NUCLEAR-RELAXATION OF LIQUIDS IN CONFINEMENTS

We study theoretically the effects of geometrical confinement on the d ipolar relaxation of of a non-interacting liquid in porous media. Appl ication to the H-1 relaxation of methylcyclohexane liquid in porous si lica glasses is given. The case of an interacting liquid is considered by molecular dynamics simulations. Geometrical confinement and surfac e interaction lead to similar frequency behaviour of relaxation rates according to the layering of local density and anisotropy of the molec ular mobility.