Quantum rotation of ortho and para -water encapsulated in a fullerene cage
Proceedings of the National Academy of Sciences2012Vol. 109(32), pp. 12894–12898
Citations Over TimeTop 10% of 2012 papers
C. Beduz, Marina Carravetta, Judy Chen, Maria Concistrè, M.S. Denning, Michael Frunzi, A.J. Horsewill, Ole G. Johannessen, Ronald G. Lawler, Xuegong Lei, Malcolm H. Levitt, Yongjun Li, Salvatore Mamone, Yasujiro Murata, U. Nagel, Tomoko Nishida, Jacques Ollivier, S. Rols, T. Rõõm, Riddhiman Sarkar, Nicholas J. Turro, Y. Yang
Abstract
Inelastic neutron scattering, far-infrared spectroscopy, and cryogenic nuclear magnetic resonance are used to investigate the quantized rotation and ortho-para conversion of single water molecules trapped inside closed fullerene cages. The existence of metastable ortho-water molecules is demonstrated, and the interconversion of ortho-and para-water spin isomers is tracked in real time. Our investigation reveals that the ground state of encapsulated ortho water has a lifted degeneracy, associated with symmetry-breaking of the water environment.
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