Covalently coordinated molecular chromophore-catalyst dyad assemblies have been introduced as a viable approach to construct dye-sensitized water splitting cells. Although molecular ruthenium chromophores and catalysts have been the common building block in this field, their low stability and high cost remain challenging.<br/>Our group recently proposed a facile synthetic approach in which earth-abundant chromophore and catalytic units are connected through a cyanide bridging ligand. This approach allows a pyridyl-containing organic chromophore to connect to the catalytic cobalt sites via a pentacyanoferrate group, and thus, to form a Prussian blue extended framework. This strategy enhances the stability of organic chromophores when they are incorporated into the Prussian blue structure. The iron sites allow an electron transfer between the cobalt and chromophore units during the photocatalytic water oxidation process. Herein, I will present my recent efforts in incorporating a series of UV and visible light-absorbing organic chromophores to the Prussian blue structure and their photocatalytic water oxidation performances.

Visible light-driven oxygen evolution by Prussian blue-based chromophore-catalyst assemblies

ACS Spring 2022

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