Natural abundance solid-state 95Mo MAS NMR of MoS2 reveals precise 95Mo anisotropic parameters from its central and satellite transitions

2010 ◽  
Vol 46 (12) ◽  
pp. 2103 ◽  
Author(s):  
Hans J. Jakobsen ◽  
Henrik Bildsøe ◽  
Jørgen Skibsted ◽  
Michael Brorson ◽  
Kjeld Schaumburg
Keyword(s):  
Solid State ◽  
Mas Nmr ◽  
Natural Abundance

New opportunities in acquisition and analysis of natural abundance complex solid-state 33S MAS NMR spectra: (CH3NH3)2WS4

2009 ◽  
Vol 11 (32) ◽  
pp. 6981 ◽  
Author(s):  
Hans J. Jakobsen ◽  
Henrik Bildsøe ◽  
Jørgen Skibsted ◽  
Michael Brorson ◽  
Bikshandarkoil R. Srinivasan ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
Natural Abundance

scholarly journals Acceleration of natural-abundance solid-state MAS NMR measurements on bone by paramagnetic relaxation from gadolinium-DTPA

2014 ◽  
Vol 244 ◽  
pp. 90-97 ◽  
Author(s):  
Kamal H. Mroue ◽  
Rongchun Zhang ◽  
Peizhi Zhu ◽  
Erin McNerny ◽  
David H. Kohn ◽  
...  
Keyword(s):  
Solid State ◽  
Paramagnetic Relaxation ◽  
Mas Nmr ◽  
Natural Abundance ◽  
Gadolinium Dtpa

scholarly journals Dynamic nuclear polarisation enhanced14N overtone MAS NMR spectroscopy

2014 ◽  
Vol 16 (25) ◽  
pp. 12890-12899 ◽  
Author(s):  
Aaron J. Rossini ◽  
Lyndon Emsley ◽  
Luke A. O'Dell
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Signal Enhancement ◽  
Mas Nmr ◽  
Natural Abundance ◽  
Dynamic Nuclear Polarisation ◽  
Nuclear Polarisation

Dynamic nuclear polarisation has been used to obtain solid-state14N overtone NMR spectra with signal enhancement levels of over two orders of magnitude, including natural abundance C–N and H–N correlation spectra.

Sensitivity enhancement in natural-abundance solid-state 33S MAS NMR spectroscopy employing adiabatic inversion pulses to the satellite transitions

2008 ◽  
Vol 190 (2) ◽  
pp. 316-326 ◽  
Author(s):  
Michael Ryan Hansen ◽  
Michael Brorson ◽  
Henrik Bildsøe ◽  
Jørgen Skibsted ◽  
Hans J. Jakobsen
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Sensitivity Enhancement ◽  
Mas Nmr ◽  
Natural Abundance ◽  
Adiabatic Inversion ◽  
Inversion Pulses

The Nature of Chemisorbed CO2 in Zeolite A

2019 ◽  
Author(s):  
Przemyslaw Rzepka ◽  
Zoltán Bacsik ◽  
Andrew J. Pell ◽  
Niklas Hedin ◽  
Aleksander Jaworski
Keyword(s):  
Solid State ◽  
Ir Spectroscopy ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Surface Coverage ◽  
Gas Mixtures ◽  
Mas Nmr ◽  
Significant Fraction ◽  
Zeolite A

Formation of CO<sub>3</sub><sup>2-</sup> and HCO<sub>3</sub><sup>-</sup> species without participation of the framework oxygen atoms upon chemisorption of CO<sub>2</sub> in zeolite |Na<sub>12</sub>|-A is revealed. The transfer of O and H atoms is very likely to have proceeded via the involvement of residual H<sub>2</sub>O or acid groups. A combined study by solid-state <sup>13</sup>C MAS NMR, quantum chemical calculations, and <i>in situ</i> IR spectroscopy showed that the chemisorption mainly occurred by the formation of HCO<sub>3</sub><sup>-</sup>. However, at a low surface coverage of physisorbed and acidic CO<sub>2</sub>, a significant fraction of the HCO<sub>3</sub><sup>-</sup> was deprotonated and transformed into CO<sub>3</sub><sup>2-</sup>. We expect that similar chemisorption of CO<sub>2</sub> would occur for low-silica zeolites and other basic silicates of interest for the capture of CO<sub>2</sub> from gas mixtures.

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