Frozen Acrylamide Gels as Dynamic Nuclear Polarization Matrices.
Angew Chem Int Ed Engl
; 56(30): 8726-8730, 2017 07 17.
Article
em En
| MEDLINE
| ID: mdl-28544173
ABSTRACT
Aqueous acrylamide gels can be used to provide dynamic nuclear polarization (DNP) NMR signal enhancements of around 200 at 9.4â
T and 100â
K. The enhancements are shown to increase with crosslinker concentration and low concentrations of the AMUPol biradical. This DNP matrix can be used in situations where conventional incipient wetness methods fail, such as to obtain DNP surface enhanced NMR spectra from inorganic nanoparticles. In particular, we obtain 113 Cd spectra from CdTe-COOH NPs in minutes. The spectra clearly indicate a highly disordered cadmium-rich surface.
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MEDLINE
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En
Ano de publicação:
2017
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Article