Abstract
In this contribution, we review the results of our experimental studies on diffusion of guest molecules in mesoporous solids using pulsed field gradient (PFG) NMR technique. Having unique potentials to non-invasively probe the microscopic diffusion processes in pores, this method may provide quintessential information on the character of molecular propagation for different pore morphologies and fluid phase state. In particular, different modes of molecular diffusion in partially filled pores may be separately probed and the overall diffusion process could be analyzed taking account of the details of the inter-phase coexistence. In addition to the dynamic properties, some information concerning the distribution of guest molecules within the porous matrix may also be obtained.
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Ardelean, I., Farrher, G., Mattea, C., Kimmich, R.: NMR study of the vapor phase contribution to diffusion in partially filled silica glasses with nanometer and micrometer pores. Magn. Reson. Imaging 23, 285–289 (2005)
Barton, T.J., Bull, L.M., Klemperer, W.G., Loy, D.A., McEnaney, B., Misono, M., Monson, P.A., Pez, G., Scherer, G.W., Vartuli, J.C., Yaghi, O.M.: Tailored porous materials. Chem. Mater. 11, 2633–2656 (1999)
Callaghan, P.T.: Principles of Nuclear Magnetic Resonance Microscopy. Clarendon, Oxford (1991)
Callaghan, P.T., Coy, A., MacGowan, D., Packer, K.J., Zelaya, F.O.: Diffraction-like effects in NMR diffusion studies of fluids in porous solids. Nature 351, 467–469 (1991)
Cameron, L.M., Sholl, C.A.: The average jump rate and diffusion in disordered systems. J. Phys. Condens. Matter 11, 4491–4497 (1999)
Choi, J.G., Do, D.D., Do, H.D.: Surface diffusion of adsorbed molecules in porous media: Monolayer, multilayer, and capillary condensation regimes. Ind. Eng. Chem. Res. 40, 4005–4031 (2001)
Courivaud, F., Hansen, E.W., Kolboe, S., Karlsson, A., Stocker, M.: Enhanced n-hexane diffusion in partially filled MCM-41 of different surface hydrophobicity probed by NMR. Microporous Mesoporous Mater. 37, 223–232 (2000)
D’Orazio, F., Bhattacharja, S., Halperin, W.P., Gerhardt, R.: Enhanced self-diffusion of water in restricted geometry. Phys. Rev. Lett. 63, 43–46 (1989)
Dvoyashkin, M., Valiullin, R., Kärger, J.: Temperature effects on phase equilibrium and diffusion in mesopores. Phys. Rev. E 75 (2007)
Everett, D.H.: Adsorption hysteresis. In: Flood, E.A. (ed.) The Solid-Gas Interface, pp. 1055–1113. Dekker, New York (1967)
Gedat, E., Schreiber, A., Findenegg, G.H., Shenderovich, I., Limbach, H.H., Buntkowsky, G.: Stray field gradient NMR reveals effects of hydrogen bonding on diffusion coefficients of pyridine in mesoporous silica. Magn. Reson. Chem. 39, S149–S157 (2001)
Geier, O., Vasenkov, S., Kärger, J.: Pulsed field gradient nuclear magnetic resonance study of long-range diffusion in beds of NaX zeolite: Evidence for different apparent tortuosity factors in the Knudsen and bulk regimes. J. Chem. Phys. 117, 1935–1938 (2002)
Gelb, L.D., Gubbins, K.E., Radhakrishnan, R., Sliwinska-Bartkowiak, M.: Phase separation in confined systems. Rep. Prog. Phys. 62, 1573–1659 (1999)
Gomer, R.: Diffusion of adsorbates on metal-surfaces. Rep. Prog. Phys. 53, 917–1002 (1990)
Kärger, J., Ruthven, D.M.: Diffusion in Zeolites and Other Microporous Solids. Wiley, New York (1992)
Kärger, J., Pfeifer, H., Heink, W.: Principles and application of self-diffusion measurements by nuclear magnetic resonance. Adv. Magn. Reson. 12, 2–89 (1988)
