“…It was reported that the oxidation of dithienylpyrrole systems do not significantly affected by the groups substituted on the N-position of the central pyrrole ring [22,23,25]. Aromatic subunits inserted between the thiophene rings like fluorene, naphthol, benzene, pyrrole et al [22][23][24][25][26] could decrease the oxidation potential, while Fig. 1, in the first cycle, a single irreversible oxidation peak was observed for P1, P2 and P3 at 0.88 V, 0.92 V and 0.85 V, respectively.…”