6533b82efe1ef96bd1292683
RESEARCH PRODUCT
Transient absorption studies of the Ru(dcbpy)2(NCS)2 excited state and the dye cation on nanocrystalline TiO2 film
Jouko Korppi-tommolaJani KallioinenViivi LehtovuoriPasi Myllyperkiösubject
Electron transferAbsorption spectroscopyNanocrystalChemistryExcited statePicosecondUltrafast laser spectroscopyKineticsGeneral Physics and AstronomyPhysical and Theoretical ChemistryPhotochemistryNanocrystalline materialdescription
We have measured dynamics of the Ru(dcbpy)2(NCS)2 [dcbpy = 4,4′-dicarboxy-2,2′-bipyridine] excited state and the dye cation on nanocrystalline TiO2 film in the wavelength region 700–900 nm. The dye in ethanol solution and Ru(dcbpy)2(NCS)2 sensitized nanocrystalline Al2O3 films were used as non-injecting reference samples for excited state identification. For TiO2/Ru(dcbpy)2(NCS)2 film the `reactant' decay and `product' formation kinetics observed at different probe wavelengths showed that the resolved transient absorption picosecond components (1.1±0.2), (12±2) and (100±5) ps are related to electron injection from the excited states of the dye to the semiconductor TiO2.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-06-01 | Chemical Physics Letters |