The carbon K-edge absorption spectra of microcrystalline C,,, have been measured using 270-330 eV synchrotron radiation and compared with that of a previously reported micrccrystalline C,. The differences in the cage structure between the C, and Csa fullercna arc clearly reflected in their XANES (X-
Unfilled orbitals of C60 and C70 from carbon K-shell X-ray absorption fine structure
✍ Scribed by L.J. Terminello; D.K. Shuh; F.J. Himpsel; D.A. Lapiano-Smith; J. Stöhr; D.S. Bethune; G. Meijer
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 478 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The K-shell near-edge X-ray absorption fine structure spectra of solid CbO and Ciu have been recorded with high spectral resolution. The spectra exhibit sharp resonances associated with transitions to unfilled P* molecular orbitals and, at higher energy, broader resonances associated with cJ*-like orbitals. The observed energy splitting of the x* resonances can be accounted for by published extended Hiickel calculations. Our data clearly reveal that the fullerene films resemble molecular solids with considerably stronger intra-molecular than inter-molecular interactions.
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