Ultrawideline dynamic nuclear polarization (DNP)-enhanced (195)Pt solid-state NMR (SSNMR) spectroscopy and theoretical calculations are used to determine the coordination of atomic Pt species supported within the pores of metal-organic frameworks (MOFs). The (195)Pt SSNMR spectra, with breadths reaching 10000 ppm, were obtained by combining DNP with broadbanded cross-polarization and CPMG acquisition. Although the DNP enhancements in static samples are lower than those typically observed under magic-angle spinning conditions, the presented measurements would be very challenging using the conventional SSNMR methods. The DNP-enhanced ultrawideline NMR spectra served to separate signals from cis- and trans-coordinated atomic Pt(2+) species supported on the UiO-66-NH2 MOF. Additionally, the data revealed a dominance of kinetic effects in the formation of Pt(2+) complexes and the thermodynamic effects in their reduction to nanoparticles. A single cis-coordinated Pt(2+) complex was confirmed in MOF-253.
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A NewTool for NMR Crystallography: Complete 13C/15N Assignment of Organic Molecules at NaturalIsotopic Abundance Using DNP-Enhanced Solid-State NMR
A NewTool for NMR Crystallography: Complete 13C/15N Assignment of Organic Molecules at NaturalIsotopic Abundance Using DNP-Enhanced Solid-State NMR
Katharina Ma?rker, Morgane Pingret, Jean-Marie Mouesca, Didier Gasparutto, Sabine Hediger and Gae?l De Pae?pe
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/jacs.5b09964/20151026/images/medium/ja-2015-099645_0004.gif
Journal of the American Chemical Society
DOI: 10.1021/jacs.5b09964
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA...
[NMR paper] Solid-state NMR studies of metal-free SOD1 fibrillar structures.
Solid-state NMR studies of metal-free SOD1 fibrillar structures.
Related Articles Solid-state NMR studies of metal-free SOD1 fibrillar structures.
J Biol Inorg Chem. 2014 Apr 10;
Authors: Banci L, Blaževitš O, Cantini F, Danielsson J, Lang L, Luchinat C, Mao J, Oliveberg M, Ravera E
Abstract
Copper-zinc superoxide dismutase 1 (SOD1) is present in the protein aggregates deposited in motor neurons of amyotrophic lateral sclerosis (ALS) patients. ALS is a neurodegenerative disease that can be either sporadic (ca. 90*%) or familial...
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04-11-2014 02:51 PM
Probing (27)Al-(13)C proximities in metal-organic frameworks using dynamic nuclear polarization enhanced NMR spectroscopy
From The DNP-NMR Blog:
Probing (27)Al-(13)C proximities in metal-organic frameworks using dynamic nuclear polarization enhanced NMR spectroscopy
Pourpoint, F., et al., Probing (27)Al-(13)C proximities in metal-organic frameworks using dynamic nuclear polarization enhanced NMR spectroscopy. Chem Commun (Camb), 2013. 50(8): p. 933-5.
http://www.ncbi.nlm.nih.gov/pubmed/24301188
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01-30-2014 05:27 AM
NMR studies of alkali metal ions in organic and biological solids
NMR studies of alkali metal ions in organic and biological solids
February 2012
Publication year: 2012
Source:Progress in Nuclear Magnetic Resonance Spectroscopy, Volume 61</br>
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Highlights
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12-15-2012 09:51 AM
NMR studies of alkali metal ions in organic and biological solids
NMR studies of alkali metal ions in organic and biological solids
Publication year: 2011
Source: Progress in Nuclear Magnetic Resonance Spectroscopy, In Press, Accepted Manuscript, Available online 13 June 2011</br>
Gang, Wu , Jianfeng, Zhu</br>
*Highlights:*? Comprehensive review of NMR of alkali metal ions in organic/biological solids ? Experimental solid-state NMR techniques and computational methods ? Survey of experimental alkali metal NMR data for organic/biological solids</br></br>
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DNP-Enhanced Ultrawideline Solid-State NMR Spectroscopy: Studies of Platinum in Metal-Organic Frameworks #DNPNMR
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