Diffusion of redox active molecules in deep eutectic solvents

Stéphanie Fryars 1 Emmanuelle Limanton 1 Fabienne Gauffre 1 Ludovic Paquin 1 Corinne Lagrost 1 Philippe Hapiot 1
1 ISCR - Institut des Sciences Chimiques de Rennes
Abstract : Classical electrochemical approaches were evaluated for investigating the basic properties of deep eutectic solvents (DES) with a special focus on the mass transport phenomena and diffusion of charged species in DES. Three classical DES were considered: Reline, Ethaline and choline chloride-lactic acid mixture. Cyclic voltammetries of the ferrocene oxidation and of the ferricyanide reduction, respectively with charge 0 and − 3, exhibit well-defined responses in these media. For all considered DES and redox molecules, diffusion processes govern the mass-transport of the redox molecules from the solution to the electrode. Derived diffusion coefficients were extracted and found to present some inconsistencies with the classical Stokes-Einstein law for homogeneous media. The diffusion coefficients were found to be almost unaffected by the charge present on the diffusing molecules contrarily to observations made for ionic liquids.
Keywords : Cyclic voltammetry Redox probes Deep eutectic solvents Diffusion coefficients
Document type :
Journal articles
Complete list of metadatas
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01812103
Contributor : Laurent Jonchère <>
Submitted on : Monday, June 11, 2018 - 11:24:57 AM
Last modification on : Sunday, December 23, 2018 - 7:04:37 PM
Long-term archiving on : Wednesday, September 12, 2018 - 11:16:16 PM

File

Fryars -Diffusion of redox act...
Files produced by the author(s)

Identifiers

Collections

UNIV-RENNES1 | SCR_MACSE | INC-CNRS | ISCR | UNIV-RENNES | UR1-UFR-SPM | ISCR-CORINT | INSA-RENNES | INSA-GROUPE

Citation

Stéphanie Fryars, Emmanuelle Limanton, Fabienne Gauffre, Ludovic Paquin, Corinne Lagrost, et al.. Diffusion of redox active molecules in deep eutectic solvents. Journal of Electroanalytical Chemistry, Elsevier 2018, 819, pp.214-219. ⟨10.1016/j.jelechem.2017.10.030⟩. ⟨hal-01812103⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

129

Files downloads

148