α,α-Trehalose−Water Solutions. II. Influence of Hydrogen Bond Connectivity on Transport Properties

Results of photon correlation spectroscopy and viscosity measurements performed in trehalose aqueous solutions are reported. The light scattering experimental findings reveal a peculiar behavior of the effective diffusion coefficient D eff which, in the diluite region and in a limited temperature range, shows strong changes. This behavior suggests a great sensitivity of the system structure to temperature changes. On the other hand, the temperature dependence of shear viscosity η confirms the noticeable kinetically fragile character of these systems.