Double-quantum 19F–19F dipolar recoupling at ultra-fast magic angle spinning NMR: application to the assignment of 19F NMR spectra of inorganic fluorides

2009 ◽  
Vol 11 (44) ◽  
pp. 10391 ◽  
Author(s):  
Qiang Wang ◽  
Bingwen Hu ◽  
Franck Fayon ◽  
Julien Trébosc ◽  
Christophe Legein ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
19F Nmr ◽  
Double Quantum ◽  
Magic Angle ◽  
19F Nmr Spectra ◽  
Dipolar Recoupling ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning ◽  
Inorganic Fluorides

Fast-magic-angle-spinning 19F NMR of inorganic fluorides and fluoridated apatitic surfaces

1990 ◽  
Vol 88 (2) ◽  
pp. 267-276 ◽  
Author(s):  
Anthony T Kreinbrink ◽  
Charles D Sazavsky ◽  
Joseph W Pyrz ◽  
Dennis G.A Nelson ◽  
Robert S Honkonen
Keyword(s):  
Magic Angle Spinning ◽  
19F Nmr ◽  
Magic Angle ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning ◽  
Inorganic Fluorides

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

Through-space contributions to two-dimensional double-quantum J correlation NMR spectra of magic-angle-spinning solids

2005 ◽  
Vol 122 (19) ◽  
pp. 194313 ◽  
Author(s):  
Franck Fayon ◽  
Dominique Massiot ◽  
Malcolm H. Levitt ◽  
Jeremy J. Titman ◽  
Duncan H. Gregory ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Double Quantum ◽  
Magic Angle ◽  
Two Dimensional ◽  
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.

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