PHOTOSENSITIZING ACTION OF EOSIN Y FOR VISIBLE LIGHT INDUCED HYDROGEN EVOLUTION FROM WATER

Abstract
Eosin Y was not photobleached with triethanolamine (TEOA) on visible light irradiation in the presence of methyl viologen (Mv2+), and worked as an effective sensitizer to reduce Mv2+ into MV with TEOA in aqueous ethanol. The resulting MV reduced water to hydrogen in the presence of colloidal platinum in the same solvent. The quantum yield for MV formation was measured to be ca. 0.3.