Abstract

The X-ray absorption near-edge structure (XANES) spectra of C 76 and fluorinated C 60 (C 60F x ) were measured. By comparing XANES and inverse photoemission spectra for various π-electron systems, the deviation of XANES from density of unoccupied states (DOUS) by core-excitonic effect was shown to decrease with increasing size and dimensionality. The deviation is not so large for fullerenes, and the spectrum of C 76 was compared with calculated DOUS. The change of bonding and electronic structure from C 60 to C 60F x is also discussed based on the XANES spectra.

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