Transmission electron-energy-loss spectra of crystalline C76 were measured and compared with those of C60, C70, and C84. The spectra due to π→π* interband transitions of C76 were much broader than those of C60 because of the reduced degeneracy of the π electron-energy states owing to the lower molecular symmetry of C76. The band-gap energy of C76 was revealed to be 1.3 eV, which can be directly compared with that obtained by theoretical calculations for the C76 isomer with D2 symmetry.
ASJC Scopus subject areas
- Condensed Matter Physics