Electrochemically induced free solvent transfer in thin poly(3, 4-ethylenedioxythiophene) films. (10th May 2015)

• Record Type: Journal Article
• Authors: Agrisuelas, J.; Gabrielli, C.; García-Jareño, J.J.; Perrot, H.; Sel, O.; Vicente, F.
• Is Part Of: Electrochimica acta. Volume 164(2015)
• Page Start: 21
• Page End: 30
• Publication Date: 2015-05-10
• Subjects: Poly(3, 4-ethylenedioxythiophene) -- Electrochemical quartz crystal microbalance -- Electrochemical impedance spectroscopy -- ac-Electrogravimetry -- Electrochemically induced conformational changes; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.02.133
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: In dynamic intrinsically conducting films, counterions transfer and conformational movements stimulated by the electrochemical reactions affect the free water molecules transfer. Poly(3, 4-ethylenedioxythiophene) or PEDOT is included in this category. Here, p-doping of PEDOT immersed in LiClO4 aqueous solution was explored by ac -electrogravimetry. Electrochemical impedance spectroscopy combined with mass impedance spectroscopy proves useful for species identification and kinetics. For PEDOT, new equations have been developed to analyze the ac -electrogravimetry response. Quantitatively, faster free water transfer and slower coupled C l O 4 − /free water transfer were separated. Free water transfer plays a key role as a "fingerprint" of conformational movements. This might respond to fundamental questions about the mechanism of PEDOT as well as their implication in technological devices based on this polymer.