Principles of Multidimensional NMR Techniques for Measurement of J Coupling Constants

1991 ◽  
pp. 51-56
Author(s):  
Ole W. Sørensen
Keyword(s):  
Coupling Constants ◽  
Multidimensional Nmr ◽  
J Coupling ◽  
Nmr Techniques ◽  
J Coupling Constants

Conformational dynamics detected by nuclear magnetic resonance NOE values and J coupling constants

1988 ◽  
Vol 110 (11) ◽  
pp. 3393-3396 ◽  
Author(s):  
Horst. Kessler ◽  
Christian. Griesinger ◽  
Joerg. Lautz ◽  
Arndt. Mueller ◽  
Wilfred F. Van Gunsteren ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Conformational Dynamics ◽  
Coupling Constants ◽  
J Coupling ◽  
J Coupling Constants ◽  
Nuclear Magnetic

High-Resolution J-Scaling Nuclear Magnetic Resonance Spectra in Inhomogeneous Fields via Intermolecular Multiple-Quantum Coherences

2009 ◽  
Vol 63 (5) ◽  
pp. 585-590 ◽  
Author(s):  
Yanqin Lin ◽  
Zhong Chen ◽  
Shuhui Cai ◽  
Jianhui Zhong
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Chemical Shifts ◽  
Spin Systems ◽  
Coupling Constants ◽  
Multiple Quantum ◽  
J Coupling ◽  
Inhomogeneous Fields ◽  
J Coupling Constants

High-resolution nuclear magnetic resonance (NMR) spectroscopy with information on chemical shifts and J-coupling constants is a sensitive tool for studying physical, chemical, and biological properties of materials at the molecular level. In this paper, a pulse sequence is developed for acquiring high-resolution NMR spectra of liquid samples with J-scaling in inhomogeneous fields via two-dimensional intermolecular multiple-quantum coherence acquisitions. In the resulting one-dimensional projection spectra, apparent J-coupling constants were obtained with a scaling factor theoretically varying from zero (completely decoupled) to infinity relative to the original J-coupling constants while retaining information on chemical shifts, relative peak areas, and multiplet patterns. This allows either an accurate measurement of small J-coupling constants of weakly coupled spin systems or less crowded spectra for spin systems with J-splitting. Experimental observations and simulation results agree with theoretical analysis.

Evaluation of J Coupling Constants from Peak Amplitudes of Total Correlation Spectra

1993 ◽  
Vol 102 (1) ◽  
pp. 49-57 ◽  
Author(s):  
F. Fogolari ◽  
G. Esposito ◽  
S. Cauci ◽  
P. Viglino
Keyword(s):  
Coupling Constants ◽  
Total Correlation ◽  
J Coupling ◽  
J Coupling Constants
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