NMR diffusometry with guest molecules in nanoporous materials

Seungtaik Hwang; Jörg Kärger

doi:10.1016/j.mri.2018.08.010

NMR diffusometry with guest molecules in nanoporous materials

Magn Reson Imaging. 2019 Feb:56:3-13. doi: 10.1016/j.mri.2018.08.010. Epub 2018 Oct 12.

Authors

Seungtaik Hwang¹, Jörg Kärger²

Affiliations

¹ Faculty of Physics and Earth Sciences, Leipzig University, Leipzig, Germany.
² Faculty of Physics and Earth Sciences, Leipzig University, Leipzig, Germany. Electronic address: kaerger@physik.uni-leipzig.de.

PMID: 30322668
DOI: 10.1016/j.mri.2018.08.010

Abstract

Application of pulsed field gradient (PFG) NMR to studying molecular diffusion in beds of nanoporous materials has given rise to novel insights and paradigm shifts in our understanding, which are reviewed in the present contribution. This gain in information is, in particular, related to the ability of PFG NMR to discriminate between various mechanisms affecting mass transfer in such systems. Examples include, inter alia, the sensitivity of PFG NMR toward transport enhancement in pore hierarchies as well as toward transport resistances acting, in addition to the diffusional resistance of the genuine pore space, either on the crystal surfaces or in their interior.

Publication types

Research Support, Non-U.S. Gov't
Review

MeSH terms

Diffusion*
Image Processing, Computer-Assisted / methods*
Magnetic Resonance Spectroscopy / methods*
Nanopores*
Porosity