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Scientific article
Open access
English

Hot recombination of photogenerated ion pairs

Published inThe Journal of chemical physics, vol. 123, no. 24, p. 244510-244510
Publication date2005
Abstract

The recombination dynamics of ion pairs generated upon electron transfer quenching of perylene in the first singlet excited state by tetracyanoethylene in acetonitrile is quantitatively described by the extended unified theory of photoionization/recombination. The extension incorporates the hot recombination of the ion pair passing through the level-crossing point during its diffusive motion along the reaction coordinate down to the equilibrium state. The ultrafast hot recombination vastly reduces the yield of equilibrated ion pairs subjected to subsequent thermal charge recombination and separation into free ions. The relatively successful fit of the theory to the experimentally measured kinetics of ion accumulation/recombination and free ion yield represents a firm justification of hot recombination of about 90% of primary generated ion pairs.

Keywords
  • Organic compounds
  • Charge exchange
  • Photoionisation
  • Reaction kinetics theory
  • Energy level crossing
  • Molecule-photon collisions
  • Ion recombination
  • Chemical equilibrium
Research group
Citation (ISO format)
GLADKIKH, Vladislav et al. Hot recombination of photogenerated ion pairs. In: The Journal of chemical physics, 2005, vol. 123, n° 24, p. 244510–244510. doi: 10.1063/1.2140279
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Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0021-9606
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