As our global population grows, our need for innovative energy sources also grows. One new energy source can be found through the use of artificial photosynthesis to produce hydrogen gas. In our lab, we have shown the effectiveness of nickel complexes with thiosalen ligands acting as a catalyst for the artificial photosynthetic process. Three derivatives of these nickel complexes have been made [Ni(tsalen)], [Ni(tsalphen)], and [Ni(tsaltol)]. (tsalen=N,N’-ethylenebis(thiosalicylideneimine); tsalphen=N,N'-phenylene-bis(thiosalicylideneimine); tsaltol=4-methyl-1,2-phenylene-bis(thiosalicylideneimine)). Hydrogen production has been measured electro- and photo-catalytically. Production reduction occurred electrocatalytically at ~-2.0 V vs Fc+/Fc. Hydrogen production was measured in light driven systems with [Ru(bpy)3]2+ and ascorbic acid to yield turnover numbers as high as 270. To reduce the overpotential of these catalysts, fluoro substituents were placed on the phenyl rings of the ligand were investigated for their catalytic activity.

Light-driven hydrogen production using nickel complexes with substituted thiosalen ligands

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.