Raman scattering in stage 2 graphite-bromine

The Raman spectra for single-stage graphite-bromine stage 2 compounds show a singlet peak at 1612.5 cm^-1 when the spectra are taken on samples encapsulated in glass ampoules containing bromine vapor to prevent desorption. These results are consistent with Raman spectra on other stage 2 intercalation compounds but are different from previously reported results on graphite-bromine. The Raman spectra for a desorbing stage 2 graphite-bromine sample show that a doublet structure develops soon after the glass ampoule is broken.