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

7 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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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

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