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

Magnus Falkenström, Olof Johansson, Leif Hammarström

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

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
Volume360
Issue number3
DOIs
Publication statusPublished - Feb 15 2007

Fingerprint

Ruthenium
polarization (charge separation)
Manganese
ruthenium
Electrons
Light
Oxidation
Photosynthesis
Water
manganese
Chromophores
Excited states
Genetic Recombination
recombination reactions
oxidation
water splitting
photosynthesis
chromophores
Catalysts
excitation

Keywords

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

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Light-induced charge separation in ruthenium based triads - New variations on an old theme. / Falkenström, Magnus; Johansson, Olof; Hammarström, Leif.

In: Inorganica Chimica Acta, Vol. 360, No. 3, 15.02.2007, p. 741-750.

Research output: Contribution to journalArticle

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