sup.31Р NMR Spectroscopy of Adsorbed Probe Molecules as a Tool for the Determination of the Acidity of Molecular Sieve Catalysts

sup.31Р NMR Spectroscopy of Adsorbed Probe Molecules as a Tool for the Determination of the Acidity of Molecular Sieve Catalysts

The review analyzes the potential of .sup.31Р MAS NMR spectroscopy of adsorbed trisubstituted phosphines and phosphine oxides for the investigation of the acidic properties of molecular sieve catalysts. The main methodological approaches to identifying sites of different types are considered. The a...

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Veröffentlicht in:Petroleum chemistry 2021-08, Vol.61 (8), p.875
Hauptverfasser: Zasukhin, D. S, Kostyukov, I. A, Kasyanov, I. A, Kolyagin, Yu. G, Ivanova, I. I
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Catalysts
Nuclear magnetic resonance spectroscopy
Oxides
Zeolites
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container_issue 8
container_start_page 875
container_title Petroleum chemistry
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creator Zasukhin, D. S
Kostyukov, I. A
Kasyanov, I. A
Kolyagin, Yu. G
Ivanova, I. I
description The review analyzes the potential of .sup.31Р MAS NMR spectroscopy of adsorbed trisubstituted phosphines and phosphine oxides for the investigation of the acidic properties of molecular sieve catalysts. The main methodological approaches to identifying sites of different types are considered. The assignment of signals in the .sup.31Р MAS NMR spectra of methyl-, ethyl-, n-butyl-, and phenyl-substituted phosphines and their oxides adsorbed on zeolites of different structural types and other molecular sieves to Lewis and Brønsted acid sites is reported, and the potential of .sup.31Р MAS NMR spectroscopy as a tool for the determination of the strength of these sites and their amount is analyzed. It is shown that varying the size of the substituent allows assessment of the localization and accessibility of acid sites in zeolites.
doi_str_mv 10.1134/S0965544121080107
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subjects Catalysts
Nuclear magnetic resonance spectroscopy
Oxides
Zeolites
title sup.31Р NMR Spectroscopy of Adsorbed Probe Molecules as a Tool for the Determination of the Acidity of Molecular Sieve Catalysts
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