Next, cyclic voltammograms were recorded (Fig. ). In acetonitrile, both PFCPPs showed a reduction potential (-1.23 V vs ferrocene(II)/ferrocenium(III)) higher than those of previously reported CPPs and partially fluorinated CPPs, indicating that the perfluorination increases the electron affinity of CPPs . Fig. shows the HOMO and LUMO of PF [10]CPP with their energies calculated at B3LYP/6-31G(d) level of theory (for details on PF [12]CPP, see the SI). While the shape and distribution of each frontier molecular orbital of PF [10]CPP are almost identical to that of [10]CPP, the HOMO-LUMO gap is wider (PF [10]CPP: 4.24 eV) than that of [10]CPP (3.54 eV) , which is in line with the hypsochromic shift of the absorption spectra.