Unsensitized photochemical hydrogen production catalyzed by diiron hydrides

Wenguang Wang; Thomas B. Rauchfuss; Luca Bertini; Giuseppe Zampella

doi:10.1021/ja211778j

Unsensitized photochemical hydrogen production catalyzed by diiron hydrides

Wenguang Wang, Thomas B. Rauchfuss, Luca Bertini, Giuseppe Zampella

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The diiron hydride [(μ-H)Fe ₂(pdt)(CO) ₄(dppv)] ⁺ ([H2] ⁺, dppv = cis-1,2-C ₂H ₂(PPh ₂) ₂) is shown to be an effective photocatalyst for the H ₂ evolution reaction (HER). These experiments establish the role of hydrides in photocatalysis by biomimetic diiron complexes. Trends in redox potentials suggests that other unsymmetrically substituted diiron hydrides are promising catalysts. Unlike previous catalysts for photo-HER, [H2] ⁺ functions without sensitizers: irradiation of [H2] ⁺ in the presence of triflic acid (HOTf) efficiently affords H ₂. Instead of sacrificial electron donors, ferrocenes can be used as recyclable electron donors for the photocatalyzed HER, resulting in 4 turnovers.

Original language	English (US)
Pages (from-to)	4525-4528
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	134
Issue number	10
DOIs	https://doi.org/10.1021/ja211778j
State	Published - Mar 14 2012

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja211778j

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title = "Unsensitized photochemical hydrogen production catalyzed by diiron hydrides",

abstract = "The diiron hydride [(μ-H)Fe 2(pdt)(CO) 4(dppv)] + ([H2] +, dppv = cis-1,2-C 2H 2(PPh 2) 2) is shown to be an effective photocatalyst for the H 2 evolution reaction (HER). These experiments establish the role of hydrides in photocatalysis by biomimetic diiron complexes. Trends in redox potentials suggests that other unsymmetrically substituted diiron hydrides are promising catalysts. Unlike previous catalysts for photo-HER, [H2] + functions without sensitizers: irradiation of [H2] + in the presence of triflic acid (HOTf) efficiently affords H 2. Instead of sacrificial electron donors, ferrocenes can be used as recyclable electron donors for the photocatalyzed HER, resulting in 4 turnovers.",

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AU - Wang, Wenguang

AU - Rauchfuss, Thomas B.

AU - Bertini, Luca

AU - Zampella, Giuseppe

PY - 2012/3/14

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N2 - The diiron hydride [(μ-H)Fe 2(pdt)(CO) 4(dppv)] + ([H2] +, dppv = cis-1,2-C 2H 2(PPh 2) 2) is shown to be an effective photocatalyst for the H 2 evolution reaction (HER). These experiments establish the role of hydrides in photocatalysis by biomimetic diiron complexes. Trends in redox potentials suggests that other unsymmetrically substituted diiron hydrides are promising catalysts. Unlike previous catalysts for photo-HER, [H2] + functions without sensitizers: irradiation of [H2] + in the presence of triflic acid (HOTf) efficiently affords H 2. Instead of sacrificial electron donors, ferrocenes can be used as recyclable electron donors for the photocatalyzed HER, resulting in 4 turnovers.

AB - The diiron hydride [(μ-H)Fe 2(pdt)(CO) 4(dppv)] + ([H2] +, dppv = cis-1,2-C 2H 2(PPh 2) 2) is shown to be an effective photocatalyst for the H 2 evolution reaction (HER). These experiments establish the role of hydrides in photocatalysis by biomimetic diiron complexes. Trends in redox potentials suggests that other unsymmetrically substituted diiron hydrides are promising catalysts. Unlike previous catalysts for photo-HER, [H2] + functions without sensitizers: irradiation of [H2] + in the presence of triflic acid (HOTf) efficiently affords H 2. Instead of sacrificial electron donors, ferrocenes can be used as recyclable electron donors for the photocatalyzed HER, resulting in 4 turnovers.

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Unsensitized photochemical hydrogen production catalyzed by diiron hydrides

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