Affiliation:
1. Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
2. Current address: National High Magnetic Field Laboratory Florida State University Tallahassee FL 32310 USA
3. Aix Marseille Univ, CNRS Institut de Chimie Radicalaire UMR 7273 13013 Marseille France
4. Laboratory of Physical Chemistry Department of Chemistry ETH Zürich 8093 Zürich Switzerland
Abstract
AbstractWe evaluate the overall sensitivity gains provided by a series of eighteen nitroxide biradicals for dynamic nuclear polarization (DNP) solid‐state NMR at 9.4 T and 100 K, including eight new biradicals. We find that in the best performing group the factors contributing to the overall sensitivity gains, namely the DNP enhancement, the build‐up time, and the contribution factor, often compete with each other leading to very similar overall sensitivity across a range of biradicals. NaphPol and HydroPol are found to provide the best overall sensitivity factors, in organic and aqueous solvents respectively. One of the new biradicals, AMUPolCbm, provides high sensitivity for all three solvent formulations measured here, and can be considered to be a “universal” polarizing agent.
Funder
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Horizon 2020 Framework Programme
Agence Nationale de la Recherche
H2020 Marie Skłodowska-Curie Actions
Cited by
4 articles.
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