Frozen Acrylamide Gels as Dynamic Nuclear Polarization Matrices

Aqueous acrylamide gels can be used to provide dynamic nuclear polarization (DNP) NMR signal enhancements of around 200 at 9.4 T and 100 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 Cd-113 spectra from CdTe-COOH NPs in minutes. The spectra clearly indicate a highly disordered cadmium-rich surface.


Published in:
Angewandte Chemie-International Edition, 56, 30, 8726-8730
Year:
2017
ISSN:
1433-7851
Keywords:
Laboratories:


Note: The file is under embargo until: 2018-07-07


 Record created 2017-09-05, last modified 2018-12-03

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