Electron Transfer Kinetics in a Deep Eutectic Solvent
Related Experiment Video
Updated: Dec 30, 2025

Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
Fangchen Zhen1, Lucie Percevault1, Ludovic Paquin1
1Univ Rennes , CNRS, ISCR - UMR 6226 , F-35000 Rennes , France.
Abstract:
Electron transfer (ET) kinetic rate constants ks in Ethaline (1:2 choline chloride + ethylene glycol) have been measured for two common redox couples (ferrocene/ferrocenium and ferrocyanide/ferricyanide) on a glassy carbon electrode and compared with ET kinetics in ionic liquids and classical organic solvents in the same conditions (acetonitrile and water). Particular care has been taken to treat ohmic drop in DES. For both couples, we found that ET rate constants are just a little lower than those measured in classical solvents (around 50% or less). These results contrast with ET rates in ionic liquids where electron transfers are considerably slower (100 times lower). Data are discussed as a function of the solvent relaxation time using Marcus Theory for an adiabatic electron transfer.
More Related Videos
Related Concept Videos
E2 Reaction: Kinetics and Mechanism
E1 Reaction: Kinetics and Mechanism
Regioselective Formation of Enolates
E1 Reaction: Stereochemistry and Regiochemistry
Energetics of Solution Formation
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
E2 Reaction: Stereochemistry and Regiochemistry
When a substrate with two different β hydrogens undergoes an E2 elimination, the presence of a strong base can yield two regioisomeric alkenes. The more-substituted alkene is the major...

