Expanded bite angles in tridentate ligands. Improving the photophysical properties in bistridentate RuII polypyridine complexes

Leif Hammarström, Olof Johansson

Research output: Contribution to journalReview article

89 Citations (Scopus)


Bistridentate metal complexes as photosensitizers are ideal building blocks in the construction of rod-like isomer-free assemblies for intramolecular photoinduced charge separation. Approaches to obtain long-lived luminescent metal-to-ligand charge transfer excited states in bistridentate RuII polypyridine complexes via the manipulation of metal-centered state energies are discussed. Following an introduction to general strategies to prolong the excited state lifetimes, more recent work is explored in detail where tridentate ligands with expanded 2,2′:6′,2″-terpyridine cores are utilized. The synthesis of these tridentate ligands and their corresponding RuII complexes is covered. Bistridentate RuII complexes with microsecond metal-to-ligand charge transfer excited state lifetimes are described, and are used in electron donor-photosensitizer-electron acceptor assemblies for efficient vectorial photoinduced charge separation.

Original languageEnglish
Pages (from-to)2546-2559
Number of pages14
JournalCoordination Chemistry Reviews
Issue number21-22
Publication statusPublished - Nov 1 2010



  • Donor-acceptor
  • Luminescence
  • Photochemistry
  • Polypyridine ligands
  • Ruthenium
  • Tridentate ligands

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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