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Dissolution Dynamic Nuclear Polarization Instrumentation for Real-time Enzymatic Reaction Rate Measurements by NMR
Published on: February 23, 2016
Spin dynamics in experiments on orthodeuterium induced polarization (ODIP)
Vitaly P Kozinenko1, Alexey S Kiryutin1, Stephan Knecht2
1International Tomography Center, Siberian Branch of the Russian Academy of Science, Novosibirsk 630090, Russia.
The Journal of Chemical Physics
|September 23, 2020
Summary
Ortho-Deuterium Induced Polarization (ODIP) enhances Nuclear Magnetic Resonance (NMR) signals for deuterium (2H) nuclei. This method achieves over 1000x signal enhancement, expanding spin hyperpolarization applications.
Area of Science:
- Physical Chemistry
- Magnetic Resonance Spectroscopy
- Quantum Spin Dynamics
Background:
- Nuclear Magnetic Resonance (NMR) spectroscopy is crucial for probing molecular structure and dynamics.
- Enhancing NMR signals, particularly for deuterium (2H) nuclei, is vital for broader applications.
- Ortho-Deuterium Induced Polarization (ODIP) offers a pathway to significantly boost 2H NMR signals.
Purpose of the Study:
- To provide a comprehensive description of the spin dynamics involved in Ortho-Deuterium Induced Polarization (ODIP).
- To theoretically investigate ODIP spectra and their dependence on experimental parameters.
- To compare theoretical predictions with experimental results for various substrates.
Main Methods:
- Enrichment of the ortho-component of D2 gas at low temperatures (30 K).
- Attachment of orthodeuterium to substrate molecules using hydrogenation catalysts to break symmetry.
- Theoretical calculations of ODIP spectra and comparison with experimental data.
- Investigation of NMR techniques for converting anti-phase to in-phase ODIP patterns and for transferring polarization to heteronuclei (13C).
Main Results:
- Achieved high enrichment (92%) of the ortho-component of D2.
- Demonstrated good agreement between calculated and experimental ODIP spectra.
- Obtained signal enhancement factors exceeding 1000 for 2H nuclei in liquid-phase experiments.
- Successfully transferred ODIP to 13C spins.
Conclusions:
- ODIP is an effective method for significantly enhancing 2H NMR signals.
- Theoretical modeling accurately predicts ODIP spectral behavior.
- This technique expands the utility of spin hyperpolarization for 2H NMR applications in chemistry and materials science.
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