IR-SPECTRA OF CO2 AND N2O ADSORBED ON C-60 AND OTHER CARBON ALLOTROPES - A COMPARATIVE-STUDY

IR spectra of CO2 and N2O adsorbed on C-60, graphite and diamond films were recorded at low temperatures. The IR spectra of adsorbed C0(2) a nd N2O indicated that only one adsorption site was present on the thre e allotropes. When CO2 was adsorbed on C-60 and graphite, removal of d egeneracy of the v(2) vibration mode occurred. The absorption band app eared as a doublet. When N2O was adsorbed on the three adsorbents, the re was no removal of degeneracy of the v(2) vibration mode, which appe ared as a single band. Large spectral shifts of the v(3) band and long er desorption times were recorded for both CO2 and N2O adsorbed on C-6 0, relative to the small spectral shifts and shorter desorption times recorded on graphite and diamond. These results indicate a strong inte raction of these adsorbates with C-60 compared to the other carbon all otropes.