ELECTRONIC-STRUCTURE OF C-70 AND C-70(S-8)(6) STUDIED USING ELECTRON-ENERGY-LOSS SPECTROSCOPY

The electronic structure of C-70 and C-70(S-8)(6) has been studied usi ng electron energy-loss spectroscopy. C1s core level excitation measur ements yield the C2p-derived unoccupied density of stales. The low ene rgy loss function gives information on interband transitions and plasm on excitations. All these spectra, and therefore the electronic struct ure, are nearly identical in the two compounds, both being solids cont aining van-der-Waals bound C-70 molecules. Any possible interaction wi th the S-8 rings does not contribute significantly to the observed ele ctronic structure.