1. Mononuclear Fe(III) Schiff base antipyrine complexes for catalytic hydrogen generation.
- Author
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Cropley, Jessica D., Mitchell, Amanda C., Fritsch, Nicole A., Ho, Marissa, Wells, Timothy D., Reynolds, Todd M., Brennessel, William W., and McNamara, William R.
- Subjects
HYDROGEN evolution reactions ,ATOMIC hydrogen ,WATER sampling ,PHOTOCATALYSTS ,ANTIPYRINE ,LIGANDS (Chemistry) - Abstract
Mononuclear Fe(III) complexes containing an antipyrine Schiff base ligand were prepared and fully characterized, demonstrating a planar tetradentate coordination geometry. These complexes were found to be active for the hydrogen evolution reaction. Catalysis occurs at −1.4 V vs. Fc
+ /Fc, with an overpotential of 700 mV. The complexes are active electrocatalysts with a turnover frequency of 700 s−1 . Furthermore, when paired with a chromophore and sacrificial donor, the complexes are active photocatalysts demonstrating >1700 turnovers during 40 hours of irradiation with a quantum yield of up to 5.4%. The catalysts have also been found to operate in natural water samples of varying salinity. [ABSTRACT FROM AUTHOR]- Published
- 2024
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