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.
[NMR paper] Natural Abundance 17O DNP NMR Provides Precise O-H Distances and Insights into the Brønsted Acidity of Heterogeneous Catalysts
Natural Abundance 17O DNP NMR Provides Precise O-H Distances and Insights into the Brønsted Acidity of Heterogeneous Catalysts
Brønsted acidic sites on catalyst surfaces are observed by 17O dynamic nuclear polarization-enhanced NMR spectroscopy, which hyperpolarizes nuclei by microwave-induced saturation of electrons. In their Communication (DOI: 10.1002/anie.201704032), M. Pruski et al. report the measurement of O-H distances with sub-picometer precision. The length of the O-H bond is directly related to the Brønsted acidity of the sites and is also a reporter of the formation of...
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06-12-2017 01:48 PM
[NMR paper] Hydrogen bond strength in membrane proteins probed by time-resolved (1)H-detected solid-state NMR and MD simulations.
Hydrogen bond strength in membrane proteins probed by time-resolved (1)H-detected solid-state NMR and MD simulations.
Related Articles Hydrogen bond strength in membrane proteins probed by time-resolved (1)H-detected solid-state NMR and MD simulations.
Solid State Nucl Magn Reson. 2017 Mar 18;:
Authors: Medeiros-Silva J, Jekhmane S, Baldus M, Weingarth M
Abstract
(1)H-detected solid-state NMR in combination with (1)H/(2)D exchange steps allows for the direct identification of very strong hydrogen bonds in membrane proteins....
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03-28-2017 03:06 PM
Hyperpolarized NMR of plant and cancer cell extracts at natural abundance
From The DNP-NMR Blog:
Hyperpolarized NMR of plant and cancer cell extracts at natural abundance
Dumez, J.N., et al., Hyperpolarized NMR of plant and cancer cell extracts at natural abundance. Analyst, 2015. 140(17): p. 5860-3.
http://www.ncbi.nlm.nih.gov/pubmed/26215673
Natural Abundance 17O DNP Two-Dimensional and Surface-Enhanced NMR Spectroscopy
Natural Abundance 17O DNP Two-Dimensional and Surface-Enhanced NMR Spectroscopy
Fre?de?ric A. Perras, Takeshi Kobayashi and Marek Pruski
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/jacs.5b03905/20150629/images/medium/ja-2015-03905b_0003.gif
Journal of the American Chemical Society
DOI: 10.1021/jacs.5b03905
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/jacsat/~4/2XY9E0YdGEg
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06-29-2015 07:21 PM
Matrix-free dynamic nuclear polarization enables solid-state NMR (13)C-(13)C correlation spectroscopy of proteins at natural isotopic abundance
From The DNP-NMR Blog:
Matrix-free dynamic nuclear polarization enables solid-state NMR (13)C-(13)C correlation spectroscopy of proteins at natural isotopic abundance
Takahashi, H., S. Hediger, and G. De Paepe, Matrix-free dynamic nuclear polarization enables solid-state NMR (13)C-(13)C correlation spectroscopy of proteins at natural isotopic abundance. Chem Commun (Camb), 2013. 49(82): p. 9479-81.
http://www.ncbi.nlm.nih.gov/pubmed/24013616
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11-21-2013 01:14 AM
[NMR paper] Matrix-free dynamic nuclear polarization enables solid-state NMR (13)C-(13)C correlation spectroscopy of proteins at natural isotopic abundance.
Matrix-free dynamic nuclear polarization enables solid-state NMR (13)C-(13)C correlation spectroscopy of proteins at natural isotopic abundance.
Matrix-free dynamic nuclear polarization enables solid-state NMR (13)C-(13)C correlation spectroscopy of proteins at natural isotopic abundance.
Chem Commun (Camb). 2013 Sep 6;
Authors: Takahashi H, Hediger S, De Paëpe G
Abstract
We introduce a general approach for dynamic nuclear polarization (DNP) enhanced solid-state NMR that overcomes the current problems in DNP experiments caused by the use...
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09-10-2013 08:44 PM
Identifying Guanosine Self Assembly at Natural Isotopic Abundance by High-Resolution 1H and 13C Solid-State NMR Spectroscopy
Identifying Guanosine Self Assembly at Natural Isotopic Abundance by High-Resolution 1H and 13C Solid-State NMR Spectroscopy
Amy L. Webber, Stefano Masiero, Silvia Pieraccini, Jonathan C. Burley, Andrew S. Tatton, Dinu Iuga, Tran N. Pham, Gian Piero Spada and Steven P. Brown
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja206516u/aop/images/medium/ja-2011-06516u_0007.gif
Journal of the American Chemical Society
DOI: 10.1021/ja206516u
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA...