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Please use this identifier to cite or link to this item: https://dspace.ffh.bg.ac.rs/handle/123456789/97
Title: Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity
Authors: Janošević Ležaić, Aleksandra
Pašti, Igor 
Vukomanović, Marija
Ćirić-Marjanović, Gordana 
Keywords: Aniline;Copolymerization;Cyclic voltammetry;Superoxide anion radical scavenging;Tannic acid
Issue Date: 1-Oct-2014
Journal: Electrochimica Acta
Abstract: 
Polyaniline tannate (PANI-TA) solid microspheres were synthesized by the external-template-free oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in aqueous solution of tannic acid (TA). Syntheses were performed using fixed mole ratio [TA]/[aniline] and varying [APS]/[aniline] mole ratios and polymerization times. PANI-TA materials were characterized by scanning and transmission electron microscopies, FTIR and Raman spectroscopies, elemental microanalysis and conductivity measurements, and their structure and properties were compared. The ability of PANI-TA microspheres to act as antioxidants was investigated by cyclic voltammetry using the electrocatalytical reduction of O2 to the superoxide anion radical ( •O2-) and analyzing the evolution of the electrochemical response upon successive addition of PANI-TA as a radical scavenger. All synthesized materials showed very good •O 2- scavenging activity. It was shown that the scavenging activity of PANI-TA can be tuned by the conditions of its synthesis, thus leading to the material showing higher antioxidant activity than pure TA. Observed differences in radical scavenging activities of PANI-TA materials were discussed. © 2014 Published by Elsevier Ltd.
URI: https://dspace.ffh.bg.ac.rs/handle/123456789/97
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2014.07.073
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University of Belgrade
Faculty of Physical Chemistry
Studentski trg 12-16
11158 Belgrade 118
PAC 105305
SERBIA
University of Belgrade Faculty of Physical Chemistry