Ionicity-dependent proton-coupled electron transfer of supramolecular self-assembled electroactive heterocycles.

Herein, we investigate the electrochemical properties of a class of Supramolecular Self-associated Amphiphilic salts (SSAs). We show that varying ionic strength of an SSA solution can cause a switching of the thermodynamics and kinetics of electron transfer. The effect of self-assembly on proton-coupled electron transfer has implications for the understanding of electron transfer kinetics in aqueous organic redox flow batteries, especially at high concentration where organic-organic intermolecular interactions become dominant even for highly soluble organic species.