Molecules 2010, 15(7), 4908-4923; doi:10.3390/molecules15074908
Article

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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Received: 25 May 2010; in revised form: 1 July 2010 / Accepted: 14 July 2010 / Published: 14 July 2010
(This article belongs to the Special Issue Photochemistry in Organic Synthesis)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: 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 H2-evolving site, as the catalytic activity of [Pt(ppy)Cl2]- 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)Cl2]- 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 p*(ppy) orbital of the catalyst moiety.
Keywords: solar energy conversion and storage; hydrogen energy; photocatalysis; platinum(II) catalysts; ruthenium complexes; molecular devices
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MDPI and ACS Style

Kobayashi, M.; Masaoka, S.; Sakai, K. 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. Molecules 2010, 15, 4908-4923.

AMA Style

Kobayashi M, Masaoka S, Sakai K. 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. Molecules. 2010; 15(7):4908-4923.

Chicago/Turabian Style

Kobayashi, Masayuki; Masaoka, Shigeyuki; Sakai, Ken. 2010. "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." Molecules 15, no. 7: 4908-4923.

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