Figure 1.
A typical Jablonski diagram that depicts the electronic transitions responsible for light-mediated ligand loss observed in many Ru(2,2′-bipyridine)2(L)2 compounds. An electron is excited from the ground state (1GS) on the metal center into a metal-to-ligand charge transfer state (1MLCT). It undergoes rapid intersystem crossing into a triplet MLCT state, from which it can populate the thermally accessible triplet metal-centered state, 3MC, responsible for ligand exchange.
