Water dynamics is DMSO-water mixture

We study water dynamics in the eutectic DMSO-water mixture by incoherent qu asielastic neutron scattering. Water individual motions are modelled by unc oupled whole-molecule translations and rotations around the center of mass. We determine water self-diffusion coefficients, residence times for jump d iffusion and rotational relaxation times, previously related to the hydroge n-bond "lifetime". We therefore quantify the perturbation of water dynamics due to competing hydrophilic/hydrophobic interactions with DMSO. (C) 2000 Elsevier Science B.V. All rights reserved.