Zusammenfassung
The lowest excited states of [Ru(bpy)₃]²⁺ (bpy: 2,2’-bipyridine) exhibit a very strong involvement of metal 4d orbitals, while the metal character is extremely small in the states of [Rh(bpy)₃J³⁺. This contrasting behavior is clearly displayed in the emission and excitation spectra, when ligands are isotopically marked. It is demonstrated that these states, being of metal-to-ligand charge ...
Zusammenfassung
The lowest excited states of [Ru(bpy)₃]²⁺ (bpy: 2,2’-bipyridine) exhibit a very strong involvement of metal 4d orbitals, while the metal character is extremely small in the states of [Rh(bpy)₃J³⁺. This contrasting behavior is clearly displayed in the emission and excitation spectra, when ligands are isotopically marked. It is demonstrated that these states, being of metal-to-ligand charge transfer character (³MLCT) in Ru(II) compounds, are covalentely delocalized over the metal and the different ligands, while the ground and the lowest excited states of Rh(III) compounds being of ³ππ* character are centered on individual ligands.
Keywords: CRh(bpy-hs),(bpy-ds)3-,13+; CRu(bpy-
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