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High-resolution NMR of quadrupolar nuclei using mixed multiple-quantum coherences
A Jerschow1, J W Logan, A Pines
1Materials Sciences Division, Lawrence Berkeley National Laboratory and Department of Chemistry, University of California at Berkeley, Berkeley, California 94720, USA.
Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|April 25, 2001
Summary
This study demonstrates a new multiple-quantum magic angle spinning (MQMAS) NMR experiment. It refines quadrupolar broadening for improved resolution in nuclear magnetic resonance spectroscopy.
Area of Science:
- Solid-state Nuclear Magnetic Resonance (NMR) Spectroscopy
- Quantum Coherence Phenomena
Background:
- Quadrupolar nuclei present significant challenges in NMR spectroscopy due to broadening effects.
- Existing multiple-quantum magic angle spinning (MQMAS) NMR techniques have limitations in resolution.
Purpose of the Study:
- To demonstrate a novel MQMAS NMR experiment for quadrupolar nuclei.
- To enhance spectral resolution by refocusing quadrupolar broadening.
Main Methods:
- Utilizing two distinct multiple quantum coherences within the t(1) evolution period.
- Applying magic angle spinning (MAS) to mitigate anisotropic interactions.
Main Results:
- Successfully demonstrated the proposed MQMAS NMR experiment.
- The experiment effectively refocuses quadrupolar broadening, leading to improved spectral clarity.
Conclusions:
- The developed MQMAS NMR experiment offers potential for superior resolution compared to current methods.
- This technique is promising for the detailed analysis of quadrupolar nuclei in solid-state NMR.