Excited states of mono- and biruthenium(II) complexes adsorbed on nanocrystalline titanium dioxide studied by electroabsorption spectroscopy.

ABSTRACT: Comprehensive characterization of the lowest energy electronic excited states for mono- and binuclear Ru(II) complexes containing bipyridine ligands has been performed by electroabsorption (EA) spectroscopy. The EA spectra of Ru complexes sensitizing a TiO₂ semiconductor were compared with the spectra of these complexes in the form of solid neat films, both of which parametrized within the Liptay theory. The extracted values of relevant parameters, relating to molecular dipoles after optical MLCT (metal-to-ligand-charge-transfer) excitation, exhibit a clearly noticeable increase for Ru complexes adsorbed on TiO₂, but they are too small to be attributed to excitation associated with the direct transfer of an electron from the dye adsorbate to the TiO₂ semico

SUBMITTER: Pelczarski D 

PROVIDER: S-EPMC11803096 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature