Deactivation of catalysts in simultaneous reversible and irreversible parahydrogen NMR signal enhancement, and the role of co-ligands in the stabilization of the reversible method.
Journal
RSC advances
ISSN: 2046-2069
Titre abrégé: RSC Adv
Pays: England
ID NLM: 101581657
Informations de publication
Date de publication:
23 May 2022
23 May 2022
Historique:
received:
06
05
2022
accepted:
23
05
2022
entrez:
23
6
2022
pubmed:
24
6
2022
medline:
24
6
2022
Statut:
epublish
Résumé
Signal Amplification by Reversible Exchange (SABRE) and hydrogeneable Parahydrogen Induced Polarization (hPHIP) can enhance weak NMR signals, and thus increase the range of NMR applications. Here, using an N-heterocyclic carbene Ir-based catalyst, simultaneous SABRE and hPHIP was achieved for the compound with an N-donor site and an acetylene triple bond. It was demonstrated that the interplay between SABRE and hPHIP can be manipulated. Specifically, it was found that the hPHIP effect could be almost completely suppressed, while stable SABRE was observed in subsequent consecutive experiments. The presented results have the potential to increase the numbers of parahydrogen hyperpolarizable molecules.
Identifiants
pubmed: 35733673
doi: 10.1039/d2ra02872g
pii: d2ra02872g
pmc: PMC9136854
doi:
Types de publication
Journal Article
Langues
eng
Pagination
15986-15991Informations de copyright
This journal is © The Royal Society of Chemistry.
Déclaration de conflit d'intérêts
Authors declare no conflict of interests.
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