X-RAY PHOTOELECTRON AND NMR-STUDIES OF POLYFLUORINATED C-60 - EVIDENCE THAT C-C BONDS ARE BROKEN

In order to better understand the properties and composition of solids pf polyfluorinated C-60, X-ray photoelectron spectroscopy (XPS) was u sed to characterize several different C60Fx samples synthesized in two different laboratories. Quantitative measurements of the F-1s, C-1s a nd O-1s, XPS signals established the elemental stoichiometry of each s ample. The F/C ratios for the different samples ranged from 28/60 to 5 3/60 in general agreement with previous mass spectroscopy studies of e ach sample. C-1s energies and shifts as well as solid-state nuclear ma gnetic resonance studies provided additional information about the deg ree of fluorination and level bf C-C bond breaking.