scholarly journals Procedures for Labeling the High-Resolution Axis of Two-Dimensional MQ-MAS NMR Spectra of Half-Integer Quadrupole Spins

2002 ◽  
Vol 21 (1-2) ◽  
pp. 21-43 ◽  
Author(s):  
Yannick Millot ◽  
Pascal P Man
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Mas Nmr ◽  
Two Dimensional ◽  
Half Integer

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.

scholarly journals Two-Dimensional High-Resolution NMR Spectra in Matched B0 and B1 Field Gradients

2002 ◽  
Vol 156 (1) ◽  
pp. 146-151 ◽  
Author(s):  
Henrike Heise ◽  
Dimitris Sakellariou ◽  
Carlos A. Meriles ◽  
Adam Moulé ◽  
Alexander Pines
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Two Dimensional ◽  
Field Gradients ◽  
High Resolution Nmr ◽  
B1 Field

Notizen: Geminal Coupling Constants 2.J(15N13C) in 2-Substituted Pyridines, Measured by Hahn-Echo Extended (HEED) Pulse Sequences

1993 ◽  
Vol 48 (10) ◽  
pp. 1433-1436
Author(s):  
Bernd Wrackmeyer ◽  
Gerald Kehr
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Pulse Sequences ◽  
Coupling Constants ◽  
Positive Sign ◽  
Two Dimensional ◽  
H Nmr ◽  
Substituted Pyridines ◽  
Geminal Coupling

Coupling constants 2J(15N13CR) and nJ(15N1HR) in 2-substituted pyridines [R = Me (1), CH=CH2 (2), C≡CH (3), C(O)H (4), C(O)Me (5)] have been measured by using Hahn-echo extended (HEED) pulse sequences for one- (1 D) and two-dimensional (2D) 13C/1H NMR (HEED-INEPT, HEED-HETCOR). The magnitude of |2J(15N13CR)| is hardly affected by the hybridization of 13CR. 15N NMR spectra, measured under conditions of ultra high resolution (UHR) confirm the values 2J(15N13CR). 2D 13C/1H HEED-HETCOR experiments show that the sign of 3J(15Ν1HR) is negative in 1, whereas the coupling constants 3J(15N1HR) in 4 and 4J(15N1HR) in 3 have a positive sign

Two-dimensional heteronuclear 1H ↔ 27Al-correlated MAS NMR spectra of layered silicates

2001 ◽  
pp. 249-250 ◽  
Author(s):  
María D. Alba ◽  
Ana I. Becerro ◽  
Miguel A. Castro ◽  
Ana C. Perdigón
Keyword(s):  
Nmr Spectra ◽  
Mas Nmr ◽  
Layered Silicates ◽  
Two Dimensional
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