Institute for Data Analysis and Visualization

We have studied the room temperature Raman spectra of several stages of ternary GICs prepared by sequential intercalation of potassium-binary GICs with either furan, THF or NH3. A Raman study, which detects the shift of the graphite intralayer vibrational frequency due to intercalation, provides a useful tool for the probe of charge transfer of these novel materials. For all three stage 1 compounds, we have observed an intralyer graphite vibrational frequency at ~1606 cm -1 (upshifted from the pure graphite peak at 1582 cm-1), which is Fano broadened and has a Raman profile similar to that exhibited by LiC6 and EuC6. These results are compared and contrasted with those for the alkali binary GICs.