High-resolution aluminum-27 solid-state magic-angle sample-spinning nuclear magnetic resonance spectroscopic study of aluminum trichloride-tetrahydrofuran complexes

1990 ◽  
Vol 29 (19) ◽  
pp. 3666-3669 ◽  
Author(s):  
Oc Hee Han ◽  
Eric Oldfield
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Spectroscopic Study ◽  
Magic Angle ◽  
Magic Angle Sample Spinning ◽  
Aluminum Trichloride ◽  
Nuclear Magnetic

Investigation of mineral phases of bone by solid-state phosphorus-31 magic-angle sample-spinning nuclear magnetic resonance

Biochemistry ◽  
1984 ◽  
Vol 23 (25) ◽  
pp. 6115-6120 ◽  
Author(s):  
A. H. Roufosse ◽  
W. P. Aue ◽  
J. E. Roberts ◽  
M. J. Glimcher ◽  
R. G. Griffin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Magic Angle ◽  
Mineral Phases ◽  
Magic Angle Sample Spinning ◽  
Nuclear Magnetic

A carbon-13 nuclear magnetic resonance study of solid tetracyclines

1987 ◽  
Vol 65 (2) ◽  
pp. 357-362 ◽  
Author(s):  
Sandra Mooibroek ◽  
Roderick E. Wasylishen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Pulse Sequence ◽  
Chemical Shifts ◽  
Nuclear Magnetic Resonance Study ◽  
Magic Angle ◽  
X Ray Diffraction ◽  
Magic Angle Sample Spinning ◽  
Nuclear Magnetic

Magic angle sample spinning and proton/carbon-13 cross-polarization techniques have been used to obtain high resolution solid state 13C nuclear magnetic resonance spectra of several tetracycline antibiotics. Carbon-13 resonances in the solid state are assigned by measuring the extent of dipolar broadening due to neighbouring quadrupolar nuclei and by using a pulse sequence that suppresses non-quaternary carbon resonances. The observed 13C chemical shifts are discussed in light of the known solid state structures derived from X-ray diffraction, and are compared with those in solution. It is shown that the solid state nuclear magnetic reosnance technique is capable of clearly distinguishing between the neutral and zwitterionic forms of the tetracycline free bases.

MASS-NMR structural analysis of barium aluminofluorophosphate glasses with and without nitridation

1990 ◽  
Vol 5 (4) ◽  
pp. 835-840 ◽  
Author(s):  
Joseph P. Fletcher ◽  
Subhash H. Risbud ◽  
R. James Kirkpatrick
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Local Structure ◽  
Nearest Neighbors ◽  
Magic Angle ◽  
Magic Angle Sample Spinning ◽  
Nuclear Magnetic

The local structure of barium-aluminofluorophosphate (Ba–Al–P–O–F) glasses was investigated using high resolution magic-angle sample spinning nuclear magnetic resonance (MASS-NMR) spectroscopy. The 27Al spectra show three different aluminum environments [Al(4), Al(5), and Al(6)] in these glasses. Changes were observed due to the addition of fluorine and nitrogen. 31P results indicate only one type of phosphorus environment which shifts with fluorine additions. The 19F spectra suggest that fluorine has both Ba and Al as nearest neighbors.

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