Preparation,characterization and electrochemistry of an iron-only hydrogenase active site model covalently linked to a ruthenium tris(bipyridine) photosensitizer

An NH₂-functionlized [Fe₂S₂] model complex of the iron-only hydrogenase active site was covalently linked to the tris(bipyridine)ruthenium photosensitizer. The [RuFeFe] trinuclear complex 1 was characterized by MS, IR, UV-vis, ¹H & ¹³C NMR spectra. A quasi-reversible reduction peak at ?1.41 V versus Ag/Ag⁺ for the Fe^IFe^I/Fe^IFe⁰ process is observed in the cyclic voltammogram of 1.