Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity
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 O-2 to the superoxide anion radical (O-center dot(2)-) 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-center dot(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.
Keywords:
Copolymerization / Aniline / Tannic acid / Superoxide anion radical scavenging / Cyclic voltammetrySource:
Electrochimica Acta, 2014, 142, 92-100Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
- Electroconducting and redox-active polymers and oligomers: synthesis, structure, properties and applications (RS-172043)
DOI: 10.1016/j.electacta.2014.07.073
ISSN: 0013-4686
WoS: 000343626400012
Scopus: 2-s2.0-84906658258
Collections
Institution/Community
PharmacyTY - JOUR AU - Janošević-Ležaić, Aleksandra AU - Pasti, Igor AU - Vukomanović, Marija AU - Ćirić-Marjanović, Gordana PY - 2014 UR - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2135 AB - 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 O-2 to the superoxide anion radical (O-center dot(2)-) 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-center dot(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. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity VL - 142 SP - 92 EP - 100 DO - 10.1016/j.electacta.2014.07.073 ER -
@article{ author = "Janošević-Ležaić, Aleksandra and Pasti, Igor and Vukomanović, Marija and Ćirić-Marjanović, Gordana", year = "2014", 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 O-2 to the superoxide anion radical (O-center dot(2)-) 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-center dot(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.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity", volume = "142", pages = "92-100", doi = "10.1016/j.electacta.2014.07.073" }
Janošević-Ležaić, A., Pasti, I., Vukomanović, M.,& Ćirić-Marjanović, G.. (2014). Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 142, 92-100. https://doi.org/10.1016/j.electacta.2014.07.073
Janošević-Ležaić A, Pasti I, Vukomanović M, Ćirić-Marjanović G. Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity. in Electrochimica Acta. 2014;142:92-100. doi:10.1016/j.electacta.2014.07.073 .
Janošević-Ležaić, Aleksandra, Pasti, Igor, Vukomanović, Marija, Ćirić-Marjanović, Gordana, "Polyaniline tannate - Synthesis, characterization and electrochemical assessment of superoxide anion radical scavenging activity" in Electrochimica Acta, 142 (2014):92-100, https://doi.org/10.1016/j.electacta.2014.07.073 . .