New tricks for an old dog: Visible light-driven hydrogen production from water catalyzed by fac- and mer- geometrical isomers of tris(thiosemicarbazide) cobalt(III)

A pair of water-soluble octahedral complexes of cobalt(III) thiosemicarbazide with geometric isomers show efficient activity of photocatalyzing H2 production. This is the first example of investigating the effect on catalyzing H2 production using geometric isomers.