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Integrated Systems for Water Cleavage by Visible Light; Sensitization of TiO 2 Particles by Surface Derivatization with Ruthenium Complexes
Author(s) -
Duonghond Dung,
Serpone Nick,
Grätzel Michael
Publication year - 1984
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19840670413
Subject(s) - chemistry , ruthenium , cleavage (geology) , bifunctional , photochemistry , catalysis , redox , sensitization , derivatization , bond cleavage , irradiation , ligand (biochemistry) , inorganic chemistry , organic chemistry , high performance liquid chromatography , biochemistry , physics , geotechnical engineering , receptor , fracture (geology) , nuclear physics , engineering , immunology , biology
Irradiation of acidic (pH 2) solutions of RuL 3 2+ 2Cl − (L = diisopropyl 2,2′‐bipyridine‐4,4′ ‐dicarboxylate) in the presence of TiO 2 at 100°C leads to the loss of one bipyridyl ligand and the chemical fixation of RuL 2 at the surface of teh TiO 2 particles through formation of Ru‐O‐Ti bonds. These surface complexes are very stable and shift the absorption onset of TiO 2 beyond 600 mm. Efficient sensitization H 2 ‐generation is achieved with this system beginning in the wave length domain between 590 and 665 nm. Preliminary water cleavage experiments with bifunctional TiO 2 /Pt/RuO 2 redox catalyst are reported.