Olaya, Astrid J.Omatsu, TerumasaHidalgo-Acosta, Jonnathan C.Riva, Julieta S.Bassetto, Victor CostaGasilova, NataliaGirault, Hubert H.2019-06-182019-06-182019-06-182019-04-0910.1021/jacs.9b02693https://infoscience.epfl.ch/handle/20.500.14299/158234WOS:000466053400043We 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 selfassemblies 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.text::journal::journal article::research article