ZAMBRANA GARCÍA, JOSÉ LUIS, Ferloni, Elena X. , Colis, Julie C. , Gafney, Harry D.
No
Inorg. Chem.
Article
Científica
1
1
4.147
2.097
07/01/2008
2,5202E+11
Ruthenium diimines are unique in their emissivity. Optical excitation with light of less than 500 nm leads to a strong emission in the 600-700 nm range. All emissive ruthenium complexes appear to undergo intersystem crossing from the absorptive singlet metal-to-ligand charge-transfer (MLCT) state to an emissive triplet MLCT state localized on the lowest-energy metal-ligand pair. In contrast to this currently accepted model, in which a single emissive state is populated and then equilibrates among other states based on a particular set of conditions, the excitation-wavelength dependence of the ((bPY)(2)RudppH](3 divided by) emission suggests two emissive pathways. One populates an emissive MLCT state localized on a bpy-Ru pair, and the other populates a lower-energy MLCT state localized on the dpp-Ru pair.