Abstract
The influence of the Coulomb attraction on photogenerated singlet radical ion pairs' separation and their geminate recombination to singlet and triplet neutral products is considered. Making use of the contact approximation and the rate or Hamiltonian description of the spin conversion, the quantum yields of recombination products and their diffusional dependence are investigated and fitted to the available experimental data. The nonmonotonous behavior of the triplet quantum yield of neutral products on both the Onsager radius and the triplet charge recombination rate constant are revealed and discussed in detail.
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