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Molecular conformation of hydrogen-bonded ethylene glycol in sodalite: A 1H CRAMPS NMR, IR, and 2H NMR study
- Molecular conformation of hydrogen-bonded ethylene glycol in sodalite: A 1H CRAMPS NMR, IR, and 2H NMR study
- Han D.-Y.; Woo A.J.; Nam I.-S.; Hong S.B.
- Ewha Authors
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- Journal of Physical Chemistry B
- Journal of Physical Chemistry B vol. 106, no. 24, pp. 6206 - 6210
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- Analysis of the variable-temperature 1H CRAMPS NMR, IR, and 2H NMR spectra obtained from the ethylene glycol molecules in two sodalite materials with Si/Al ratios of ∞ and ca. 5 reveals that the intermolecular hydrogen bonds between the framework oxygens and the OH groups of the guest molecule, which appear only in the isomorphously Al-substituted zeolite, are preserved even at 200 °C, which is higher than the crystallization temperature (175 °C) of the zeolite host. As a consequence, the conformations of the encapsulated ethylene glycol molecules in these two materials were found to maintain in a manner distinctly different from each other over the temperature range (25-200 °C) studied here.
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