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C(60)-based triads with improved electron-acceptor properties: pyrazolylpyrazolino[60]fullerenes
F Langa1, P de la Cruz, E Espíldora
1Departamento Q. Orgánica, Facultad de CC del Medio Ambiente, Universidad de Castilla-La Mancha, 45071, Toledo, Spain. flanga@amb-to.uclm.es
The Journal of Organic Chemistry
|July 21, 2001
Abstract:
A series of triad pyrazolylpyrazolino[60]fullerenes has been prepared in one pot from suitably functionalized hydrazones by 1,3-dipolar cycloaddition reactions under microwave irradiation. The electrochemical properties of the compounds obtained were investigated by cyclic voltammmetry, and they show better electron acceptor character than the parent C(60) in all cases. Fluorescence experiments and time-resolved transition spectroscopy indicate the existence of photoinduced charge-transfer processes with the C(60) triplet acting as the acceptor.