Reference of 108-47-4, Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter.108-47-4, Name is 2,4-Dimethylpyridine, molecular formula is C7H9N. Belongs to chiral-nitrogen-ligands compound. In a article,once mentioned of 108-47-4
Two mononuclear ruthenium complexes [Ru(H2tcbp)(isoq)2] (1) and [Ru(H2tcbp)(pic)2] (2) (H4tcbp=4,4?,6,6?-tetracarboxy-2,2?-bipyridine, isoq=isoquinoline, pic=4-picoline) are synthesized and fully characterized. Two spare carboxyl groups on the 4,4?-positions are introduced to enhance the solubility of 1 and 2 in water and to simultaneously allow them to tether to the electrode surface by an ester linkage. The photochemical, electrochemical, and photoelectrochemical water oxidation performance of 1 in neutral aqueous solution is investigated. Under electrochemical conditions, water oxidation is conducted on the deposited indium-tin-oxide anode, and a turnover number higher than 15,000 per water oxidation catalyst (WOC) 1 is obtained during 10 h of electrolysis under 1.42 V vs. NHE, corresponding to a turnover frequency of 0.41 s-1. The low overpotential (0.17 V) of electrochemical water oxidation for 1 in the homogeneous solution enables water oxidation under visible light by using [Ru(bpy)3]2+ (P1) (bpy=2,2?-bipyridine) or [Ru(bpy)2(4,4?-(COOEt)2-bpy)]2+ (P2) as a photosensitizer. In a three-component system containing 1 or 2 as a light-driven WOC, P1 or P2 as a photosensitizer, and Na2S2O8 or [CoCl(NH3)5]Cl2 as a sacrificial electron acceptor, a high turnover frequency of 0.81 s-1 and a turnover number of up to 600 for 1 under different catalytic conditions are achieved. In a photoelectrochemical system, the WOC 1 and photosensitizer are immobilized together on the photoanode. The electrons efficiently transfer from the WOC to the photogenerated oxidizing photosensitizer, and a high photocurrent density of 85 muA cm-2 is obtained by applying 0.3 V bias vs. NHE. WOC immobilized on a semiconductor: Two mononuclear RuII complexes with free carboxyl groups (water-oxidation catalyst, WOC) can anchor covalently to a semiconductor. The electrochemical, photochemical, and photoelectrochemical water oxidation performance of the assembly devices in neutral aqueous solution is investigated (see figure).
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis