Spectroelectrochemistry of reference phenothiazine 10 in PhCN solution with 0.1 mol/L▔1 TBAP as supporting electrolyte. The black curve was obtained at open circuit voltage (OCV), while the other curves are spectra recorded at steady-state current (Fc/Fc+ = 0.08 V vs. Ag/Ag+) with increasing potential. Inset: Voltammogram of 10 at 0.1 Vs▔1 on a Pt grid in the spectroelectrochemical cell. The potentials at which the spectra were recorded are marked on the oxidation wave.