TY - JOUR

T1 - NMR-detected tracer technique to measure diffusion in condensed matter

AU - Bezrukov, Oleg F.

AU - Deloche, Bertran

AU - Struts, Andrey V.

AU - Veracini, Carlo A.

N1 - Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 1997/6/7

Y1 - 1997/6/7

N2 - A simple method to study diffusion with the help of NMR has been suggested, based on the measurement of the rate of establishment of equilibrium in a sample with initial non-equilibrium distribution of labelled species. The distribution of components in the sample during the process of diffusion was determined with the use of a standard NMR spectrometer or relaxometer. Diffusion coefficients, D, measured in water and the plastic phase of sulfolane agreed well with the data obtained by other methods. D values for dioxane in cross-linked polyurethane and for water in the lamellar phase of water-ammonium perfluorononanoate (APFN) mixtures were also measured, to demonstrate the application of the method. The technique, being a tracer method, can be applied in a number of cases where the application of spin-echo is difficult (e.g. low concentration of solvent in polymers, in conditions of incomplete averaging of internal fields, large chemical shifts etc.); for the study of mutual diffusion and dissolution kinetics of complex phase mixtures; and for the measurement of D in systems with physical hindrances to diffusion where the method allows one to determine D corresponding to 'infinite' time of observation.

AB - A simple method to study diffusion with the help of NMR has been suggested, based on the measurement of the rate of establishment of equilibrium in a sample with initial non-equilibrium distribution of labelled species. The distribution of components in the sample during the process of diffusion was determined with the use of a standard NMR spectrometer or relaxometer. Diffusion coefficients, D, measured in water and the plastic phase of sulfolane agreed well with the data obtained by other methods. D values for dioxane in cross-linked polyurethane and for water in the lamellar phase of water-ammonium perfluorononanoate (APFN) mixtures were also measured, to demonstrate the application of the method. The technique, being a tracer method, can be applied in a number of cases where the application of spin-echo is difficult (e.g. low concentration of solvent in polymers, in conditions of incomplete averaging of internal fields, large chemical shifts etc.); for the study of mutual diffusion and dissolution kinetics of complex phase mixtures; and for the measurement of D in systems with physical hindrances to diffusion where the method allows one to determine D corresponding to 'infinite' time of observation.

UR - http://www.scopus.com/inward/record.url?scp=33748732184&partnerID=8YFLogxK

U2 - 10.1039/a608419b

DO - 10.1039/a608419b

M3 - Article

VL - 93

SP - 2091

EP - 2095

JO - Transactions of the Faraday Society

JF - Transactions of the Faraday Society

SN - 1463-9076

IS - 11

ER -