Related Products of 15746-57-3, An article , which mentions 15746-57-3, molecular formula is C20H16Cl2N4Ru. The compound – Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II) played an important role in people’s production and life.
An ambidentate dicarboxylic acid bipyridine ligand, (4,5-diazafluoren-9- ylidene) malonic acid (dfm), was synthesized for coordination to Ru(II) and mesoporous nanocrystalline (anatase) TiO2 thin films. The dfm ligand provides a conjugated pathway from the pyridyl rings to the carbonyl carbons of the carboxylic acid groups. X-ray crystal structures of [Ru(bpy) 2(dfm)]Cl2 and the corresponding diethyl ester compound, [Ru(bpy)2(defm)](PF6)2, were obtained. The compounds displayed intense metal-to-ligand charge transfer (MLCT) absorption bands in the visible region (epsilon > 11,000 M-1 cm-1 for [Ru(bpy)2(dfm)](PF6)2 in acetonitrile). Significant room temperature photoluminescence, PL, was absent in CH 3CN but was observed at 77 K in a 4:1 EtOH:MeOH (v:v) glass. Cyclic voltammetry measurements revealed quasi-reversible RuIII/II electrochemistry. Ligand reductions were quasi-reversible for the diethyl ester compound [Ru(bpy)2(defm)]2+, but were irreversible for [Ru(bpy)2(dfm)]2+. Both compounds were anchored to TiO2 thin films by overnight reactions in CH3CN to yield saturation surface coverages of 3 × 10-8 mol/cm2. Attenuated total reflection infrared measurements revealed that the [Ru(bpy)2(dfm)]2+ compound was present in the deprotonated carboxylate form when anchored to the TiO2 surface. The MLCT excited states of both compounds injected electrons into TiO2 with quantum yields of 0.70 in 0.1 M LiClO4 CH3CN. Micro- to milli- second charge recombination yielded ground state products. In regenerative solar cells with 0.5 M LiI/0.05 M I2 in CH3CN, the Ru(bpy) 2(dfm)/TiO2 displayed incident photon-to-current efficiencies of 0.7 at the absorption maximum. Under the same conditions, the diethylester compound was found to rapidly desorb from the TiO2 surface.
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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI