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S. Provencher (1984)
CONTIN: A general purpose constrained regularization program for inverting noisy linear algebraic and integral equationsComputer Physics Communications, 27
M. Rahaman (1995)
Ceramic Processing and Sintering
S. Stapf, R. Kimmich, R. Seitter, A. Maklakov, V. Skirda (1996)
Proton and deuteron field-cycling NMR relaxometry of liquids confined in porous glassesColloids and Surfaces A: Physicochemical and Engineering Aspects, 115
S. Meiboom, D. Gill (1958)
Modified Spin‐Echo Method for Measuring Nuclear Relaxation TimesReview of Scientific Instruments, 29
S. Stapf, R. Kimmich (1995)
Molecular dynamics in confined monomolecular layers. A field-cycling nuclear magnetic resonance relaxometry study of liquids in porous glassJournal of Chemical Physics, 103
M. Simina, R. Nechifor, I. Ardelean (2011)
Saturation‐dependent nuclear magnetic resonance relaxation of fluids confined inside porous media with micrometer‐sized poresMagnetic Resonance in Chemistry, 49
S. Godefroy, J. Korb, M. Fleury, R. Bryant (2001)
Surface nuclear magnetic relaxation and dynamics of water and oil in macroporous media.Physical review. E, Statistical, nonlinear, and soft matter physics, 64 2 Pt 1
D. Mintzopoulos, J. Ackerman, Yi-Qiao Song (2011)
MRI of trabecular bone using a decay due to diffusion in the internal field contrast imaging sequenceJournal of Magnetic Resonance Imaging, 34
R. Kimmich, E. Anoardo (2004)
Field-Cycling NMR RelaxometryProgress in Nuclear Magnetic Resonance Spectroscopy, 44
Franco D'Orazio, S. Bhattacharja, W. Halperin, K. Eguchi, Takao Mizusaki (1990)
Molecular diffusion and nuclear-magnetic-resonance relaxation of water in unsaturated porous silica glass.Physical review. B, Condensed matter, 42 16
Yi-Qiao Song (2003)
Using internal magnetic fields to obtain pore size distributions of porous mediaConcepts in Magnetic Resonance Part A, 18
J. Korb, M. Whaley-Hodges, R. Bryant (1997)
Translational diffusion of liquids at surfaces of microporous materials: Theoretical analysis of field-cycling magnetic relaxation measurementsPhysical Review E, 56
J. Korb (2011)
Nuclear magnetic relaxation of liquids in porous mediaNew Journal of Physics, 13
G. Padhy, C. Lemaire, E. Amirtharaj, M. Ioannidis (2007)
Pore size distribution in multiscale porous media as revealed by DDIF–NMR, mercury porosimetry and statistical image analysisColloids and Surfaces A: Physicochemical and Engineering Aspects, 300
Yi Song, S. Ryu, P. Sen (2000)
Determining multiple length scales in rocksNature, 406
R. Kimmich (2001)
NMR: Tomography, Diffusometry, Relaxometry
G. Diakova, Yanina Goddard, J. Korb, R. Bryant (2011)
Water-proton-spin-lattice-relaxation dispersion of paramagnetic protein solutions.Journal of magnetic resonance, 208 2
K. Brownstein, C. Tarr (1979)
Importance of classical diffusion in NMR studies of water in biological cellsPhysical Review A, 19
A. Pohlmeier, S. Haber-Pohlmeier, S. Stapf (2009)
A Fast Field Cycling Nuclear Magnetic Resonance Relaxometry Study of Natural SoilsVadose Zone Journal, 8
Siegfried Stapf, Rainer Kimmich, R. Seitter (1995)
Proton and deuteron field-cycling NMR relaxometry of liquids in porous glasses: Evidence for Lévy-walk statistics.Physical review letters, 75 15
R. Valckenborg, L. Pel, K. Kopinga (2001)
NMR Relaxation and Diffusion Measurements on Iron(III)-Doped Kaolin ClayJournal of Magnetic Resonance, 151
Jean‐Christophe Perrin, S. Lyonnard, A. Guillermo, P. Levitz (2007)
Water dynamics in ionomer membranes by field-cycling NMR relaxometry.Magnetic resonance imaging, 25 4
Frequency‐dependent NMR relaxation studies have been carried out on water (polar) and cyclohexane (nonpolar) molecules confined inside porous ceramics containing variable amounts of iron oxide (III). The porous ceramics were prepared by compression of powders mixed with iron oxide followed by thermal treatment. The pore size distribution was estimated using a technique based on diffusion in internal fields that exposed a narrow distribution of macropore sizes with an average pore dimension independent of iron oxide content. The relaxation dispersion curves were obtained at room temperature using a fast field cycling NMR instrument. They display an increase of the relaxation rate proportional to the iron oxide concentration. This behavior is more prominent at low Larmor frequencies and is independent of the polar character of the confined molecules. The results reported here can be fitted well with a relaxation model considering exchange between molecules in the close vicinity of the paramagnetic centers located in the surface and bulk‐like molecules inside the pores. This model allows the extraction of the transverse diffusional correlation time that can be related to the polar character of the confined molecules. Copyright © 2013 John Wiley & Sons, Ltd.
Magnetic Resonance in Chemistry – Wiley
Published: Feb 1, 2013
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