1H–31P HETCOR NMR elucidates the nature of acid sites in zeolite HZSM-5 probed with trimethylphosphine oxide

1H–31P HETCOR NMR elucidates the nature of acid sites in zeolite HZSM-5 probed with trimethylphosphine oxide

Two-dimensional 1H–31P heteronuclear correlation NMR of trimethylphosphine oxide (TMPO) adsorbed in zeolites, in tandem with DFT calculations, challenges previous one-dimensional 31P NMR assignments, enabling the unambiguous discrimination of Brønsted and Lewis acid sites, extending the understandin...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2019-10, Vol.55 (84), p.12635-12638
Hauptverfasser: Bornes, Carlos, Sardo, Mariana, Lin, Zhi, Amelse, Jeffrey, Fernandes, Auguste, Ribeiro, Maria Filipa, Geraldes, Carlos, Rocha, João, Mafra, Luís
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Sprache:eng
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Lewis acid
NMR
Nuclear magnetic resonance
Stoichiometry
Zeolites
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container_issue 84
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container_title Chemical communications (Cambridge, England)
container_volume 55
creator Bornes, Carlos
Sardo, Mariana
Lin, Zhi
Amelse, Jeffrey
Fernandes, Auguste
Ribeiro, Maria Filipa
Geraldes, Carlos
Rocha, João
Mafra, Luís
description Two-dimensional 1H–31P heteronuclear correlation NMR of trimethylphosphine oxide (TMPO) adsorbed in zeolites, in tandem with DFT calculations, challenges previous one-dimensional 31P NMR assignments, enabling the unambiguous discrimination of Brønsted and Lewis acid sites, extending the understanding of TMPO:Brønsted complexes formed with distinct stoichiometries at the HZSM-5 zeolite surface, and the proton-transfer mechanism.
doi_str_mv 10.1039/c9cc06763a
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source Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection
subjects Lewis acid
NMR
Nuclear magnetic resonance
Stoichiometry
Zeolites
title 1H–31P HETCOR NMR elucidates the nature of acid sites in zeolite HZSM-5 probed with trimethylphosphine oxide
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