Activating a [FeFe] Hydrogenase Mimic for Hydrogen Evolution under Visible Light

Inspired by the active center of the natural [FeFe] hydrogenases, we designed a compact and precious metal‐free photosensitizer‐catalyst dyad (PS‐CAT) for photocatalytic hydrogen evolution under visible light irradiation. PS‐CAT represents a prototype dyad comprising π‐conjugated oligothiophenes as...

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Detalles Bibliográficos
Autores principales: Buday, Philipp, Kasahara, Chizuru, Hofmeister, Elisabeth, Kowalczyk, Daniel, Farh, Micheal K., Riediger, Saskia, Schulz, Martin, Wächtler, Maria, Furukawa, Shunsuke, Saito, Masaichi, Ziegenbalg, Dirk, Gräfe, Stefanie, Bäuerle, Peter, Kupfer, Stephan, Dietzek‐Ivanšić, Benjamin, Weigand, Wolfgang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9313588/
https://www.ncbi.nlm.nih.gov/pubmed/35178850
http://dx.doi.org/10.1002/anie.202202079
Descripción
Sumario:Inspired by the active center of the natural [FeFe] hydrogenases, we designed a compact and precious metal‐free photosensitizer‐catalyst dyad (PS‐CAT) for photocatalytic hydrogen evolution under visible light irradiation. PS‐CAT represents a prototype dyad comprising π‐conjugated oligothiophenes as light absorbers. PS‐CAT and its interaction with the sacrificial donor 1,3‐dimethyl‐2‐phenylbenzimidazoline were studied by steady‐state and time‐resolved spectroscopy coupled with electrochemical techniques and visible light‐driven photocatalytic investigations. Operando EPR spectroscopy revealed the formation of an active [Fe(I)Fe(0)] species—in accordance with theoretical calculations—presumably driving photocatalysis effectively (TON≈210).

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