Syntheses, Characterization, and Photo-Hydrogen-Evolving Properties of Tris(2,2'-bipyridine)ruthenium(II) Derivatives Tethered to an H2-Evolving (2-phenylpyridinato)platinum(II) Unit
In: Molecules Volume 15 Issue 7 Pages: 4908-4923 Molecules, Jg. 15 (2010), Heft 7, S. 4908-4923
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Zugriff:
With the aim of developing new molecular devices having higher photo-hydrogen-evolving activity, Pt(ppy)ClX units (ppy = 2-phenylpyridinate, X = Cl(-) or DMSO; DMSO = dimethylsulfoxide) have been employed as an H(2)-evolving site, as the catalytic activity of [Pt(ppy)Cl(2)](-) was confirmed to be higher than those of other mononuclear platinum(II) complexes. In the present study, two new heterodinuclear Ru(II)Pt(II) complexes, produced by condensation of [Ru(bpy)(2)(5-amino-phen)](2+) (bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) with [Pt(cppy)Cl(2)](-) and Pt(cppy)(DMSO)Cl (cppy = 9-carboxy-phenylpyridinate), respectively, have been prepared and their photo-hydrogen-evolving activities have been evaluated in detail. The ineffectiveness of these systems as photo-hydrogen-evolving molecular devices are interpreted in terms of their negative driving forces for the photoinduced electron transfer from the triplet MLCT excited state of the Ru chromophore to the pi*(ppy) orbital of the catalyst moiety.
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Syntheses, Characterization, and Photo-Hydrogen-Evolving Properties of Tris(2,2'-bipyridine)ruthenium(II) Derivatives Tethered to an H2-Evolving (2-phenylpyridinato)platinum(II) Unit
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Autor/in / Beteiligte Person: | Kobayashi, Masayuki ; Sakai, Ken ; Masaoka, Shigeyuki |
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Zeitschrift: | Molecules Volume 15 Issue 7 Pages: 4908-4923 Molecules, Jg. 15 (2010), Heft 7, S. 4908-4923 |
Veröffentlichung: | MDPI, 2010 |
Medientyp: | unknown |
ISSN: | 1420-3049 (print) |
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