Numerical modelling and simulation of Laviron treatment for some phenothiazine modified graphite electrodes

A comparative study of the modeled, simulated and experimental values of kinetic parameters corresponding to six new phenothiazine derivatives of bis-(phenothiazin-3-yl)-phenyl-methane, bis-(10H-phenothiazin-3-yl)-methane (I), a polymer of phenothiazin formaldehyde (II), bis-(10-ethyl-3-phenothiazinyl)-methane (III) and derivatives of (10H-phenothiazin-3-yl)-phenyl-methane (IV,V,VI) adsorbed on spectrographic graphite was investigated. The kinetic parameters (the heterogeneous electron transfer rate constants k_s and transfer coefficients alpha) are calculated using the Laviron treatment, from cyclic voltammetric measurements realized at different potential scan rates. It was obtained a good correlation of calculated kinetic parameters with the experimental values.