Study of oxygen-C60 compound formation by NEXAFS and RIXS
Department of Physics, Uppsala University, BOX 530, S-75121 Uppsala, Sweden
2 Department of Inorganic Chemistry, Uppsala University, BOX 538, S-75121 Uppsala, Sweden
Corresponding author: a Tanel.Kaambre@fysik.uu.se
Published online: 15 September 2001
The interaction of oxygen with C60 molecules was studied on a C60 film which had been exposed simultaneously to oxygen and UV-light for 190 hours, producing an approximately C60O1 stoichiometry in the bulk of the sample. C K-edge and O K-edge NEXAFS (using total fluorescence yield detection) and resonant X-ray inelastic scattering (RIXS) spectra from the sample film were measured and the C K-edge data were compared to the spectra from pristine C60 as reference. The C K-edge absorption and emission spectral profiles of the oxygen-doped sample are similar to those of the C60 reference, suggesting that cage breaking of C60 under these conditions, if any, is negligible. However, the redistribution of intensities in the spectra indicates changes in the occupancies of different molecular orbitals, possibly due to changes in electron density upon reaction. Similarities of the O K-edge soft X-ray emission (SXES) spectra to several small oxygen-containing molecules is being discussed in terms of bonding models.
PACS: 73.61.Wp – Fullerenes and related materials / 33.50.Dq – Fluorescence and phosphorescence spectra / 33.20.Rm – X-ray spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001