IMPEDANCE STUDIES OF ORGANIC-SYSTEMS IN APROTIC-SOLVENTS

The oxidation of ferrocene and diphenylanthracene (DPA) has been studi ed in aprotic solvents using impedance spectroscopy. Only dichlorometh ane proved to be suited to reproducible measurements. The impedance da ta were analyzed graphically and numerically according to the Randles model of a single electron transfer. The rate constants obtained for t he oxidation of ferrocene and DPA in dichloromethane were 0.67 cm s-1 and 1.8 cm s-1 respectively. The magnitude of the rate constant of fer rocene is in good agreement with reported values from cyclic voltammet ry at ultramicroelectrodes.