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

OLAYA, ASTRID J.; OMATSU, TERUMASA; HIDALGO-ACOSTA, JONNATHAN C.; RIVA, JULIETA S.; BASSETTO, VICTOR COSTA; GASILOVA, NATALIA; GIRAULT, HUBERT H.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

AMER CHEMICAL SOC

Año: 2019 vol. 141 p. 6765 - 6765

0002-7863

e report the in situ self-assembly of TTF, TTF ·+ , and BF 4 - or PF 6 - 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 O 2 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.