Magnetic field effect on recombination of radicals diffusing on a two-dimensional plane

Nikita N. Lukzen, Konstantin L. Ivanov, Vladimir M. Sadovsky, Renad Z. Sagdeev

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Magnetic Field Effects (MFEs) on the recombination of radicals, which diffuse on an infinite plane, are studied theoretically. The case of spin-selective diffusion-controlled recombination of Radical Pairs (RPs) starting from a random spin state is considered assuming uniform initial distribution of the radicals. In this situation, reaction kinetics is described by a time-dependent rate coefficient K(t), which tends to zero at long times. Strong MFEs on K(t) are predicted that originate from the Δg and hyperfine driven singlet-triplet mixing in the RP. The effects of spin relaxation on the magnetic field are studied, as well as the influence of the dipole-dipole interaction between the electron spins of the RP. In the two-dimensional case, this interaction is not averaged out by diffusion and it strongly affects the MFE. The results of this work are of importance for interpreting MFEs on lipid peroxidation, a magnetosensitive process occurring on two-dimensional surfaces of cell membranes.

Original languageEnglish
Article number034103
Number of pages10
JournalJournal of Chemical Physics
Volume152
Issue number3
DOIs
Publication statusPublished - 21 Jan 2020

Keywords

  • INTEGRAL ENCOUNTER THEORY
  • SPIN-SELECTIVE RECOMBINATION
  • DISSOCIATION REACTION STAGES
  • SINGLET-TRIPLET TRANSITIONS
  • MULTISTAGE REACTIONS
  • NONSTATIONARY KINETICS
  • HOMOGENEOUS SOLUTIONS
  • LATERAL DIFFUSION
  • ACCOUNT
  • PAIR

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