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6. Near-Infrared Light-Driven Hydrogen Evolution from Water Using a Polypyridyl Triruthenium Photosensitizer.

Author

Tsuji, Yutaro, Yamamoto, Keiya, Yamauchi, Kosei, and Sakai, Ken

Subjects
*PYRIDYL compounds, *HYDROGEN evolution reactions, *RUTHENIUM compound synthesis, *POLYPYRIDINES, *ION pairs, *PHOTOSENSITIZERS, *SOLAR spectra
Abstract

In order to realize artificial photosynthetic devices for splitting water to H2 and O2 (2 H2O+ hν→2 H2+O2), it is desirable to use a wider wavelength range of light that extends to a lower energy region of the solar spectrum. Here we report a triruthenium photosensitizer [Ru3(dmbpy)6(μ-HAT)]6+ (dmbpy=4,4′-dimethyl-2,2′-bipyridine, HAT=1,4,5,8,9,12-hexaazatriphenylene), which absorbs near-infrared light up to 800 nm based on its metal-to-ligand charge transfer (1MLCT) transition. Importantly, [Ru3(dmbpy)6(μ-HAT)]6+ is found to be the first example of a photosensitizer which can drive H2 evolution under the illumination of near-infrared light above 700 nm. The electrochemical and photochemical studies reveal that the reductive quenching within the ion-pair adducts of [Ru3(dmbpy)6(μ-HAT)]6+ and ascorbate anions affords a singly reduced form of [Ru3(dmbpy)6(μ-HAT)]6+, which is used as a reducing equivalent in the subsequent water reduction process. [ABSTRACT FROM AUTHOR]

Published
2018
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7. Design and Synthesis of Labystegines, Hybrid Iminosugars from LAB and Calystegine, as Inhibitors of Intestinal α-Glucosidases: Binding Conformation and Interaction for ntSI

Author

Kato, Atsushi, primary, Zhang, Zhao-Lan, additional, Wang, Hong-Yao, additional, Jia, Yue-Mei, additional, Yu, Chu-Yi, additional, Kinami, Kyoko, additional, Hirokami, Yuki, additional, Tsuji, Yutaro, additional, Adachi, Isao, additional, Nash, Robert J., additional, Fleet, George W. J., additional, Koseki, Jun, additional, Nakagome, Izumi, additional, and Hirono, Shuichi, additional

Published
2015
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