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

Year: 2011

Type: article

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.

Source: Electrochemical and Solid-State Letters

DOI: 10.1149/2.022111esl

Authors: L. T. T. Kim, C. Gabrielli, A. Pailleret, H. Perrot

Institutions: Centre National de la Recherche Scientifique, Laboratoire Interfaces et Systèmes Électrochimiques, Université Pierre-et-Marie-Curie

Language: English

Topic: Conducting polymers and applications

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W2146325452

FWCI: 2.059

Cites: 17

Cited by: 14

Related to: 10