Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst. Issue 94 (7th November 2016)

• Record Type: Journal Article
• Authors: Yamamoto, Masanori; Nishizawa, Yusuke; Chábera, Pavel; Li, Fusheng; Pascher, Torbjörn; Sundström, Villy; Sun, Licheng; Imahori, Hiroshi
• Is Part Of: Chemical communications. Volume 52:Issue 94(2016)
• Page Start: 13702
• Page End: 13705
• Publication Date: 2016-11-07
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc07877j
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : A newly designed contracted porphyrin achieved efficient visible light absorption and interfacial electron transfer for water oxidation in artificial photosynthesis. 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.