Localization Of The MLCT State Of Novel Ruthenium Polypyridine Complexes Via Resonance Raman Spectroscopy

Artificial photochemical molecular devices (PMDs) for the catalytic conversion of a substrate under the assistance of light have to consist of a light absorbing moiety and a reactive center. Suitable and intensively investigated compounds for this purpose are Ruthenium polypyridine complexes. Ruthenium complexes display a rich photochemistry making them useful model systems for artificial photosynthesis, dyes in dye sensitized solar cells or light driven catalysis like e.g. the photocatalytic production of hydrogen. The initial photochemistry of Ruthenium polypyridine complexes can be described by a light induced electron transfer from the central Ru(H)-cation to a coordinated ligand under formation of a short lived MLCT state.