The translation-rotation energy levels of the asymmetric quantum rotors HD and HF entrapped inside C60 cages
This proposal is to study and determine the translation-rotation energy levels of asymmetric quantum rotors entrapped inside a C60 fullerene cage. Samples of HF@C60 and HD@C60 will be studied. This extends earlier investigations of symmetrical rotors such as H2 and H2O which exist as ortho and para nuclear spin-isomers. In breaking the symmetry there is no spin-isomerism and we expect a significant effect on the quantum states arising from the asymmetric distribution of mass. The HF@C60 system provides the unique opportunity to study a chemically isolated HF molecule. However, the electric dipole moment of HF provides a mechanism for a physical interaction between HF molecules in different cages. We anticipate similar and analogous effects to H2O@C60 where in studies to date we are beginning to glimpse fascinating dielectric effects possibly including ferroelectricity. As in the H2O system we expect the electric dipole moment to be responsible for a symmetry breaking that reveals itself in the structure of the TR manifold of energy levels. The TR levels will provide us with the framework for understanding the physical properties.
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HORSEWILL Anthony J.; ALOM Shamim; JIMENEZ RUIZ Monica; JOHNSON Mark Robert; LEVITT Malcolm; MAMONE Salvatore; ROLS Stephane and Richard J. Whitby. (2014). The translation-rotation energy levels of the asymmetric quantum rotors HD and HF entrapped inside C60 cages. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-425
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