Abstract
ABSTRACT The syntheses and a systematic spectroscopic study of a series of fulleropyrrolidines containing polycyclic aromatic hydrocarbon are reported. The fulleropyrrolidines were characterized by UV, IR, 1H-NMR, 13C-NMR and ESI-MS. According to the absorption spectra and the electrochemical data, no significant interaction was observed between the polycyclic aromatic rings and fullerene moiety in the ground state of fulleropyrrolidines. However, the fluorescence and nanosecond transient absorption spectra indicate that these fulleropyrrolidines have sensitized fluorescence of fullerene due to the intramolecular energy transfer, and that their excited triplet state production are considerably reduced, which in turn result in a lower optical limiting performance compared with that of C60.
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