Metalloligands L1 and L2 consisting of directional bis(terpyridine)ruthenium(II) units and bipyridine moieties were constructed by amide formation. From these metalloligands two Ru-Pt heterobimetallic complexes 1 and 2 were derived by a building-block method by means of platination with [PtCl 2 (dmso) 2 ]. Both bimetallic complexes 1 and 2 feature metal-to-ligand charge transfer (MLCT) absorptions, and emission occurs at room temperature in fluid solution from 3 MLCT(Ru) states in all cases. Energy transfer from platinum [a]