We next investigated the optoelectronic properties in dilute solution. The energies of FMOs were inferred from the electrochemistry, where oxidation and reduction potentials (E ox /E red ) were obtained using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) in deaerated dichloromethane (DCM) with 0.1 M [ n Bu 4 N]PF 6 as the supporting electrolyte. The electrochemical data are presented in Table . The E ox /E red values of PhCz-O-DikTa and PhCz-DiKTa determined from the DPV peaks, are 1.26/-1.34 V and 1.27/-1.35 V, respectively, vs SCE (Figure ), with corresponding HOMO/LUMO values of -5.60/-3.00 eV and -5.61/-2.99 eV, respectively. The similar FMO energies disclose the almost identical electronic configurations of the HOMO and LUMO in these two compounds. The slightly different FMO energies of PhCz-O-DikTa and PhCz-DiKTa compared to those of DiKTa (HOMO = -5.93 eV, LUMO = -3.11 eV) result from the weak electrondonation of the PhCz donor with the DiKTa core.