Fig. 2. UV/Vis spectra of (a) ionic (rac)-2 and (b) non-ionic (rac)-2Ac in different oxidation states. Isosbestic points indicating a clean transition from TTF˙⁺ to TTF²⁺ are highlighted with red circles. Spectra were obtained with 25 μM solutions in CH₂Cl₂ using bulk Fe(ClO₄)₃ as the oxidant; (c) correlation diagram of half-wave potentials obtained by cyclic voltammetry for the first and second redox process of (rac)-2, dTTFC8 and (rac)-2Ac (each 1 mM) in CH₂Cl₂ referenced against Fe(Cp)₂^0/+ with NBu₄PF₆ (0.1 M) as the electrolyte.