Synthesis Of An Oxo-Bridged Diruthenium Diazene Complex And Its Catalytic Light-Driven Water Oxidation

Reactions of cis-[Ru(bpy)(2)Cl-2]center dot 2H(2)O, AgNO3, and 1,2-dimethylhydrazine in the presence of NaClO4 afforded a cationic oxo-bridged ruthenium(II) diazene complex [(bpy)(2)Ru(mu-O)(mu-eta(1),eta(1)-N,N-MeN=NMe)Ru(bpy)(2)](ClO4)(2) (1), which was characterized by NMR, IR, UV/Vis spectroscopies as well as single-crystal X-ray crystallography. The catalytic behavior of complex 1 towards light-driven water oxidation in a three-component system containing a photosensitizer [Ru(bpy)(3)]Cl-2 and an electron acceptor Na2S2O8 was investigated. (C) 2021 Elsevier Ltd. All rights reserved.