A Self-Assembled Organic/Metal Junction for Water Photo-Oxidation

We report the in situ self-assembly of TTF, TTF•+, and BF4 – or PF6 – into p-type semiconductors on the surface of Pt microparticles dispersed in water/acetonitrile mixtures. The visible light photoactivation of these self-assemblies leads to water oxidation forming O2 and H+, with an efficiency of...

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Published inJournal of the American Chemical Society Vol. 141; no. 16; pp. 6765 - 6774
Main Authors Olaya, Astrid J, Omatsu, Terumasa, Hidalgo-Acosta, Jonnathan C, Riva, Julieta S, Bassetto, Victor Costa, Gasilova, Natalia, Girault, Hubert H
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 24.04.2019
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Summary:We report the in situ self-assembly of TTF, TTF•+, and BF4 – or PF6 – into p-type semiconductors on the surface of Pt microparticles dispersed in water/acetonitrile mixtures. The visible light photoactivation of these self-assemblies leads to water oxidation forming O2 and H+, with an efficiency of 100% with respect to the initial concentration of TTF•+. TTF•+ is then completely reduced to TTF upon photoreduction with water. The Pt microparticles act as floating microelectrodes whose Fermi level is imposed by the different redox species in solution; here predominantly TTF, TTF•+, and HTTF+, which furthermore showed no signs of decomposition in solution.
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ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.9b02693