Supercritical CO 2 impregnation process applied to polymer samples preparation for dynamic nuclear polarization solid‐state NMR - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Magnetic Resonance in Chemistry Année : 2022

Supercritical CO 2 impregnation process applied to polymer samples preparation for dynamic nuclear polarization solid‐state NMR

Résumé

In this study, supercritical CO2 (scCO2) was used to impregnate polymers with paramagnetic polarizing agents to prepare samples for dynamic nuclear polarization (DNP) solid-state NMR (ssNMR) experiments. As a proof of concept, we impregnated polystyrene samples with bTbK, which stands for bis-TEMPO-bisketal where TEMPO is 2,2,6,6-tetra-methylpiperindin-1-oxyl. Substantial DNP signal enhancements could be measured on DNP-enhanced 1H → 13C cross-polarization (CP) magic-angle spinning (MAS) spectra recorded at 9.4 T and ~100 K, reaching a maximum value of 8 in the most favorable case, which appeared comparable or even higher than what is typically obtained on similar systems for former sample preparation methods. These results highlight the potential of scCO2 impregnation as an efficient and possibly versatile methodology to prepare polymer samples for DNP ssNMR investigations.
Fichier principal
Vignette du fichier
Magnetic Reson in Chemistry - 2022 - Le - Supercritical CO2 impregnation process applied to polymer samples preparation for.pdf (1018.35 Ko) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-03777975 , version 1 (23-11-2022)

Identifiants

Citer

Dao Le, Amélie Frison, Yasmine Masmoudi, Abir Bouledjouidja, Pierre Thureau, et al.. Supercritical CO 2 impregnation process applied to polymer samples preparation for dynamic nuclear polarization solid‐state NMR. Magnetic Resonance in Chemistry, 2022, 60 (12), pp.1171-1177. ⟨10.1002/mrc.5307⟩. ⟨hal-03777975⟩
39 Consultations
36 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More