Light-induced charge separation in ruthenium based triads - New variations on an old theme

Magnus Falkenström, Olof Johansson, Leif Hammarström

Research output: Contribution to journalReview articlepeer-review

44 Citations (Scopus)


Success with artificial photosynthesis requires control of the photoinduced electron transfer reactions leading to charge-separated states. In this review, some new ideas to optimize such charge-separated states in ruthenium(II) polypyridyl based three-component systems with respect to: (1) long lifetimes and (2) ability to store sufficient energy for catalytic water splitting, are presented. To form long-lived charge-separated states, a manganese complex as electron donor and potential catalyst for water oxidation has been used. The recombination reaction is unusually slow because it occurs deep down in the Marcus normal region as a consequence of the large bond reorganization following the manganese oxidation. For the creation of high energy charge-separated states, a strategy using bichromophoric systems is presented. By consecutive excitations of the two chromophores, the formation of charge-separated states that lie higher in energy than either of the two excited states could in theory be achieved, the first results of which will be discussed in this review.

Original languageEnglish
Pages (from-to)741-750
Number of pages10
JournalInorganica Chimica Acta
Issue number3
Publication statusPublished - Feb 15 2007


  • Artificial photosynthesis
  • Electron transfer
  • Light induced charge separation
  • Manganese
  • Ruthenium

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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