Molecular Mobility of the Water Molecules in Aqueous Sucrose Solutions, Studied by 2H-NMR Relaxation

Deuteron spin lattice relaxation times T 1 of sucrose/D 2 O solutions are given as function of temperature, pressure, frequency and concentration. From the temperature dependence of the 2 H -T 1 the rotational dynamics of the hydrated sucrose complex and the water molecules are determined. For high pressure and high concentrations the temperature dependence of the water molecules is described by a Vogel-Tammann-Fulcher equation. The ideal glass transition temperatures T O H2O derived for the water molecules are at higher concentrations almost constant and smaller than the T O suc of the sugar molecules