Enhanced intersystem crossing in three-spin systems: A perturbation theory treatment

Sina Yeganeh*, Michael R. Wasielewski, Mark A. Ratner

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

We present a simple model for analyzing the spin dynamics of a three-spin system representing a photoexcited chromophore coupled to a stable radical species. Perturbation theory yields a Fermi's Golden Rule-type rate expression that describes the formation of a local triplet on the chromophore through spin exchange with the radical. The error introduced by perturbation theory is evaluated for a number of parameters. Finally, we explore the effect of different energetic and coupling parameters on the rate of triplet formation and suggest how this model can be used to tune the enhanced intersystem crossing in three-spin systems.

Original languageEnglish (US)
Pages (from-to)2268-2273
Number of pages6
JournalJournal of the American Chemical Society
Volume131
Issue number6
DOIs
StatePublished - Feb 18 2009

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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