Self-Diffusion in Viscous Liquids: Pulse NMR Measurements
- 1 August 1972
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 57 (3), 1293-1297
- https://doi.org/10.1063/1.1678389
Abstract
It is shown that measurement of the nuclear magnetic resonance(NMR)relaxation times in viscous media can lead to a determination of the coefficient of self‐diffusion, D. Of particular value is the measure of the spin‐lattice relaxation time in the rotating frame T 1p as a function of the applied rf field, H 1. Depending upon the particular system under study, the method may be used to measure proton self‐diffusion in the range 10 −8 cm 2 / sec ≳ D ≳ 5 × 10 −13 cm 2 / sec and is, therefore, applicable to the study of very viscousliquids. By employing nuclei other than protons, both limits of this range may be decreased by two orders of magnitude or more. In contrast to other NMR techniques which measure properties of slow molecular motion, this technique measures the coefficient of self‐diffusion rather than the correlation time for diffusive motion. As an illustration of the method, measurement of the self‐diffusion constant in glycerol has been extended to a value more than an order of magnitude smaller than that measured by conventional NMR techniques.Keywords
This publication has 16 references indexed in Scilit:
- Rotational Spin–Lattice and Spin–Spin Quadrupole Relaxation in Perdeuterated GlycerolThe Journal of Chemical Physics, 1971
- Zur Deutung der Protonenspinrelaxation in GlycerinThe European Physical Journal A, 1971
- Nuclear spin lattice relaxation and stochastic isotropic translation of protons in elastomers and glycerolJournal of Physics C: Solid State Physics, 1971
- Low frequency spin lattice relaxation in glycerolChemical Physics Letters, 1970
- Nuclear Spin Relaxation by Translational Diffusion in Liquid EthanePhysical Review B, 1969
- Spin-Lattice Relaxation in the Rotating Frame: Weak-Collision CasePhysical Review B, 1966
- Nuclear Magnetic Dipole—Dipole Relaxation Along the Static and Rotating Magnetic Fields: Application to GypsumThe Journal of Chemical Physics, 1966
- Observation of Ultra-Slow Translational Diffusion in Metallic Lithium by Magnetic ResonancePhysical Review B, 1965
- Nuclear Magnetic Relaxation by Intermolecular Dipole-Dipole InteractionsPhysical Review B, 1963
- Nuclear Spin Relaxation by Translational DiffusionPhysical Review B, 1953