Anchoring group and auxiliary ligand effects on the binding of ruthenium complexes to nanocrystalline TiO2 photoelectrodes

Kristine Kilså, Elizabeth I. Mayo, Bruce S. Brunschwig, Harry B. Gray, Nathan S. Lewis, Jay R. Winkler

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112 Citations (Scopus)

Abstract

An investigation of five ruthenium complexes with the thermodynamics and kinetics of binding to nanocrystalline TiO2 was made. The ruthenium complexes were structurally different in the number of anchoring carboxy groups attached to coordinated bipyridyl ligands and in the number of auxillary ligands. All the available carboxyl groups were used by the complexes in the dry state with only one monocarboxy or dicarboxy ligand to bind to the surface. The structural difference between the complexes in the five dyes yielded similar maximum coverages ( >100nmol cm-2) on nanocrystalline TiO2 electrodes and exhibited different binding constants.

Original languageEnglish
Pages (from-to)15640-15651
Number of pages12
JournalJournal of Physical Chemistry B
Volume108
Issue number40
DOIs
Publication statusPublished - Oct 7 2004

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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