Studying the kinetics of the ion transfer across the liquid|liquid interface by means of thin film-modified electrodes

The kinetics of the ion transfer across the liquid|liquid interface is studied by means of a thin film-modified electrode in combination with square-wave voltammetry. The thin film-modified electrode consists of an edge plane pyrolytic graphite electrode covered with a thin film of a water immiscible electroinactive organic solvent containing a neutral redox probe and a suitable electrolyte. The overall electrochemical process, proceeding as a coupled electron–ion transfer reaction, is controlled either by the electron transfer across the graphite electrode|organic solvent or by the ion transfer across the organic solvent|aqueous electrolyte interface. The theoretical model enabling to distinguish the rate limiting step is developed. The theory is used to measure the kinetics of ClO4-,NO3-, Cl−, SCN−, Na+, K+, (CH3)4N+, and (C4H9)4N+ across the water|nitrobenzene interface utilizing lutetium bis(tetra-tert-butylphthalocyaninato) as a redox probe. Keywords: Ion transfer kinetics, Liquid–liquid interface, Thin film-modified electrode, Quasireversible maximum, Square-wave voltammetr

Dimerization of a highly unsymmetrical lutetium bisphthalocyanine in solution

International audienceA lutetium heteroleptic bisphthalocyanine, bearing 16 chlorine atoms on one of the two macrocyclic rings and 4 tBu groups on the second phthalocyanine unit, dimerizes in dichloromethane or toluene solutions under ambient condition

Transferts électroniques à une microITIES : influence des potentiels rédox en phase aqueuse

Conférence du 03 au 06 juin 2003. Communication par affiche

Electron transfer at the liquid-liquid interface between Lu(III) bisphtalocyanines in a solvent and Fe(III)/Fe(II) in water. Studies at a micro-interface and at solvent film electrodes

Conférence du 27 avril au 2 mai 2003. Communication orale

Electron transfer at the liquid-liquid interface between Lu(III) bisphtalocyanines in a solvent and Fe(III)/Fe(II) in water. Studies at a micro-interface and at solvent film electrodes

Conférence du 27 avril au 2 mai 2003. Communication orale