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Vibrations of the NH/sub 3/D/sup +/ ion in NH/sub 4/BG/sub 4/ crystals at low temperatures

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100300a008· OSTI ID:6193538
The infrared spectra of the N-D stretching bands of dilute NH/sub 3/D/sup +/ in NH/sub 4/BF/sub 4/ were studied over the temperature range from 7 K to room temperature. The low-temperature spectra show the three bands expected from the site symmetry. On raising the temperature, these bands collapse together and broaden due to the onset of librational motion. Dephasing of the vibrational energy levels is accomplished by interaction among the librational states. This interaction can be determined from the spectral parameters. The librational motion of this and similar salts is governed by a rotational barrier, the height of which is not easily correlated with degree of hydrogen bonding.
Research Organization:
Univ. of California, Berkeley
OSTI ID:
6193538
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:16; ISSN JPCHA
Country of Publication:
United States
Language:
English