Electrochemical and X-ray photoelectron spectroscopic investigations of conductive polymers

• Published in: Ionics Vol. 26; no. 2; pp. 831 - 838
• Main Authors: Waware, Umesh Somaji, Arukula, Ravi, Hamouda, A. M. S., Kasak, Peter
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2020; Springer Nature B.V
• Subjects: Aniline; Backbone; Chain branching; Chemical composition; Chemical synthesis; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Conducting polymers; Copolymers; Current density; Electrochemistry; Energy Storage; Optical and Electronic Materials; Organic chemistry; Original Paper; Photoelectrons; Polyanilines; Polymers; Renewable and Green Energy; Single electrons; X ray photoelectron spectroscopy; Poly(aniline-co-o-hydroxyaniline); Polyaniline; XPS and cyclicvoltametry
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-019-03250-8

We report the synthesis of high soluble poly(aniline-co-o-hydroxyaniline) copolymers with varying the amount of o-hydroxyaniline (20, 40, 60, and 80 %) and referred as PA-co-o-HA20, PA-co-o-HA40, PA-co-o-HA60, and PA-co-o-HA80 respectively. The chemical and structural composition of the polymers and copolymers were determined by XPS, UV–Vis, and FE-SEM analysis. Electrochemical studies of the as-prepared polymers showed two single-electron oxidations and two single-electron reductions reversibly at various scan rates ranging from 20 to 50 mV and results reveals that the current density of the copolymer was lesser than the conventional polyaniline (PA). This is due to increasing the hydroxyl (-OH) branching on the polymer backbone in the polymer chain. The current density decreases from PA-co-o-HA20 to PA-co-o-HA80 by increasing the weight percentage of o-hydroxyaniline in the polymeric backbone.