NMR oxygen-17 studies of the state of water in a saturated sucrose solution

The frequency dependence of the water oxygen-17 transverse and longitudinal relaxation times is used to investigate the dynamic state of water in a saturated sucrose solution at 298K. Assuming that the observed frequency dependence originates from the slow modulation of the residual quadrupole coupl...

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Published inJournal of molecular liquids Vol. 75; no. 1; pp. 45 - 59
Main Authors Hills, Brian P., Tang, Hui-ru, Belton, Peter S., Khaliq, Abdul, Harris, Robin K.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1998
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Summary:The frequency dependence of the water oxygen-17 transverse and longitudinal relaxation times is used to investigate the dynamic state of water in a saturated sucrose solution at 298K. Assuming that the observed frequency dependence originates from the slow modulation of the residual quadrupole coupling of the water-sucrose interaction, an anisotropic rotation model is used to extract water rotational correlation times and the order parameter characterizing the water-sucrose dynamic complex. Although the theory succeeds in providing a quantitative fit to the longitudinal data there is an unexpected anomalous dephasing enhancement in the transverse relaxation, and the paper concludes with a discussion of the possible origins of this enhancement and of alternative models for the dynamic state of the water.
ISSN:0167-7322
1873-3166
DOI:10.1016/S0167-7322(97)00019-6