Resonant Mixing Dynamic Nuclear Polarization
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nihms-2093802.pdf
Description
Accepted version
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1018.23 KB
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Checksum (MD5)
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Author(s)
Quan, Yifan
Ouyang, Yifu
Mardini, Michael
Palani, Ravi Shankar
Banks, Daniel
Kempf, James
Wenckebach, W Tom
Griffin, Robert G
Date Issued
July 31, 2023
Journal
The Journal of Physical Chemistry Letters
Publisher
American Chemical Society
Citation
Resonant Mixing Dynamic Nuclear Polarization. Yifan Quan, Yifu Ouyang, Michael Mardini, Ravi Shankar Palani, Daniel Banks, James Kempf, W. Tom Wenckebach, and Robert G. Griffin.The Journal of Physical Chemistry Letters 2023 14 (31), 7007-7013.
Version
Author's final manuscript
Abstract
We propose a mechanism for dynamic nuclear polarization that is different from the well-known Overhauser effect, solid effect, cross effect, and thermal mixing processes. We term it Resonant Mixing (RM), and we show that it arises from the evolution of the density matrix for a simple electron–nucleus coupled spin pair subject to weak microwave irradiation, the same interactions as the solid effect. However, the SE is optimal when the microwave field is off-resonance, whereas RM is optimal when the microwave field is on-resonance and involves the mixing of states by the microwave field together with the electron–nuclear coupling. Finally, we argue that this mechanism is responsible for the observed dispersive-shaped DNP field profile for trityl samples near the electron paramagnetic resonance center.
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DOI of Published Version
https://doi.org/10.1021/acs.jpclett.3c01869
