Abstract
Abstract Photochemical decolorization reaction of terarylenes with a hydroxy or a methoxy group is studied on the surface of gold nanoparticles (AuNPs)/TiO2 thin hybrid film. AuNPs were deposited on TiO2 film after UV irradiation with HAuCl4. The colored form of terarylenes could not be decolorized at the bare AuNPs on TiO2 under irradiation of green light (530 nm in wavelength). On the other hand, effective decolorization activity of terarylene, having a hydroxy group, was observed at the surface of AuNPs/TiO2 hybrid film with an optimized number of Ti(O) insulator layers on AuNPs. The mechanism for the enhanced decoloration is proposed based on the difference in the substituent of the terarylenes.
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