Silicon-29 and aluminum-27 high-resolution MAS-NMR spectra of phyllosilicates

1984 ◽  
Vol 106 (17) ◽  
pp. 4790-4793 ◽  
Author(s):  
J. Sanz ◽  
J. M. Serratosa
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Mas Nmr

Ultrafast high-resolution magic-angle-spinning NMR spectroscopy

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 3942-3946 ◽  
Author(s):  
Marion André ◽  
Martial Piotto ◽  
Stefano Caldarelli ◽  
Jean-Nicolas Dumez
Keyword(s):  
Nmr Spectroscopy ◽  
High Resolution ◽  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Mas Nmr ◽  
Magic Angle ◽  
Solid Samples ◽  
Semi Solid ◽  
Angle Spinning

The acquisition of ultrafast high-resolution magic-angle spinning (HR-MAS) NMR spectra of semi-solid samples is demonstrated.

ChemInform Abstract: HIGH-RESOLUTION CARBON-13 CP/MAS NMR SPECTRA OF SOLID CELLULOSE OLIGOMERS AND THE STRUCTURE OF CELLULOSE II

1983 ◽  
Vol 14 (31) ◽  
Author(s):  
R. L. DUDLEY ◽  
C. A. FYFE ◽  
P. J. STEPHENSON ◽  
Y. DESLANDES ◽  
G. K. HAMER ◽  
...  
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
Cellulose Ii ◽  
Cp Mas Nmr

Ultra-high resolution 29Si MAS NMR spectra of highly siliceous zeolites

Nature ◽  
1987 ◽  
Vol 326 (6110) ◽  
pp. 281-283 ◽  
Author(s):  
C. A. Fyfe ◽  
J. H. O'Brien ◽  
H. Strobl
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
29Si Mas Nmr

Combined experimental and computational NMR study of crystalline and amorphous zeolitic imidazolate frameworks

2015 ◽  
Vol 17 (38) ◽  
pp. 25191-25196 ◽  
Author(s):  
Emma F. Baxter ◽  
Thomas D. Bennett ◽  
Caroline Mellot-Draznieks ◽  
Christel Gervais ◽  
Frédéric Blanc ◽  
...  
Keyword(s):  
High Resolution ◽  
Dft Calculations ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
Zeolitic Imidazolate Frameworks ◽  
Nmr Study ◽  
Cp Mas Nmr

High resolution 13C and 15N CP MAS NMR spectra of ZIF-4, ZIF-8 and ZIF-zni are assigned on the basis of DFT calculations on the geometry-optimized structures.

Suspension NMR Spectroscopy of Phosphines and Carbonylnickel Complexes Immobilized on Silica

1995 ◽  
Vol 50 (11) ◽  
pp. 1723-1728 ◽  
Author(s):  
K. D. Behringer ◽  
J. Bliimel
Keyword(s):  
Nmr Spectroscopy ◽  
High Resolution ◽  
Nmr Spectra ◽  
Solvent Polarity ◽  
Mas Nmr ◽  
Solvent Viscosity ◽  
Alkyl Chains ◽  
High Resolution Nmr ◽  
Cp Mas Nmr ◽  
Nmr Signals

The 31P suspension NMR spectra o f silica-immobilized bifunctional phosphines and their di- and tricarbonylnickel complexes were recorded using conventional high resolution NMR equipment. The practical advantages of suspension NMR spectroscopy, as compared to 31P CP/MAS NMR spectroscopy, are discussed. General tendencies are demonstrated: The suspension NMR signals become broader with increasing solvent viscosity and decreasing solvent polarity. Phenyl groups as spacers lead to broader resonances than alkyl chains. The linewidths increase in the case of chelation.

23Na 2D 3QMAS NMR and 29Si, 27Al MAS NMR investigation of Laponite and synthetic saponites of variable interlayer charge

Clay Minerals ◽  
2003 ◽  
Vol 38 (1) ◽  
pp. 63-69 ◽  
Author(s):  
L. Delevoye ◽  
J . -L. Robert ◽  
J . Grandjean
Keyword(s):  
High Resolution ◽  
Chemical Shift ◽  
Chemical Analysis ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
High Resolution Spectrum ◽  
Isotropic Chemical Shift ◽  
Quadrupolar Interaction ◽  
27Al Mas Nmr ◽  
Good Agreement

Abstract29Si, 27Al MAS NMR is used to characterize Laponite RD and synthetic saponites of variable interlayer charge. The Si/Al ratios are in good agreement with the calculated charge from chemical analysis except for the lowest-charged saponite. In contrast to the 29Si MAS NMR spectra in which resolved signals are detected, the 27Al MAS NMR spectra show one signal whose linewidth increases with the clay charge. The water content of the clay samples was obtained from 1H MAS NMR.The 2D MQMAS NMR technique is required to obtain a high-resolution spectrum of nuclei with strong quadrupolar interaction. This method was applied to the 23Na nucleus of clay counterions and to the 27Al structural nucleus. One well-defined 23Na NMR signal is observed for all the clays studied except the highest-charged saponite. Possible explanations for this different behaviour are discussed. The calculated isotropic chemical shift evolves progressively with the clay charge whereas the deduced quadrupolar interaction does not change significantly. The 27Al 2D 3QMAS technique was not able to resolve more than one signal.

High-resolution 1H MAS NMR spectra of 2∶1 phyllosilicates

2000 ◽  
pp. 37-38 ◽  
Author(s):  
María D. Alba ◽  
Ana I. Becerro ◽  
Miguel A. Castro ◽  
Ana C. Perdigón
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
1H Mas Nmr
Sign in / Sign up

Export Citation Format

Share Document