Fluorescence of the C60-pyridine system in electrochemistry reduction processes

Three groups of strong fluorescence peaks Of C-60, centered at 440, 575 and 700 nm, are observed in the supersaturated C-60 Pyridine solution, and the onsite fluorescence spectra of this C-60-Pyridine system in the first and second electrochemistry reduction processes are obtained for the first time. The results indicate that the fluorescence peaks centered at 440 nm originate from C-60 molecules dissolved in supersaturated C-60-pyridine solution, while fluorescence bands centered at 575 and 700 nm are emitted from undissolved C-60- It is also proved that a strong charge transfer interaction, which is significant for the symmetry increase of C-60(n-), as well as the formation of a transmission channel of energy, occurs between C-60(n-) and pyridine, as is supported by surface-enhanced Raman scattering (SERS) spectra as well. (c) 2005 Elsevier B.V. All rights reserved.