Kärger, J., Valiullin, R., Vasenkov, S.: Molecular dynamics under confinement to one-dimension: options of measurement and accessible information. New J. Phys. 7, 15 (2005)
Kehr, K.W., Mussawisade, K., Schütz, M.G., Wichmann, T.: Diffusion of particles on lattices. In: Heitjans, P., Kärger, J. (eds.) Diffusion in Condensed Matter. Springer, Berlin (2005)
Kikkinides, E.S., Kainourgiakis, M.E., Stefanopoulos, K.L., Mitropoulos, A.C., Stubos, A.K., Kanellopoulos, N.K.: Combination of small angle scattering and three-dimensional stochastic reconstruction for the study of adsorption-desorption processes in Vycor porous glass. J. Chem. Phys. 112, 9881–9887 (2000)
Kimmich, R.: NMR: Tomography, Diffusometry, Relaxometry. Springer, Berlin (1997)
Levitz, P.: Knudsen diffusion and excitation transfer in random porous-media. J. Phys. Chem. 97, 3813–3818 (1993)
Monson, P.A.: Recent progress in molecular modeling of adsorption and hysteresis in mesoporous materials. Adsorption 11, 29–35 (2005)
Naumov, S., Valiullin, R., Galvosas, P., Kärger, J., Monson, P.A.: Diffusion hysteresis in mesoporous materials. Eur. Phys. J. Special Topics 141, 107–112 (2007)
Pollard, W.G., Present, R.D.: On gaseous self-diffusion in long capillary tubes. Phys. Rev. 73, 762–774 (1948)
Price, W.S.: Pulsed-field gradient nuclear magnetic resonance as a tool for studying translational diffusion. 1. Basic theory. Concepts Magn. Reson. 9, 299–336 (1997)
Riccardo, J.L., Chade, M.A., Pereyra, V.D., Zgrablich, G.: Adsorption and surface-diffusion on generalized heterogeneous surfaces. Langmuir 8, 1518–1531 (1992)
Rudzinski, W., Everett, D.H.: Adsorption of Gases on Heterogeneous Surfaces. Academic, New York (1992)
Schüth, F., Sing, K.S.W., Weitkamp, J. (eds.): Handbook of Porous Solids. Wiley-VCH (2002)
Sen, P.N.: Time-dependent diffusion coefficient as a probe of geometry. Concepts Magn. Reson. A 23A, 1–21 (2004)
Stallmach, F., Kärger, J.: The potentials of pulsed field gradient NMR for investigation of porous media. Adsorpt. J. Int. Adsorpt. Soc. 5, 117–133 (1999)
Stapf, S., Han, S. (eds.): NMR Imaging in Chemical Engineering. Wiley-VCH, Weinheim (2005)
Steele, W.A.: The Interaction of Gases with Solid Surfaces. Pergamon, New York (1974)
Valiullin, R., Skirda, V.D., Stapf, S., Kimmich, R.: Molecular exchange processes in partially filled porous glass as seen with NMR diffusometry. Phys. Rev. E 55, 2664–2671 (1997)
Valiullin, R., Kortunov, P., Kärger, J., Timoshenko, V.: Concentration-dependent self-diffusion of liquids in nanopores: A nuclear magnetic resonance study. J. Chem. Phys. 120, 11804–11814 (2004)
Valiullin, R., Kortunov, P., Kärger, J., Timoshenko, V.: Concentration-dependent self-diffusion of adsorbates in mesoporous materials. Magn. Reson. Imaging 23, 209–213 (2005a)
Valiullin, R., Kortunov, P., Kärger, J., Timoshenko, V.: Surface self-diffusion of organic molecules adsorbed in porous silicon. J. Phys. Chem. B 109, 5746–5752 (2005b)
Valiullin, R., Naumov, S., Galvosas, P., Kärger, J., Woo, H.J., Porcheron, F., Monson, P.A.: Exploration of molecular dynamics during transient sorption of fluids in mesoporous materials. Nature 443, 965–968 (2006)
Veith, S.R., Hughes, E., Vuataz, G., Pratsinis, S.E.: Restricted diffusion in silica particles measured by pulsed field gradient NMR. J. Colloid Interface Sci. 274, 216–228 (2004)
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Valiullin, R., Dvoyashkin, M. Diffusion processes in mesoporous adsorbents probed by NMR. Adsorption 13, 239–245 (2007). https://doi.org/10.1007/s10450-007-9053-1
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DOI: https://doi.org/10.1007/s10450-007-9053-1