Enhancement of quantum rotor NMR signals by frequency-selective pulses

2015 ◽  
Vol 250 ◽  
pp. 25-28 ◽  
Author(s):  
Soumya Singha Roy ◽  
Jean-Nicolas Dumez ◽  
Gabriele Stevanato ◽  
Benno Meier ◽  
Joseph T. Hill-Cousins ◽  
...  
Keyword(s):  
Selective Pulses ◽  
Frequency Selective ◽  
Nmr Signals

scholarly journals Frequency-selective Heteronuclear Correlation (FS-HETCOR) Experiments in Solid-State NMR

2021 ◽  
Author(s):  
Zhengfeng Zhang ◽  
Yongchao Su ◽  
Jun Yang
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Structural Information ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Heteronuclear Correlation ◽  
Selective Pulses ◽  
Frequency Selective ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Heteronuclear correlation (HETCOR) is critical to obtain structural information in solid-state nuclear magnetic resonance (NMR). We propose novel frequency-selective Heteronuclear correlation (FS-HETCOR) experiments to selectively enhance the inter-atomic correlations of interest. FS-HETCOR relies on heteronuclear selective phase-optimized recoupling (SPRx), which is frequency-selective in heteronuclear recouping without using selective pulses. Compared to regular HETCOR, FS-HETCOR selectively enhances the desired heteronuclear correlations by a factor of up to 5 and suppresses the unwanted ones to 10% as demonstrated in 1H-19F and 1H-13C experiments under fast magic-angle spinning (MAS). Moreover, FS-HETCOR can theoretically be applied at arbitrary MAS rates by utilizing various SPRx schemes. We believe that the method will enhance the ability of solid-state NMR to probe heteronuclear structural information.

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