The chemical bonding and the electronic structures of C 60 F x and C 70 F x were investigated by near edge X-ray absorption fine structure (NEXAFS) spectroscopy and UV photoemission spectroscopy (UPS), which are useful methods for examining the unoccupied and the occupied states, respectively. With these results and XPS measurements, we derived the electronic energy diagram of C 60 F x and discussed the change of the electronic structure from that of C 60 by fluorination. The energies of the LUMO and the Fermi level of solid C 60 F 48 were estimated to be -5.0 and -5.4 eV below the vacuum level, indicating that highly doped C 60 F x is a strong electron acceptor. The electronic absorption spectra of C 60 F x solutions deep into the vacuumultraviolet region were also measured, and the isomerism of C 60 F x was discussed by comparing the observed results with theoretical simulations.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.