The polymer backbone, as well as the Si-H vibrational, modes of polysilanes (SiH)n and (SiH2)n have been identified through Raman scattering techniques. The intensities of these modes were then studied as a function of the oxidation of the sample. With time, one can see the growth of certain modes which can be identified as those arising from SiHO, SiH2O, and SiH202 groupings. The relationship between the stretching and bending modes of these clusters is discussed and compared to those existing in amorphous silicon hydrogen (a-SiH2). A further comparison is made with a study on the sample kept in an oxygen-free atmosphere.

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.