Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

The dynamic isotope effects (IE) on the translational and rotational motion in liquid ammonia and water are reassessed by NMR measurements. For H2O/D2O the translational and rotational IE are clearly distinct. At 298 K, 23% and 30% are obtained, respectively. Both effects as well as the slopes of the temperature dependencies increase with decreasing temperature. For NH3/ND3 a rotational IE of 37% was observed at 298 K. A small increase to 40% at 222 K could be ascertained. The translational IE is about 15% at room temperature and exhibits a stronger temperature dependence. It is suggested that the observed deviations of the IE’s from the square root of mass and square root of moments of inertia laws are caused by translation-rotation coupling as well as quantum effects. The experimental data obtained in the present paper are also of importance for the correct interpretation of all kinds of experiments on water and ammonia, where isotopic substitutions are involved.

Bibliography

Hardy, E. H., Zygar, A., Zeidler, M. D., Holz, M., & Sacher, F. D. (2001). Isotope effect on the translational and rotational motion in liquid water and ammonia. The Journal of Chemical Physics, 114(7), 3174–3181.

Authors 5
  1. Edme H. Hardy (first)
  2. Astrid Zygar (additional)
  3. Manfred D. Zeidler (additional)
  4. Manfred Holz (additional)
  5. Frank D. Sacher (additional)
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Dates
Type When
Created 23 years ago (July 26, 2002, 10:14 a.m.)
Deposited 1 year, 6 months ago (Feb. 5, 2024, 7:13 p.m.)
Indexed 1 month ago (July 20, 2025, midnight)
Issued 24 years, 6 months ago (Feb. 15, 2001)
Published 24 years, 6 months ago (Feb. 15, 2001)
Published Print 24 years, 6 months ago (Feb. 15, 2001)
Funders 0

None

@article{Hardy_2001, title={Isotope effect on the translational and rotational motion in liquid water and ammonia}, volume={114}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1340584}, DOI={10.1063/1.1340584}, number={7}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Hardy, Edme H. and Zygar, Astrid and Zeidler, Manfred D. and Holz, Manfred and Sacher, Frank D.}, year={2001}, month=feb, pages={3174–3181} }