Improved strategies for DNP-enhanced 2D 1H-X heteronuclear correlation spectroscopy of surfaces
Chemistry, Ames Laboratory
Journal or Book Title
Solid State Nuclear Magnetic Resonance
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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Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License
Kobayashi, Takeshi; Perras, Frédéric A.; Chaudhary, Umesh; Slowing, Igor I.; Huang, Wenyu; Sadow, Aaron D.; and Pruski, Merek, "Improved strategies for DNP-enhanced 2D 1H-X heteronuclear correlation spectroscopy of surfaces" (2017). Chemistry Publications. 996.