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Article Dans Une Revue Journal of Physical Chemistry B Année : 2020

Electron Transfer Kinetics in a Deep Eutectic Solvent

Résumé

Electron transfer (ET) kinetic rate constants k in Ethaline (12 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.
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Dates et versions

hal-02472164 , version 1 (29-05-2020)

Identifiants

Citer

Fangchen Zhen, Lucie Percevault, Ludovic Paquin, Emmanuelle Limanton, Corinne Lagrost, et al.. Electron Transfer Kinetics in a Deep Eutectic Solvent. Journal of Physical Chemistry B, 2020, 124 (6), pp.1025-1032. ⟨10.1021/acs.jpcb.9b09022⟩. ⟨hal-02472164⟩
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