American Chemical Society
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Iron Polypyridyl Complexes for Photocatalytic Hydrogen Generation

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journal contribution
posted on 2016-08-22, 17:54 authored by Carolyn L. Hartley, Ryan J. DiRisio, Megan E. Screen, Kathryn J. Mayer, William R. McNamara
A series of Fe­(III) complexes were recently reported that are stable and active electrocatalysts for reducing protons into hydrogen gas. Herein, we report the incorporation of these electrocatalysts into a photocatalytic system for hydrogen production. Hydrogen evolution is observed when these catalysts are paired with fluorescein (chromophore) and triethylamine (sacrificial electron source) in a 1:1 ethanol:water mixture. The photocatalytic system is highly active and stable, achieving TONs > 2100 (with respect to catalyst) after 24 h. Catalysis proceeds through a reductive quenching pathway with a quantum yield of over 3%.