High-resolution NMR of hydrogen in organic solids by DNP enhanced natural abundance deuterium spectroscopy

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High-resolution NMR of hydrogen in organic solids by DNP enhanced natural abundance deuterium spectroscopy

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02-09-2016, 04:21 AM

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High-resolution NMR of hydrogen in organic solids by DNP enhanced natural abundance deuterium spectroscopy

From The DNP-NMR Blog:

High-resolution NMR of hydrogen in organic solids by DNP enhanced natural abundance deuterium spectroscopy

Rossini, A.J., et al., High-resolution NMR of hydrogen in organic solids by DNP enhanced natural abundance deuterium spectroscopy. J Magn Reson, 2015. 259: p. 192-8.

http://www.ncbi.nlm.nih.gov/pubmed/26363582

We demonstrate that high field (9.4 T) dynamic nuclear polarization (DNP) at cryogenic ( approximately 100 K) sample temperatures enables the rapid acquisition of natural abundance (1)H-(2)H cross-polarization magic angle spinning (CPMAS) solid-state NMR spectra of organic solids. Spectra were obtained by impregnating substrates with a solution of the stable DNP polarizing agent TEKPol in tetrachloroethane. Tetrachloroethane is a non-solvent for the solids, and the unmodified substrates are then polarized through spin diffusion. High quality natural abundance (2)H CPMAS spectra of histidine hydrochloride monohydrate, glycylglycine and theophylline were acquired in less than 2h, providing direct access to hydrogen chemical shifts and quadrupolar couplings. The spectral resolution of the (2)H solid-state NMR spectra is comparable to that of (1)H spectra obtained with state of the art homonuclear decoupling techniques.

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