EIS detection of the partial oxidation of polymers derived from aryl amines

Poly(o-aminophenol) with two redox processes: A spectroelectrochemical study

“…The film is very stable since it does not lose its response after prolonged exposure to air or after repetitive cycling in the supporting electrolyte solution provided that the positive potential scan limit does not exceed E SCE = 0.50 V. However, after cycling for more than a day the polymer starts to show the characteristics of degradation in the form of a marked shift of the cathodic peak towards the negative potential direction in relation to the anodic peak and the appearance of a high-frequency semicircle in the Nyquist diagrams of impedance spectra of the degraded POAP film [30].…”

Spectroelectrochemistry of two-layered composites of polyaniline and poly(o-aminophenol)

“…A rather asymmetric CV response of POAP has been reported [34,[41][42][43][44][45][46] with almost 100 mV difference between the anodic and cathodic peaks depending on the different experimental conditions such as high potential values and different OAP concentration, employed during electropolymerization. However, a symmetric CV with almost 50 mV difference between the anodic and cathodic peaks has been reported elsewhere [47]. The film is very stable since it does not lose its response after prolonged exposure to air or after repetitive cycling in the supporting electrolyte solution.…”

“…The film is very stable since it does not lose its response after prolonged exposure to air or after repetitive cycling in the supporting electrolyte solution. However, after cycling for more than a day the polymer starts to show characteristics of degradation in the form of a marked shift of the cathodic peak towards the negative potential direction in relation to the anodic peak [47]. The dependence of the cyclic voltammograms of the POAP film upon potential scan rate was studied in 0.5 M H 2 SO 4 solution.…”

Novel conducting poly (p-nitro aniline-co-N-methyl aniline): Electrosynthesis, mechanism and in situ spectroelectrochemical characterization

“…1B [28]. The first CVs of NMAn shows the oxidation peak at 1.00 V and two redox peaks at 0.51 and 0.64 V (oxidation) and 0.45 and 0.57 V (redaction) corresponds to the formation of the monomer radicals [34] (Scheme 1A). During the electropolymerization process up to 30 cycles, PNMAn films grows on the electrode surface and the oxidation peaks are observed around 0.56 and 1.00 V. The polymer film can be formed even À0.20 < E vs V (SCE) < 1.00 V potential ranges.…”