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Visible light-driven water oxidation with a ruthenium sensitizer and a cobalt-based catalyst connected with a polymeric platform

Zeynep Kap, Ferdi Karadas
Faraday Discussions 2019 April 3
A facile synthesis for a photosensitizer-water oxidation catalyst (PS-WOC) dyad, which is connected through a polymeric platform, has been reported. The dyad assembly consists of a ruthenium-based chromophore and a cobalt-iron pentacyanoferrate coordination network as the water oxidation catalyst while poly(4-vinylpyridine) serves as the bridging group between two collaborating units. Photocatalytic experiments in the presence of an electron scavenger reveal that the dyad assembly maintains its activity for 6 h while the activity of a cobalt hexacyanoferrate and Ru(bpy)32+ couple decreases gradually and eventually decays after a 3 h catalytic experiment. Infrared and XPS studies performed on the post-catalytic powder sample confirm the stability of the dyad during the catalytic process.


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