Ferric Reducing Antioxidant Power (FRAP) assay is a measure of assessment of the total antioxidant power of compounds. In this study, the ability of homo and copolymer of Aniline (Ani) and Pyrrole (Py) to act as an antioxidant on ferric ion reduction is investigated. The oxidative homo and copolymerization on composite 2B pencil graphite were accomplished in citric acid medium containing calcium chloride (CaCl 2) as the supporting electrolyte by cyclic voltammetry method. The morphology and structural analysis of homo and copolymer was confirmed by SEM and FTIR. The FTIR and UV-visible spectra indicated that the increase of aniline monomer in the copolymer chain enhances the ferric ion reduction ability. The electrochemical impedance spectroscopy (EIS) is used for further investigation. It was revealed that the increase of aniline ring in polymeric chain decreased the charge transfer resistance (Rct) and thus increases the reduction effect and improved the free radical scavenging activity of copolymers.
In this study, homo and copolymer of Aniline (Ani) and Pyrrole (Py) was electrosynthesized on composite graphite in acetic acid medium containing KCl as supporting electrolyte. The ability of electrosynthesized homo and copolymer on ferric ion reduction was compared and evaluated. The results show that the reduction properties of polyaniline (PAni) is greater than copolymer of aniline and pyrrole (Poly(Ani-co-Py)) and copolymer is more than polypyrrol (PPy). The FTIR and UV-visible spectra indicated that the increase of aniline monomer in the copolymer chain enhances the ferric ion reduction ability. Electrochemical Impedance Spectroscopy (EIS) was also used for further investigation. It was shown that the increase of aniline ring in the copolymer chain reduces the charge-transfer resistance and thus increases the reduction effect. The structure and morphology of homo and copolymer was confirmed by SEM, EDX and FTIR.
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