Gurinov, Andrei, Benedikt Sieland, Andrey Kuzhelev, Hossam Elgabarty, Thomas D. Kühne, Thomas Prisner, Jan Paradies, Marc Baldus, Konstantin L. Ivanov, and Svetlana Pylaeva. “Mixed‐Valence Compounds as Polarizing Agents for Overhauser Dynamic Nuclear Polarization in Solids.” Angewandte Chemie International Edition 60, no. 28 (July 5, 2021): 15371–75.
https://doi.org/10.1002/anie.202103215.
In this paper we investigate a novel set of polarizing agents – mixed-valence compounds – by theoretical and experimental methods and demonstrate their performance in high-field Dynamic Nuclear Polarization (DNP) NMR experiments in the solid state. Mixed-valence compounds constitute a group of molecules, in which molecular mobility persists even in solids. Consequently, such polarizing agents can be used to perform Overhauser-DNP experiments in solid-state, with favorable conditions for dynamic nuclear polarization formation at ultrahigh magnetic fields.