Abstract
Using various temperature-cycling protocols, the dynamics of ice I were studied via dielectric spectroscopy and nuclear magnetic resonance relaxometry on protonated and deuterated samples obtained by heating high-density amorphous ices as well as crystalline ice XII. Previous structural studies of ice I established that at temperatures of about 230 K, the stacking disorder of the cubic/hexagonal oxygen lattice vanishes. The present dielectric and nuclear magnetic resonance investigations of spectral changes disclose that the memory of the existence of a precursor phase is preserved in the hydrogen matrix up to 270 K. This finding of hydrogen mobility lower than that of the undoped hexagonal ice near the melting point highlights the importance of dynamical investigations of the transitions between various ice phases and sheds new light on the dynamics in ice I in general.
| Original language | English |
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| Article number | 134502 |
| Journal | Journal of Chemical Physics |
| Volume | 148 |
| Issue number | 13 |
| DOIs | |
| State | Published - Apr 7 2018 |
| Externally published | Yes |
Funding
We thank the Deutsche Forschungsgemeinschaft, Grant No. BO1301/12-1 and the Austrian Science Fund FWF, Project No. I1392, for the financial support provided for this project. Thomas Loerting thanks the Alexander von Humboldt Foundation for the financial support of his research visit in Dortmund. V.F.L. is a recipient of a DOC fellowship of the Austrian Academy of Sciences AW.