PCET of Tyrosines in Photosystem II and Model Systems for Artificial Photosynthesis: The Role of a Redox-active Link Between Catalyst and Photosensitizer...

摘要

Water oxidation in Photosystem II is dependent on a particular amino acid residue, Tyrosine_Z. This is a redox intermediate in steady-state oxygen evolution and transfers electrons from the water splitting CaMn4 cluster to the central chlorophyll radical P680~+. This perspective discusses the functional principles of Tyrosine_Z as a proton-coupled redox active link, as well as mechanistic studies of synthetic model systems and implications for artificial photosynthesis.