  Near- and mid-IR absorption spectra of endohedral H2@C60+ have been measured
using He-tagging. The samples have been prepared using a 'molecular surgery'
synthetic approach and were ionized and spectroscopically characterized in the
gas phase. In contrast to neutral C60 and H2@C60, the corresponding He-tagged
cationic species show distinct spectral differences. Shifts and line splittings
in the near- and mid-IR regions indicate the influence of the caged hydrogen
molecule on both the electronic ground and excited states. Possible relevance
to astronomy is discussed.
