Synthesis, spectroscopy and photophysical properties of ruthenium triazole complexes and their application as dye-molecules in regenerative solar cells

The complexes [Ru(dcb)2(L)] (L = 3-(2-phenol)-5-(pyridin-2-yl)-1,2,4-triazole (2-ppt), 3-(4-phenol)-5-(pyridin-2-yl)-1,2,4-triazole (4-ppt), 3,5-bis(pyrazin-2-yl)-1,2,4-triazole (bpzt), 3-(2-phenol)-5-(pyrazin-2-yl)-1,2,4-triazole (2-ppzt) and dcb = 4,4’-(CO2H)2-2,2’-bipyridine) have been synthesized, spectroscopically characterized and anchored to nanocrystalline TiO2 electrodes for the conversion of light into electricity in regenerative solar cells. The different efficiencies observed have been rationalized on the basis of an analytical expression relating the incident photon-to-current-conversion efficiency (IPCE) to the kinetic parameters of the relevant electron transfer processes involved in the solar cell

Ruthenium(II) 2,2'-bipyridine Complexes containing Methyl Isocyanide Ligands. Extreme Effects of Nonchromophoric Ligands on Excited-State Properties

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Electropolymerization of molecular assemblies.

Electropolymerization of the ligand-bridged, ruthenium polypyridyl assemblies [(vbpy)(2)ClRu(pz)-RuCl(vbpy) (2)](PF6)2 and [(bpy)(2)(CN)Ru(CN)Ru(vbpy)(2)(NC)Ru(CN)(bpy)(2))](PF6)(2) results in formation of electroactive thin films on Sn-doped indium oxide (ITO), Pt, and glassy-carbon electrodes. The assemblies retain their mixed-valence and photochemical properties in the films as shown below, for example, by the appearance of the Intervalence Transfer (IT) band for poly-[(bpy)(2)-(CN)Ru-II(CN)Ru-III(vbpy)(2)(NC)Ru-II(CN)(bpy)(2))](PF6)(3) on ITO in CD3CN

Remote interfacial electron transfer from supramolecular sensitizers.

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