The electrochemical behavior of DMACPyBP, PXZPyBP, and DPACzPyBP was studied using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) in degassed dichloromethane (DCM) with tetra-n-butylammonium hexafluorophosphate ([ n Bu4N]PF6) as the supporting electrolyte (Figure ). Voltammograms were referenced to Fc/Fc + , and the data are reported versus a saturated calomel electrode (SCE), as summarized in Table . As shown in Figure , both the oxidation and the reduction waves of all three compounds were found to be reversible. The oxidation potential (Eox), determined from the DPV peak values, are 1.08 V for DMACPyBP, 0.92 V for PXZPyBP and 0.72 V for DPACzPyBP, exhibiting the expected cathodic shift correlated with the increasing electron-donating ability of their donor units (DMAC < PXZ < DPACz). The corresponding HOMO levels are -5.42, -5.26, and -5.05 eV for DMACPyBP, PXZPyBP and DPACzPyBP, respectively, which match very well with the DFT calculated HOMO levels (-5.30 eV for DMACPyBP, -5.12 eV, for PXZPyBP, and