Abstract
Electron spin resonance (ESR) techniques, used with suitable paramagnetic probe ions, are applied to the structural characterisation of micro- and mesoporous inorganic solids. The structural information available is enhanced through the pulsed ESR technique, electron spin echo modulation (ESEM) spectroscopy, which can often resolve weak electron-nuclear hyperfine interactions unresolved in the continuous wave spectrum. Examples are described in which modulation associated with coupled 2D nuclei is used to characterise interactions between paramagnetic probe ions and adsorbed solvents and organic reactant molecules on clays and zeolites. In clays and pillared clays spin echo modulation associated with weak electronnuclear hyperfine coupling with27 Al nuclei provides evidence for interactions between exchangeable cations and both framework and pillar aluminium atoms.
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Brown, D.R. (1993). Pulsed ESR Applied to Microporous and Mesoporous Inorganic Solids. In: Sequeira, C.A.C., Hudson, M.J. (eds) Multifunctional Mesoporous Inorganic Solids. NATO ASI Series, vol 400. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8139-4_30
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DOI: https://doi.org/10.1007/978-94-015-8139-4_30
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