Rotor in a cage: infrared spectroscopy of an endohedral hydrogen-fullerene complex
| Autor: | Martin C. Grossel, Urmas Nagel, D. Hüvonen, Koichi Komatsu, A. Danquigny, Min Ge, Toomas Rõõm, Yasujiro Murata, Malcolm H. Levitt, Salvatore Mamone, Marina Carravetta, F. Cuda |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Coupling
Chemical Physics (physics.chem-ph) Materials science Rotor (electric) Infrared Rotation around a fixed axis General Physics and Astronomy Infrared spectroscopy FOS: Physical sciences Molecular physics law.invention Condensed Matter - Other Condensed Matter chemistry.chemical_compound chemistry law Physics - Chemical Physics Physics::Atomic and Molecular Clusters Molecule Endohedral hydrogen fullerene Physical and Theoretical Chemistry Quantum Other Condensed Matter (cond-mat.other) |
| Popis: | We report the observation of quantized translational and rotational motion of molecular hydrogen inside the cages of C60. Narrow infrared absorption lines at the temperature of 6K correspond to vibrational excitations in combination with translational and rotational excitations and show well resolved splittings due to the coupling between translational and rotational modes of the endohedral H2 molecule. A theoretical model shows that H2 inside C60 is a three-dimensional quantum rotor moving in a nearly spherical potential. The theory provides both the frequencies and the intensities of the observed infrared transitions. Good agreement with the experimental results is obtained by fitting a small number of empirical parameters to describe the confining potential, as well as the ortho to para ratio. Submitted to The Journal of Chemical Physics, 4 pages, 2 eps figures |
| Databáze: | OpenAIRE |
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