Add time:08/14/2019         Source:sciencedirect.com

Triarylimidazoles have emerged as novel and useful organic redox catalysts as a result of their straightforward synthesis and tunable oxidation potential. Herein we describe an investigation of the effects of supporting electrolyte and solvent on the chemical reversibility of the triarylimidazole redox couple. Next, the homogeneous electron transfer rate for three triarylimidazole mediators toward the oxidation of 4-methoxybenzyl alcohol was estimated using cyclic voltammetry. The results indicate that the concentration and composition of the conducting salts, especially of the anion, affect the electrochemical performance of the triarylimidazole. Kinetic studies reveal that the smaller the peak potential difference between a mediator and the substrate, the larger the catalytic current and the pseudo first-order homogeneous rate constant.

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