Mixed‐Valence Compounds as Polarizing Agents for Overhauser Dynamic Nuclear Polarization in Solids**

다국어 초록 (Multilingual Abstract)

Herein, 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 the solid state, with favorable conditions for dynamic nuclear polarization formation at ultra‐high magnetic fields.
Mixed‐valence compounds were investigated as novel polarizing agents for DNP NMR. These compounds constitute a group of molecules in which molecular mobility persists even in solids. Consequently, they can be used to perform Overhauser‐DNP NMR experiments in solid state, and they specifically show favorable properties for applications at ultra‐high magnetic fields (DNP=dynamic nuclear polarization, NMR=nuclear magnetic resonance).