at various conditions was studied by numerous workers [11][12][13][14][15]. Also electrochemical oxidation of aminophenols in the presence of different nucleophiles indicates that final products were produced via various mechanisms such as EC, ECE, ECEC, ECECCE and ECECEC [16][17][18][19][20].…”