TY - JOUR
T1 - Frozen Acrylamide Gels as Dynamic Nuclear Polarization Matrices.
AU - Viger-Gravel, Jasmine
AU - Berruyer, Pierrick
AU - Gajan, David
AU - Basset, Jean-Marie
AU - Lesage, Anne
AU - Tordo, Paul
AU - Ouari, Olivier
AU - Emsley, Lyndon
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by ERC Advanced Grant No. 320860. We thank Dr. B.J. Walder for help in processing the PASS data, Dr. C. Chamignon for assistance with quantitative liquid-state NMR, and Dr. D. Cala for her insight and advice in gel synthesis.
PY - 2017/6/19
Y1 - 2017/6/19
N2 - We show that 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 cross linker concentration and low concentrations of the AMUPol biradical. We show that 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 113Cd spectra from CdTe-COOH NPs in minutes. The spectra clearly indicate a highly-disordered cadmium rich surface.
AB - We show that 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 cross linker concentration and low concentrations of the AMUPol biradical. We show that 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 113Cd spectra from CdTe-COOH NPs in minutes. The spectra clearly indicate a highly-disordered cadmium rich surface.
UR - http://hdl.handle.net/10754/623764
UR - http://onlinelibrary.wiley.com/doi/10.1002/anie.201703758/abstract
UR - http://www.scopus.com/inward/record.url?scp=85021183093&partnerID=8YFLogxK
U2 - 10.1002/anie.201703758
DO - 10.1002/anie.201703758
M3 - Article
C2 - 28544173
SN - 1433-7851
VL - 56
SP - 8726
EP - 8730
JO - Angewandte Chemie International Edition
JF - Angewandte Chemie International Edition
IS - 30
ER -