Abstract: Supramolecular complexes, methods and systems for photocatalysis of the reduction of substrates are described. The supramolecular complexes of the invention have a light absorbing metal center, an electron collector ligand and a catalytically active metal. When the supramolecular complexes are exposed to radiant energy, the light absorbing metal center creates a charge that is transferred to the electron collector ligand to form a charge transfer state. The charge is then transferred through the catalytically active metal to a substrate, cause the reduction of the substrate, e.g. the reduction of water to molecular hydrogen.

Abstract: 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.

Abstract: Supramolecular complexes designed to produce hydrogen from water are provided. The supramolecular complexes absorb visible light and undergo charge transfer, leading to the collection of electrons at a reactive metal center, where the electrons reduce water to hydrogen. The complex remains intact during electron collection and hydrogen production.

Abstract: Supramolecular complexes, methods and systems for photocatalysis of the reduction of substrates are described. The supramolecular complexes of the invention have a light absorbing metal center, an electron collector ligand and a catalytically active metal. When the supramolecular complexes are exposed to radiant energy, the light absorbing metal center creates a charge that is transferred to the electron collector ligand to form a charge transfer state. The charge is then transferred through the catalytically active metal to a substrate, cause the reduction of the substrate, e.g. the reduction of water to molecular hydrogen.

Abstract: 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.

Abstract: Supramolecular complexes designed to produce hydrogen from water are provided. The supramolecular complexes absorb visible light and undergo charge transfer, leading to the collection of electrons at a reactive metal center, where the electrons reduce water to hydrogen. The complex remains intact during electron collection and hydrogen production.