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Issue 94, 2016
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Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

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Abstract

A new subporphyrin was synthesized for use as a molecular sensitizer in electrochemical and dye-sensitized photoelectrochemical water oxidation. A photoelectrochemical cell with a TiO2 electrode modified with the sensitizer and a molecular water oxidation catalyst generated higher photocurrent than reference cells that have electrodes modified with either the photosensitizer or the catalyst under visible light (λ > 500 nm) illumination. Oxygen evolution was confirmed after photolysis by GC and GC-MS analyses using isotope-labeling experiments. The large molar extinction coefficients of the ring-contracted porphyrin in the visible region enabled kinetic analysis by time-resolved transient absorption spectroscopy, which also supported the photocatalytic activity.

Graphical abstract: Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

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Publication details

The article was received on 28 Sep 2016, accepted on 27 Oct 2016 and first published on 07 Nov 2016


Article type: Communication
DOI: 10.1039/C6CC07877J
Chem. Commun., 2016,52, 13702-13705

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    Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

    M. Yamamoto, Y. Nishizawa, P. Chábera, F. Li, T. Pascher, V. Sundström, L. Sun and H. Imahori, Chem. Commun., 2016, 52, 13702
    DOI: 10.1039/C6CC07877J

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