Photophysics of C60 and C60− in faujasite zeolites
School of Chemistry, Seoul National University, Seoul 151-742, Korea
Corresponding author: a email@example.com
Revised: 8 October 2001
Published online: 15 January 2002
While the intercalation of C60 and the formation of C in the supercages of NaX and NaY are confirmed by using 129Xe NMR and ESR, the photophysical properties of C60 and C are characterized by monitoring transient reflectance spectra and kinetics, fluorescence kinetics, and diffuse reflectance spectra. C is considerably more abundant in NaY than in NaX. This difference is explained in terms of polarity difference between two zeolites. Both C60 and C have remarkably elongated excited-state lifetimes due to their collision-free environment in zeolitic nanocavities although C has much shorter lifetimes than C60. C, in particular, shows intense absorption and emission due to its reduced symmetry in zeolites.
PACS: 33.50.-j – Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion) / 78.40.-q – Absorption and reflection spectra: visible and ultraviolet / 61.48.+c – Fullerenes and fullerene-related materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002