Biradical spin dynamics with distance-dependent exchange interaction and electron transfer efficiency

Robert Bittl, Klaus Schulten

Research output: Contribution to journalArticlepeer-review

Abstract

The spin dynamics and reaction kinetics of photogenerated zwitterionic biradicals of the type 2A-(CH2)n2D+ (n = 8, 9, 10) are described for a model which assumes the same AD distance dependence for a "through space" exchange interaction and for the efficiency of electron back-transfer to the singlet ground state 1A(CH2)n1D and to a triplet excited state 3A*(CH2)n1D. The model is independent of the length n of the polymethylene chain and accounts well for the three type of observation on the biradicals: the mono-exponential character of the biradical decay, the life time associated with this decay, and the magnetic field dependence of the yield of the triplet excited state.

Original languageEnglish (US)
Pages (from-to)387-392
Number of pages6
JournalChemical Physics Letters
Volume173
Issue number4
DOIs
StatePublished - Oct 12 1990
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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