Ruthenium trisbipyridyl complexes

Nakahira, T. Graetzel, M. Visible light sensitization of platinized T102 photocatalyst by surface-adsorbed poly(4-vinylpyridine) derivatized with ruthenium trisbipyridyl complex, Makromol. Chem., Rapid Commun. 1985, 6, 341. 

The hypothesis that the high yields obtained in the bifunctional catalytic system is caused by adsorption of the sensitizer on the surface of the colloidal Ti02 particle lead to the discovery of relay free water decomposition systems350. The only components present in solution are a sensitizer and the catalyst. The sensitizers employed331 were ruthenium trisbipyridyl complexes of the structure ... 

Figure 2.16 Structure of the octahedral ruthenium (II) trisbipyridyl complex. The orange colour of this complex results from metal-to-ligand charge-transfer (MLCT) transitions...

The attachment of bipyridine moieties also enables the synthesis of homo- and heteroleptic ruthenium(II)trisbipyridyl complexes with interesting photochemical properties [56]. 

Figure 14. Kb values, from intervalence measurements, on a log scale, as a function of the through-space metal-metal distance +, ruthenium bipyridylpolyene complexes (series 1) , ruthenium bis(terpyridyl) complexes (series 2) , ruthenium bis(cyclometallated) complexes, dipyridylbenzene family (series 3) , ruthenium bis(cyclometallated) complexes, phenylpyridine family (series 4) A, bis(ferrocenyl)polyenes (series 5). Additional measurements a, bis(cyclometallated) complexes, phenylpyridine family with diethynylanthracene as spacer b, bis(ferrocene) with three phenylene and four vinylene units as spacer c, bis[ruthenium(trisbipyridyl)] with five double bonds as spacer. Note that the Cp (dppe)Fe system bridged by octatetrayne (13 A, 0.32 eV) is outside the graph.

Fibrinogen has been rapidly photo-cross-Unked in the presence of ruthenium as the trisbipyridyl complex and the oxidant ammonium or sodium persulfate by light to yield high-molecular-weight products that have strong in vitro adhesive properties [73]. A mixture of fibrinogen (150 mg/mL), 2 mM Ru (bpy)3Cl2, and 20 mM sodium persulfate was prepared, and applied immediately to wounds, followed by... 

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