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Magnetic field effect on recombination of radicals diffusing on a two-dimensional plane
Nikita N Lukzen1, Konstantin L Ivanov1, Vladimir M Sadovsky2
1International Tomography Center, Siberian Branch, Russian Academy of Sciences, Institutskaya Str. 3a, Novosibirsk 630090, Russia.
The Journal of Chemical Physics
|January 24, 2020
Summary
This study explores magnetic field effects on radical pair recombination. Theoretical models predict strong effects due to spin mixing, crucial for understanding magnetosensitive processes like lipid peroxidation.
Area of Science:
- Chemical Kinetics
- Physical Chemistry
- Biophysics
Background:
- Radical recombination is fundamental to chemical reactions.
- Magnetic Field Effects (MFEs) influence radical pair (RP) spin dynamics.
- Understanding MFEs is key for processes like lipid peroxidation.
Purpose of the Study:
- To theoretically investigate MFEs on radical recombination on an infinite plane.
- To analyze spin-selective diffusion-controlled recombination of RPs.
- To elucidate the role of Δg and hyperfine interactions in singlet-triplet mixing.
Main Methods:
- Theoretical modeling of radical pair recombination kinetics.
- Analysis of spin-selective diffusion-controlled reactions.
- Inclusion of spin relaxation and dipole-dipole interactions.
Main Results:
- Predicted strong MFEs on the time-dependent rate coefficient K(t).
- Singlet-triplet mixing driven by Δg and hyperfine interactions is the primary cause.
- Dipole-dipole interaction significantly impacts MFEs in 2D, as it's not averaged by diffusion.
Conclusions:
- MFEs on radical recombination are significant and influenced by spin dynamics.
- The findings are vital for interpreting MFEs in biological systems, such as lipid peroxidation on cell membranes.
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