Specifically, the rR modes are associated with the phenanthroline (1455, 1515, 1583, and 1633 cm -1 ) and phenazine unit (1488, 1565, 1596, and 1610 cm -1 ) of tpphz. Consistent with TD-DFT predictions and aforementioned ground state absorption properties, the MLCT phz states of prbim-RuPt and prbimRu show higher contributions upon shifting the excitation wavelength from 405 to 473 nm. This is reflected in an increase of the relative intensity between the phenazine and phenanthroline associated modes upon shifting the excitation wavelength from 405 to 473 nm, which agrees with findings for tbbpyRu and tbbpyRuPt. Thus, the rR data supports the hypothesis that the prbim ligand facilitates a unidirectional Ru-to-Pt electron transfer upon photoexcitation between 405 and 473 nm.