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Updated: Feb 10, 2026
04:37
High-Pressure NMR Experiments for Detecting Protein Low-Lying Conformational States
Published on: June 29, 2021
3.2K
NMR at pressures up to 90 GPa
Thomas Meier1, Saiana Khandarkhaeva1, Sylvain Petitgirard1
1Bayerisches Geoinstitut, Bayreuth University, Universitätsstraße 30, 95447 Bayreuth, Germany.
Summary
High-pressure Nuclear Magnetic Resonance (NMR) experiments now reach nearly 100 GPa using a new Diamond Anvil Cell (DAC) design. This advancement significantly enhances sensitivity for studying materials under extreme conditions.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Analytical Chemistry
Background:
- High-pressure Nuclear Magnetic Resonance (NMR) experiments have seen significant advancements in sensitivity and pressure range over the last 15 years.
- Developments in NMR spectroscopy applied to the diamond anvil cell (DAC) have been crucial.
- Recent work utilized Lenz lenses in toroidal diamond indenter cells, achieving 72 GPa and sensitivities of 10^12 spin/Hz^1/2.
Purpose of the Study:
- To implement a refined NMR resonator structure within a standard DAC.
- To enhance spin sensitivities and accessible pressure ranges for high-pressure NMR.
- To enable the study of small sample volumes (100 fL) under extreme pressures.
Main Methods:
- Developed a new NMR resonator using a pair of double-stage Lenz lenses.
- Integrated the resonator with a Helmholtz coil within a standard DAC.
- Tested the setup for high-pressure measurements on small sample volumes.
Main Results:
- Achieved pressures close to 100 GPa repeatedly.
- Enhanced spin sensitivities to approximately 5 x 10^11 spin/Hz^1/2.
- Demonstrated the capability to measure sample volumes as small as 100 fL prior to compression.
Conclusions:
- The new NMR-DAC design offers improved performance for high-pressure research.
- The straightforward manufacturing and handling facilitate broader applications.
- This technology holds promise for advancements in physics, chemistry, and biochemistry.
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