Ruthenium Photocatalysts Capable of Reversibly Storing up to Four Electrons in a Single Acceptor Ligand: A Step Closer to Artificial Photosynthesis

Reversible storage of up to two or four electrons is possible in complexes P and Q, respectively, upon irradiation with visible light in the presence of triethylamine. This ability could lead to photocatalysts capable of concerted multielectron reduction of important substrates.