title: 1H NMR study of the structure and dynamics of water confined between wetting solids.
abstract: 1H NMR relaxation measurements in a broad range of frequencies give information on the dynamical behaviour of water molecules in dilute suspensions of swelling clay (Hectorite). The logarithmic frequency variation of the longitudinal relaxation rate suggests a 2D diffusion of the water molecules adsorbed on the clay particles, with a residence time as long as 10 6 s. The corresponding high activation free energy (40 kJ/mol) originates mainly from the clay-water interactions, as shown by Monte Carlo simulations of clay hydration.
authors.affiliation: CRMD, CNRS, 1b rue de la Férollerie, Orléans, France.
authors.forename: A
authors.initials: A
authors.lastname: Delville
authors.forename: M
authors.initials: M
authors.lastname: Letellier
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D009010:Monte Carlo Method; D017640:Silicates; D014867:Water
chemical_list: D017640:Silicates; D014867:Water; C013547:hectorite