Ioan Ardelean, Carlos Mattea, German Farrher, Surjani Wonorahardjo, Rainer Kimmich
Translational diffusion of water and cyclohexane as polar and nonpolar solvent species was studied with NMR diffusometry in a nanoporous silica glass (Vycor) as a function of the filling factor. A "two-phase fast-exchange model" for the effective diffusion coefficient was established and compared to experimental data. For diffusion in the vapor phase, contributions by ordinary ("Einstein") and Knudsen diffusion were distinguished.
Universität Ulm, Sektion Kernresonanzspektroskopie, 89069 Ulm, Germany; Technical Univ. of Cluj-Napoca, Department of Physics, 3400 Cluj-Napoca, Romania; The State University of Malang, Department of Chemistry, Malang, Indonesia
