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http://dx.doi.org/10.5012/bkcs.2007.28.6.921

Photochemical Hydrogen Evolution in K4Nb6O17 Semiconductor Particles Sensitized by Phosphonated Trisbipyridine Ruthenium Complexes  

Jung, Young-Hee (Department of Chemistry, Pukyong National University)
Shim, Hyun-Kwan (Department of Chemistry, Pukyong National University)
Kim, Hyun-Woo (Department of Chemistry, Pukyong National University)
Kim, Yeong-Il (Department of Chemistry, Pukyong National University)
Publication Information
Bulletin of the Korean Chemical Society / v.28, no.6, 2007 , pp. 921-928 More about this Journal
Abstract
Three different phosphonated trisbipyridine ruthenium complexes, [(4-CH3-4'-CH2PO(OH)2-2,2'-bipyridine)- (bpy)2Ru]·(PF6)2 (Ru-P1), [(4-CH3-4'-CH2PO(OH)2-2,2'-bipyridine)3Ru]·(PF6)2 (Ru-P2), and [(4,4'-CH2PO- (OH)2-2,2'-bipyridine)3Ru]·(PF6)2 (Ru-P3) were synthesized and their photochemical and electrochemical properties were studied. These ruthenium complexes were strongly adsorbed on the surface of the layered metal oxide semiconductor K4Nb6O17 that was partially acid-exchanged and sensitized up to pH 10, while the carboxylated ruthenium complex, (4,4'-COOH-2,2'-bipyridine)3Ru·Cl2 (Ru-C) that was previously studied was sensitized only below pH 4. The visible light water reduction at K4Nb6O17 that was internally platinized and sensitized by these phosphonated Ru-complexes was comparatively studied using a reversible electron donor iodide.
Keywords
Layered metal oxide semiconductor; $K_4Nb_6O_{17}$; Phosphonated trisbipyridine ruthenium complexes; Water splitting;
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