Ions/Solvent Exchanges and Electromechanical Processes in Hexasulfonated Calix[6]Arene Doped Polypyrrole Films: Towards a Relaxation Mechanism - Sorbonne Université Access content directly
Journal Articles Electrochemical and Solid-State Letters Year : 2011

Ions/Solvent Exchanges and Electromechanical Processes in Hexasulfonated Calix[6]Arene Doped Polypyrrole Films: Towards a Relaxation Mechanism

Abstract

Electrodeposited polypyrrole films doped with hexasulfonated calix[6]arenes are mainly cation exchangers during electrochemically induced doping/undoping processes in a 0,1 M KNO 3 solution. This is shown here from ion concentrations variations and time constants extracted from ac -electrogravimetry experiments. EIS measurements show that diffusion of ions in the solution is not the rate limiting step in these processes. In parallel, electrochemical AFM investigations revealed correlated swelling/shrinking processes. Actually, ion exchanges imply predictable and fast electromechanical processes that are followed by much slower thickness variations in the opposite direction resulting possibly from conformational relaxation phenomena involving the polymeric chains.

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hal-00826689 , version 1 (28-05-2013)

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Loan To Thi Kim, Claude Gabrielli, Alain Pailleret, Hubert Perrot. Ions/Solvent Exchanges and Electromechanical Processes in Hexasulfonated Calix[6]Arene Doped Polypyrrole Films: Towards a Relaxation Mechanism. Electrochemical and Solid-State Letters, 2011, 14 (11), pp.F9-F11. ⟨10.1149/2.022111esl⟩. ⟨hal-00826689⟩
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