Supramolecular complexes that target and cleave DNA are provided. The supramolecular complexes include at least one metal-to-ligand charge transfer (MLCT) light absorbing unit, at least one Pt based DNA binding unit, and at least one bridging unit that serves to connect the components. The Pt-based DNA binding unit binds the complex to DNA, and the MLCT unit absorbs light, thereby sensitizing molecular oxygen to produce reactive oxygen species in close proximity to the complex and the bound DNA. The reactive oxygen species cleave the bound DNA.
