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Updated: May 22, 2026
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High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Published on: October 9, 2020
Combining dipolar-quadrupolar correlation spectroscopy with isotropic shift resolution in magic-angle-spinning 17O
1Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India.
Summary
This study introduces a 3D experiment to analyze quadrupolar nuclei interactions. It precisely measures key parameters and estimates bond distances, advancing solid-state NMR applications.
Area of Science:
- Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy.
- Quantum mechanics and spin dynamics.
- Materials characterization.
Background:
- Heteronuclear dipolar recoupling is crucial for understanding spin interactions in solids.
- Quadrupolar nuclei (spin > 1/2) present complex spectra due to electric quadrupole interactions.
- Accurate determination of various NMR parameters is essential for structural elucidation.
Purpose of the Study:
- To investigate the effect of heteronuclear dipolar recoupling on half-integer spin quadrupolar nuclei.
- To develop a 3D NMR experiment for simultaneous extraction of multiple NMR parameters.
- To estimate internuclear distances and tensor orientations in solid materials.
Main Methods:
- A novel three-dimensional (3D) NMR experiment was designed and implemented.
- The experiment utilizes heteronuclear dipolar recoupling techniques.
- Data analysis involved spectral simulations and comparison with experimental results.
Main Results:
- The 3D experiment successfully resolved different quadrupolar sites.
- Simultaneous extraction of quadrupolar coupling constants, electric field gradient asymmetry parameters, and isotropic shifts was achieved.
- Heteronuclear dipolar coupling constants and relative tensor orientations were estimated.
- The (1)H-(17)O bond distance in brucite, Mg((17)OH)(2), was accurately determined.
Conclusions:
- The developed 3D NMR experiment is highly effective for characterizing quadrupolar nuclei in solids.
- This method provides a comprehensive approach to extract crucial structural and dynamic information.
- The technique offers a pathway for precise internuclear distance measurements and orientation analysis in complex materials.
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