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research article

F-19 Magic Angle Spinning Dynamic Nuclear Polarization Enhanced NMR Spectroscopy

Viger-Gravel, Jasmine  
•
Avalos, Claudia E.  
•
Kubicki, Dominik J.  
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May 27, 2019
Angewandte Chemie International Edition

The introduction of high-frequency, high-power microwave sources, tailored biradicals, and low-temperature magic angle spinning (MAS) probes has led to a rapid development of hyperpolarization strategies for solids and frozen solutions, leading to large gains in NMR sensitivity. Here, we introduce a protocol for efficient hyperpolarization of F-19 nuclei in MAS DNP enhanced NMR spectroscopy. We identified trifluoroethanol-d(3) as a versatile glassy matrix and show that 12mm AMUPol (with microcrystalline KBr) provides direct F-19 DNP enhancements of over 100 at 9.4T. We applied this protocol to obtain DNP-enhanced F-19 and F-19-C-13 cross-polarization (CP) spectra for an active pharmaceutical ingredient and a fluorinated mesostructured hybrid material, using incipient wetness impregnation, with enhancements of approximately 25 and 10 in the bulk solid, respectively. This strategy is a general and straightforward method for obtaining enhanced F-19 MAS spectra from fluorinated materials.

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Type
research article
DOI
10.1002/anie.201814416
Web of Science ID

WOS:000474803100008

Author(s)
Viger-Gravel, Jasmine  
•
Avalos, Claudia E.  
•
Kubicki, Dominik J.  
•
Gajan, David
•
Lelli, Moreno
•
Ouari, Olivier
•
Lesage, Anne
•
Emsley, Lyndon  
Date Issued

2019-05-27

Publisher

Wiley-VCH Verlag GmbH

Published in
Angewandte Chemie International Edition
Volume

58

Issue

22

Start page

7249

End page

7253

Subjects

Chemistry, Multidisciplinary

•

Chemistry

•

active pharmaceutical ingredients

•

dynamic nuclear polarization

•

magic angle spinning

•

nmr spectroscopy

•

solid-state nmr

•

magnetic-resonance

•

polarizing agent

•

overhauser-dnp

•

hyperpolarization

•

efficient

•

h-1

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LRM  
Available on Infoscience
August 1, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/159492
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