Efficient photocatalytic proton-coupled electron-transfer reduction of O2 using a saddle-distorted porphyrin as a photocatalyst

Emi Aoki; Wataru Suzuki; Hiroaki Kotani; Tomoya Ishizuka; Hayato Sakai; Taku Hasobe; Takahiko Kojima

doi:10.1039/c9cc01547g

Efficient photocatalytic proton-coupled electron-transfer reduction of O₂ using a saddle-distorted porphyrin as a photocatalyst

Emi Aoki, Wataru Suzuki, Hiroaki Kotani, Tomoya Ishizuka, Hayato Sakai, Taku Hasobe, Takahiko Kojima

Department of Chemistry

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

9 Citations (Scopus)

Abstract

Photocatalytic O₂ reduction reactions proceeded to produce H₂O₂ using a diprotonated saddle-distorted dodecaphenylporphyrin as a photocatalyst. The quantum yield (12%), the turnover number (3000 for 6 h), and the turnover frequency (500 h^-1) are achieved in photocatalytic systems based on free-base porphyrins for the first time. The photocatalytic reaction mechanism has been revealed by ns-laser flash photolysis and kinetic analysis.

Original language	English
Pages (from-to)	4925-4928
Number of pages	4
Journal	Chemical Communications
Volume	55
Issue number	34
DOIs	https://doi.org/10.1039/c9cc01547g
Publication status	Published - 2019

ASJC Scopus subject areas

Catalysis
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1039/c9cc01547g

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Efficient photocatalytic proton-coupled electron-transfer reduction of O₂ using a saddle-distorted porphyrin as a photocatalyst. / Aoki, Emi; Suzuki, Wataru; Kotani, Hiroaki; Ishizuka, Tomoya; Sakai, Hayato ; Hasobe, Taku; Kojima, Takahiko.

In: Chemical Communications, Vol. 55, No. 34, 2019, p. 4925-4928.

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

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abstract = "Photocatalytic O2 reduction reactions proceeded to produce H2O2 using a diprotonated saddle-distorted dodecaphenylporphyrin as a photocatalyst. The quantum yield (12%), the turnover number (3000 for 6 h), and the turnover frequency (500 h-1) are achieved in photocatalytic systems based on free-base porphyrins for the first time. The photocatalytic reaction mechanism has been revealed by ns-laser flash photolysis and kinetic analysis.",

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AU - Ishizuka, Tomoya

AU - Sakai, Hayato

AU - Hasobe, Taku

AU - Kojima, Takahiko

N1 - Funding Information: This work was supported by a Grant-in-Aid (17H03027) from the Japan Society of Promotion of Science (JSPS, MEXT). Financial support through CREST (JST) is also appreciated (JPMJCR16P1). W. S. appreciates the support from the JSPS Research Fellowship for Young Scientists (18J12184). Publisher Copyright: © The Royal Society of Chemistry 2019.

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AB - Photocatalytic O2 reduction reactions proceeded to produce H2O2 using a diprotonated saddle-distorted dodecaphenylporphyrin as a photocatalyst. The quantum yield (12%), the turnover number (3000 for 6 h), and the turnover frequency (500 h-1) are achieved in photocatalytic systems based on free-base porphyrins for the first time. The photocatalytic reaction mechanism has been revealed by ns-laser flash photolysis and kinetic analysis.

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Efficient photocatalytic proton-coupled electron-transfer reduction of O₂ using a saddle-distorted porphyrin as a photocatalyst

Abstract

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