Multi‐Stage Redox Systems Based on Dicationic P‐Containing Polycyclic Aromatic Hydrocarbons
Thomas Delouche, Antoine Vacher, Elsa Caytan, Thierry Roisnel, Boris Le Guennic, Denis Jacquemin, Muriel Hissler, Pierre‐Antoine Bouit
Abstract
We report the straightforward synthesis of unprecedented electron-acceptors based on dicationic P-containing PAHs (Polycyclic Aromatic Hydrocarbons) based on copper mediated radical approach. In these systems, two phosphoniums are connected through various PAHs backbones. The impact of π-extension on both the optical and redox properties is investigated using a joint experimental (UV/Vis absorption, fluorescence and cyclic voltammetry) and theoretical approach (TD-DFT calculations). Finally, (spectro)-electrochemical studies prove that these compounds possess three redox states and EPR studies confirm the in situ formation of an organic radical delocalized on the PAH backbone.