Films of 1100 EW Nation were prepared by casting the Nation solution on the electrodes surfaces were soked in cationic metal complex solutions tr introduce the complexes and stuied cyclicvoltammetry(CV), UV-Vis spectroelectrochemical and electrochemic...
Films of 1100 EW Nation were prepared by casting the Nation solution on the electrodes surfaces were soked in cationic metal complex solutions tr introduce the complexes and stuied cyclicvoltammetry(CV), UV-Vis spectroelectrochemical and electrochemical quartz crystal microbalance (EQCM) techniques.
Co(sep)^3+ was revealed not to be incorporated into the Nafion coatings in the detection limit of CV and spectroelectrochemical method and it was rendered due to highly symmetric charge distribution of Co(sep)^3+ and great acidity of the complex. When Os(bPy)_3^2+ incorporated Nation coatings were studied by EQCM technique, the fact that positive charge and mass transport directions was opposite during the first anodic potential scan was found. This is due to water molecules were introduced into the coating in order to fill the hydrophilic regions with solvents while excess Os(bpy)_3^3+ or Os(bpy)_3^2+ were ejected from the coating to maintain the charge balance in the Nation coatings. Since the mass change arising from the introduction of water is quite large over the mass of the excess Os(bPy)_3^3+ or Os(bpy)_3^2+ ejected from the coating during the first anodic potential scan, the net mass looks to move from the coating to solution. When cyclic potential scans were repeated, directions of the charge transport and the mass transport purely come from introduction and ejection of electrolyte cations became parallel after few cycles.