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Default Improved strategies for DNP-enhanced 2D 1H-X heteronuclear correlation spectroscopy of surfaces #DNPNMR

From The DNP-NMR Blog:

Improved strategies for DNP-enhanced 2D 1H-X heteronuclear correlation spectroscopy of surfaces #DNPNMR

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Kobayashi, T., et al., Improved strategies for DNP-enhanced 2D 1H-X heteronuclear correlation spectroscopy of surfaces. Solid State Nucl Magn Reson, 2017. 87(Supplement C): p. 38-44.


https://www.ncbi.nlm.nih.gov/pubmed/28834782


We demonstrate that dynamic nuclear polarization (DNP)-enhanced 1H-X heteronuclear correlation (HETCOR) measurements of hydrogen-rich surface species are better accomplished by using proton-free solvents. This approach notably prevents HETCOR spectra from being obfuscated by the solvent-derived signals otherwise present in DNP measurements. Additionally, in the hydrogen-rich materials studied here, which included functionalized mesoporous silica nanoparticles and metal organic frameworks, the use of proton-free solvents afforded higher sensitivity gains than the commonly used solvents containing protons. We also explored the possibility of using a solvent-free sample formulation and the feasibility of indirect detection in DNP-enhanced HETCOR experiments.
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