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.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International 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.