Low-power broadband homonuclear dipolar recoupling without decoupling: Double-quantum 13C NMR correlations at very fast magic-angle spinning

2012 ◽  
Vol 547 ◽  
pp. 103-109 ◽  
Author(s):  
Gholamhasan Teymoori ◽  
Bholanath Pahari ◽  
Baltzar Stevensson ◽  
Mattias Edén
Keyword(s):  
Low Power ◽  
13C Nmr ◽  
Magic Angle Spinning ◽  
Double Quantum ◽  
Magic Angle ◽  
Dipolar Recoupling ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Amplitude-modulated low-power decoupling sequences for fast magic-angle spinning NMR

2013 ◽  
Vol 583 ◽  
pp. 1-7 ◽  
Author(s):  
Vipin Agarwal ◽  
Tiit Tuherm ◽  
Andres Reinhold ◽  
Jaan Past ◽  
Ago Samoson ◽  
...  
Keyword(s):  
Low Power ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Power Decoupling ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

scholarly journals Low-power cross polarization in fast magic-angle spinning NMR experiments

2009 ◽  
Vol 468 (1-3) ◽  
pp. 100-105 ◽  
Author(s):  
Adam Lange ◽  
Ingo Scholz ◽  
Theofanis Manolikas ◽  
Matthias Ernst ◽  
Beat H. Meier
Keyword(s):  
Low Power ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Homonuclear dipolar recoupling under ultra-fast magic-angle spinning: Probing 19F−19F proximities by solid-state NMR

2010 ◽  
Vol 203 (1) ◽  
pp. 113-128 ◽  
Author(s):  
Qiang Wang ◽  
Bingwen Hu ◽  
Olivier Lafon ◽  
Julien Trébosc ◽  
Feng Deng ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Dipolar Recoupling ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Solid-state NMR meets electron diffraction: determination of crystalline polymorphs of small organic microcrystalline samples

2017 ◽  
Vol 73 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Tetsuo Oikawa ◽  
Manabu Okumura ◽  
Tsunehisa Kimura ◽  
Yusuke Nishiyama
Keyword(s):  
Solid State ◽  
Electron Diffraction ◽  
Electron Irradiation ◽  
Solid State Nmr ◽  
Magic Angle Spinning ◽  
Double Quantum ◽  
Magic Angle ◽  
Molecular Conformations ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

A combination of solid-state NMR (ssNMR) and electron diffraction (ED) has been used to determine the crystalline polymorphs in small-organic microcrystalline molecules. Although 13C cross-polarization magic angle spinning (CPMAS) is a widely used method for determining crystalline polymorphs, even in a mixture, it sometimes fails if the molecular conformations are similar. On the other hand, ED can, in principle, differentiate crystalline forms with different lattice parameters, even when they have very similar molecular conformations. However, its application is usually limited to inorganic molecules only. This is because the ED measurements of organic molecules are very challenging due to degradation of the sample by electron irradiation. We overcame these difficulties by the use of 1H double-quantum/single-quantum correlation experiments at very fast magic angle spinning, together with ED observations under mild electron irradiation. The experiments were demonstrated on L-histidine samples in L-histidine·HCl·H2O, orthorhombic L-histidine and monoclinic L-histidine.

scholarly journals Tailored low-power cross-polarization under fast magic-angle spinning

2010 ◽  
Vol 205 (2) ◽  
pp. 216-223 ◽  
Author(s):  
Jean-Philippe Demers ◽  
Vinesh Vijayan ◽  
Stefan Becker ◽  
Adam Lange
Keyword(s):  
Low Power ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning
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