Multivalent fullerene/π-extended TTF electroactive molecules - non-covalent interaction with graphene and charge transfer implications

New multivalent and electroactive molecules based on 9,10-di(1,3-dithiole-2-ylidene)-9,10-dihydroanthracene (pi-exTTF) and [60]fullerene were prepared via copper-catalyzed azide-alkyne cycloaddition click reaction in an efficient manner. Their non-covalent anchoring on the graphene surface was confirmed by TGA, FTIR spectroscopy, UV-vis spectroscopy, AFM, SEM and TEM characterization. Raman spectroscopy reveals the electronic nature of the supramolecular interactions.