The electrochemical properties of TPPO-tBu-DiKTa and TPA-tBu-DiKTa were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) in degassed DCM with 0.1 M [ n Bu4N]PF6 as the supporting electrolyte and Fc/Fc + as the internal reference (0.46 V vs. SCE) in order to estimate the HOMO and LUMO values. As shown in Figure , there is an irreversible oxidation wave for TPPO-tBu-core. By contrast, there is a reversible oxidation wave that is cathodically shifted to 1.04