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Published on: October 9, 2020
Nuclear magnetic resonance at millitesla fields using a zero-field spectrometer.
Michael C D Tayler1, Tobias F Sjolander2, Alexander Pines2
1Magnetic Resonance Research Center, Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK; Department of Physics, University of California, Berkeley, CA 94720, USA.
New nuclear magnetic resonance (NMR) techniques achieve chemical resolution at ultra-low magnetic fields. This enables spin-species selective NMR pulse sequences in the microtesla range.
Area of Science:
- Analytical Chemistry
- Physical Chemistry
- Spectroscopy
Background:
- Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful analytical technique.
- Traditional NMR requires high magnetic fields for optimal sensitivity and resolution.
- Exploring NMR at low and ultra-low magnetic fields presents unique challenges and opportunities.
Purpose of the Study:
- To develop novel analytical capabilities for NMR experiments.
- To achieve chemical resolution in signal detection at ultra-low magnetic fields (below 1μT).
- To implement conventional NMR pulse sequences with spin-species selectivity in the microtesla to millitesla range.
Main Methods:
- Utilizing spin-spin J couplings for chemical resolution in signal detection.
- Operating NMR experiments in the zero to ultra-low magnetic field region (<1μT).
- Employing magnetic fields between 100μT and 1mT to execute NMR pulse sequences.
Main Results:
- Demonstrated new analytical capabilities for NMR.
- Achieved chemical resolution in signal detection at ultra-low magnetic fields.
- Successfully implemented conventional NMR pulse sequences with spin-species selectivity in the 100μT to 1mT range.
Conclusions:
- The developed methods open new avenues for NMR applications in resource-limited settings.
- Ultra-low field NMR with chemical resolution is feasible.
- Spin-species selective pulse sequences can be effectively implemented at microtesla field strengths.
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