Ground state absorption. The UVvis absorption spectra of prbimRuPt and prbimRu resemble the spectra of the related complexes tbbpyRuPt and tbbpyRu and feature two major regions: (i) intense and structured absorption features between 250 and 390 nm, and (ii) a weaker broad absorption band ranging from 390 to 550 nm (see Figure ). The individual contributions of the ligands to the absorption spectrum can be unambiguously assigned by TD-DFT results (see Figure and and and) and by comparing the spectra of the metal complexes with those of the pure ligand. Note that a more detailed discussion of the photophysical properties of prbimRu can be found in the Supporting Information in Section 7.2.