Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), COA of Formula: C20H16Cl2N4Ru.
Turning on red and near-infrared phosphorescence in octahedral complexes with metalated quinones
We report the synthesis of pi-bonded ruthenium, rhodium, and iridium o-benzoquinones [Cp*M(o-C6H4O2)] n [M = Ru (2), n = 1-; Rh (3), n = 0; Ir (4), n = 0] following a novel synthetic procedure. Compounds 2-4 were fully characterized by spectroscopic methods and used as chelating organometallic linkers, “OM-linkers”, toward luminophore bricks such as Ru(bpy) 22+, Rh(ppy)2+, and Ir(ppy) 2+ (bpy = 2,2?-bipyridine; ppy = 2-phenylpyridine) for the design of a novel family of octahedral bimetallic complexes of the general formula [(L-L)2M(OM-linkers)][X]m (X = counteranion; m = 0, 1, 2) whose luminescent properties depend on the choice of the OM-linker and the luminophore brick. Thus, dinuclear assemblies such as [(bpy)2Ru(2)][OTf] (5-OTf), [(bpy)2Ru(2)][Delta- TRISPHAT] (5-DeltaT) {TRISPHAT = tris[tetrachlorobenzene-1,2-bis(olato)] phosphate}, [(bpy)2Ru(3)][OTf]2 (6-OTf), [(bpy) 2Ru(4)][OTf]2 (7-OTf), [(bpy)2Ru(4)][Delta- TRISPHAT]2 (7-DeltaT), [(ppy)2Rh(2)] (8), [(ppy) 2Rh(3)][OTf] (9-OTf), [(ppy)2Rh(4)][OTf] (10-OTf), [(ppy)2Rh(4)][Delta-TRISPHAT] (10-DeltaT), [(ppy) 2Ir(2)] (11), [(ppy)2Ir(3)][OTf] (12-OTf), [(ppy) 2Ir(4)][OTf] (13-OTf), and [(ppy)2Ir(4)][Delta-TRISPHAT] (13-DeltaT) were prepared and fully characterized. The X-ray molecular structures of three of them, i.e., 5-OTf, 8, and 11, were determined. The structures displayed a main feature: for instance, the two oxygen centers of the OM-linker [Cp*Ru(o-C6H4O2)]- (2) chelate the octahedral chromophore metal center, whether it be ruthenium, rhodium, or iridium. Further, the carbocycle of the OM-linker 2 adopts a eta4-quinone form but with some catecholate contribution due to metal coordination. All of these binuclear assemblies showed a wide absorption window that tailed into the near-IR (NIR) region, in particular in the case of the binuclear ruthenium complex 5-OTf with the anionic OM-linker 2. The latter feature is no doubt related to the effect of the OM-linker, which lights up the luminescence in these homo- and heterobinuclear compounds, while no effect has been observed on the UV-visible and emission properties because of the counteranion, whether it be triflate (OTf) or Delta-TRISPHAT. At low temperature, all of these compounds become luminescent; remarkably, the o-quinonoid linkers [Cp*M(o-C6H4O2)] n (2-4) turn on red and NIR phosphorescence in the binuclear octahedral species 5-7. This trend was even more observable when the ruthenium OM-linker 2 was employed. These assemblies hold promise as NIR luminescent materials, in contrast to those made from organic 1,2-dioxolene ligands that conversely are not emissive.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.COA of Formula: C20H16Cl2N4Ru. In my other articles, you can also check out more blogs about 15746-57-3
Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI