Electropolymerization of phenol and aniline derivatives: Synthesis, characterization and application as electrochemical transducers

Publication date: Available online 17 May 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Cátia da Cruz Santos, Thiago Coimbra Pimenta, Ronaldo Luis Thomasini, Rodrigo Moreira Verly, Diego Leoni Franco, Lucas Franco FerreiraAbstractIn this work we synthesized, characterized (electrochemically, morphologically and structurally) and proposed an electropolymerization mechanism to obtain polymer films derived from 4-aminobenzoic acid (4-ABA), 4-aminobenzamide (4-ABZ), 4-hydroxybenzoic acid (4-HBA) and 4-hydroxybenzamide (4-HBZ) to be used as electrochemical transducers applied to the initial development of an immunosensor for dengue. The electropolymerization of these monomers over graphite electrodes (GE) in 0.5 M sulfuric acid solution was obtained using cyclic voltammetry (CV), and applying 100 potential cycles at 50 mV/s. The characterization of the polymeric films was performed by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), cyclic voltammetry, and electrochemical impedance spectroscopy (EIS). All the polymer films obtained showed adsorption on the surface of the GE, and showed electrochemical activity in the potential region of 0.3 to 0.8 V. SEM images proved the modification of the graphite electrodes surfaces by the polymeric films with specific morphological characteristics for each polymeric film. FTIR and NMR analysis show the presence of C–O–C bond for the poly(4-HBA) and ...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research