1. Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, B7602AYL Mar de Plata ‐ Buenos Aires (Argentina), Fax: (+54)?223‐4753150;2. Institut für Physikalische Chemie und Elektrochemie, Leibniz Universit?t Hannover, Callinstra?e 3‐3, 30167 Hannover (Germany)
Abstract:
Reduction of alizarin molecules coupled to TiO2 nanoparticles occurs on UV irradiation in the presence of a sacrificial electron donor. Reduction is mediated by conduction‐band electrons and yields a 1,2,9,10‐tetrahydroxyanthracene species which remains coupled to the TiO2 nanoparticles (see figure). The process can be reversed by addition of an acceptor (i.e. oxygen).
