Abstract
We report inelastic neutron scattering (INS) measurements on molecular hydrogen deuteride (HD) trapped in binary cubic (sII) and hexagonal (sH) clathrate hydrates, performed at low temperature using two different neutron spectrometers in order to probe both energy and momentum transfer. The INS spectra of binary clathrate samples exhibit a rich structure containing sharp bands arising from both the rotational transitions and the rattling modes of the guest molecule. For the clathrates with sII structure, there is a very good agreement with the rigorous fully quantum simulations which account for the subtle effects of the anisotropy, angular and radial, of the host cage on the HD microscopic dynamics. The sH clathrate sample presents a much greater challenge, due to the uncertainties regarding the crystal structure, which is known only for similar crystals with different promoter, but nor for HD (or H2) plus methyl tert-butyl ether (MTBE-d12).
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Dates
Type | When |
---|---|
Created | 10 years, 11 months ago (Oct. 1, 2014, 8:30 p.m.) |
Deposited | 2 years, 2 months ago (July 3, 2023, 9:05 p.m.) |
Indexed | 1 month ago (July 30, 2025, 7:04 a.m.) |
Issued | 10 years, 11 months ago (Oct. 1, 2014) |
Published | 10 years, 11 months ago (Oct. 1, 2014) |
Published Online | 10 years, 11 months ago (Oct. 1, 2014) |
Published Print | 10 years, 10 months ago (Oct. 7, 2014) |
Funders
1
NSF
10.13039/100000001
National Science FoundationRegion: Americas
gov (National government)
Labels
4
- U.S. National Science Foundation
- NSF
- US NSF
- USA NSF
Awards
1
- CHE-1112292
@article{Colognesi_2014, title={The HD molecule in small and medium cages of clathrate hydrates: Quantum dynamics studied by neutron scattering measurements and computation}, volume={141}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.4896623}, DOI={10.1063/1.4896623}, number={13}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Colognesi, Daniele and Powers, Anna and Celli, Milva and Xu, Minzhong and Bačić, Zlatko and Ulivi, Lorenzo}, year={2014}, month=oct }