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Default Acidity Strength of Solid Catalysts Probed by Hyperpolarized Natural Abundance 17O NMR Spectroscopy

Acidity Strength of Solid Catalysts Probed by Hyperpolarized Natural Abundance 17O NMR Spectroscopy


Observation of Brønsted acid sites: By enhancing the solid-state NMR signals of 17O at natural abundance with dynamic nuclear polarization (DNP), Pruski et al. were able to measure oxygen–proton distances accurately with sub-picometer precision. The results give insight into the Brønsted acidity of a range of solid acid catalysts.

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