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Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

The synthesis and characterization of dinuclear ruthenium sensitizers and their applications in photocatalytic hydrogen production.


PMID 23353692

Abstract

A dinuclear ruthenium(II) dye sensitizer, ([Ru(2)(bpy)(4)BL](ClO(4))(2)) referred as Compound 1, where bpy=2,2'-bipyridine, BL=2,2'-((1E,1'E)-(((E)-diazene-1,2-diyl-bis(2,1-phenylene))-bis(azanylylidene))-bis (methanylylidene)) diphenol (a bidentate bridging ligand), was designed, synthesized and characterized. The dye sensitizer was used on the photocatalytic water splitting for hydrogen (H(2)) production over TiO(2) (P25) under visible light (λ≥400 nm) irradiation using triethanolamine (TEOA) as a sacrificial electron donor. The dye sensitized-TiO(2) demonstrated a good stability and sufficient reproducibility for over 6 h. The photosensitization ability of the sensitizer was due to its conjugation system, large molecular area, TiO(2) linkage mode and the antenna effect.