Journal of Physical Chemistry A, Vol.122, No.41, 8162-8166, 2018
Near- and Mid-IR Gas-Phase Absorption Spectra of H-2@C-60(+)-He
Near- and mid-IR absorption spectra of endohedral H-2@C-60(+) 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 C-60 and H-2@C-60, 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.