Frozen Acrylamide Gels as Dynamic Nuclear Polarization Matrices.

Authors :: Viger-Gravel J
Berruyer P
Gajan D
Basset JM
Lesage A
Tordo P
Ouari O
Emsley L
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2017 Jul 17; Vol. 56 (30), pp. 8726-8730. Date of Electronic Publication: 2017 Jun 19.
Publication Year :: 2017
Abstract: 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 <superscript>113</superscript> Cd spectra from CdTe-COOH NPs in minutes. The spectra clearly indicate a highly disordered cadmium-rich surface.<br /> (© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)