Low energy vibrational excitations in single bonded fullerene dimeres (C59N
)(2) and (C-60(-))(2) and in single wall carbon nanotubes were investigated
by Raman spectroscopy. The two isoelectronic and isostructural dimeres exh
ibited very similar spectra with strongly resonance enhanced lines for the
radial modes if excitation was with a red laser. For the biazafullerene for
the first time all three geometrically allowed intercage modes could be id
entified. For the single wall carbon nanotubes the response from the radial
breathing mode was analyzed for excitation with 20 different laser lines.
The results were found to be consistent with contributions from all geometr
ically allowed tubes and a strong contribution to the force constant from i
ntercage interaction.