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Updated: Sep 5, 2025

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Selective Nuclear Magnetic Resonance Method for Enhancing Long-Range Heteronuclear Correlations in Solids
Zhengfeng Zhang1, Yongchao Su2,3,4, Hang Xiao1,5
1National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, P. R. China.
A new selective nuclear magnetic resonance (NMR) method, heteronuclear selective phase-optimized recoupling (hetSPR), enhances long-range correlations in solids. This technique improves structural elucidation for biomolecules, materials, and pharmaceuticals.
Area of Science:
- Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy.
- Materials science and structural biology.
- Pharmaceutical analysis.
Background:
- Long-range heteronuclear correlation is crucial for solid-state NMR.
- Current methods face challenges in selectively enhancing specific correlations.
- Structural elucidation of complex solids requires improved NMR techniques.
Purpose of the Study:
- To introduce a novel selective NMR method, heteronuclear selective phase-optimized recoupling (hetSPR).
- To enhance desired long-range heteronuclear correlations in solid samples.
- To overcome limitations of conventional methods in solid-state NMR.
Main Methods:
- Development and application of heteronuclear selective phase-optimized recoupling (hetSPR).
- Utilizing characteristic chemical shifts for selective correlation enhancement.
- Testing the method on a fluorinated pharmaceutical drug (bicalutamide) under fast magic-angle spinning.
Main Results:
- hetSPR selectively enhances target heteronuclear correlations (e.g., 1H-13C, 1H-19F) by factors up to 5.
- Unwanted correlations are significantly suppressed.
- Demonstrated a 2.4-fold enhancement of a long-range 1H-19F correlation (4.8 Å) in bicalutamide.
Conclusions:
- hetSPR is a user-friendly method that does not require selective pulses.
- The technique significantly improves the ability to study long-range heteronuclear correlations in solids.
- Expected to advance structural elucidation capabilities in solid-state NMR for diverse applications.
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