Fast high-resolution 2D correlation spectroscopy in inhomogeneous fields via Hadamard intermolecular multiple quantum coherences technique

2011 ◽  
Vol 211 (2) ◽  
pp. 162-169 ◽  
Author(s):  
Congbo Cai ◽  
Fenglian Gao ◽  
Shuhui Cai ◽  
Yuqing Huang ◽  
Zhong Chen
Keyword(s):  
High Resolution ◽  
Correlation Spectroscopy ◽  
Multiple Quantum ◽  
Inhomogeneous Fields ◽  
Intermolecular Multiple Quantum Coherences ◽  
2D Correlation Spectroscopy

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.

Hadamard encoded 2D correlation spectroscopy in inhomogeneous fields

2013 ◽  
Vol 563 ◽  
pp. 102-106 ◽  
Author(s):  
Yushan Chen ◽  
Zhiyong Zhang ◽  
Guiping Shen ◽  
Shuhui Cai ◽  
Congbo Cai ◽  
...  
Keyword(s):  
Correlation Spectroscopy ◽  
Inhomogeneous Fields ◽  
2D Correlation Spectroscopy

Spatially encoded ultrafast high-resolution 2D homonuclear correlation spectroscopy in inhomogeneous fields

2013 ◽  
Vol 227 ◽  
pp. 39-45 ◽  
Author(s):  
Zhiyong Zhang ◽  
Hao Chen ◽  
Can Wu ◽  
Rui Wu ◽  
Shuhui Cai ◽  
...  
Keyword(s):  
High Resolution ◽  
Correlation Spectroscopy ◽  
Inhomogeneous Fields
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