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

Authors :
Luís Mafra
Auguste Fernandes
Jeffrey Amelse
João Rocha
Zhi Lin
Carlos F. G. C. Geraldes
Maria Filipa Ribeiro
Mariana Sardo
Carlos Bornes
Source :
Chemical Communications. 55:12635-12638
Publication Year :
2019
Publisher :
Royal Society of Chemistry (RSC), 2019.

Abstract

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 Bronsted and Lewis acid sites, extending the understanding of TMPO:Bronsted complexes formed with distinct stoichiometries at the HZSM-5 zeolite surface, and the proton-transfer mechanism.

Details

ISSN :
1364548X and 13597345
Volume :
55
Database :
OpenAIRE
Journal :
Chemical Communications
Accession number :
edsair.doi...........cdfe38de9d49bfcd13f7ea480432d9c6
Full Text :
https://doi.org/10.1039/c9cc06763a