ChemElectroChem
ChemElectroChem
5 years ago

A Potentiostatic/Galvanostatic Study and Theoretical Description of Polypyrrole Film Electrodes: A Model of the Intracellular Matrix of Ectothermic Muscle Cells

A Potentiostatic/Galvanostatic Study and Theoretical Description of Polypyrrole Film Electrodes: A Model of the Intracellular Matrix of Ectothermic Muscle Cells
Toribio F. Otero, Samuel Beaumont
Polypyrrole film electrodes are composed of macromolecular electrochemical machines, ions and water. They are considered here as a model of the intracellular matrix of ectothermic muscle cells. The oxidation/reduction responses to the working temperature in aqueous solutions were investigated herein by potential and current steps. Under potentiostatic conditions, rising temperatures stimulate deeper conformational movements of the polymeric chains leading to the exchange of more ions increasing the consumed charge, with the effect that the reaction charge responds and senses the working temperature. Under galvanostatic conditions and higher environmental thermal energies the material potential evolves at lower values during reactions consuming lower electrical energies. At any reaction time, both the consumed reaction energy and the material potential sense the working thermal conditions. Reactions involving molecular machines sense and respond to the working temperature. Similarities with energetic consumptions and sensing responses from muscles in cold-blooded animals are discussed. A theoretical description is proposed. Cold-blooded creatures: Polypyrrole reactions in aqueous solutions drive molecular (polymeric) electrochemical machines mimicking the muscle sarcomere. They sense through the material potential and the reaction energy adapts to the ambient thermal energy. The theoretical description provides hints as to how muscles from ectotherms work and sense temperature.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/celc.201700915

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