Application of 15746-57-3, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), molecular formula is C20H16Cl2N4Ru. In a Article，once mentioned of 15746-57-3
The effect of protonation on the spectroscopic properties of Re(I) and Ru(II) complexes with the ligand 11-triphenylamine-dipyrido[3,2-a:2?,3?-c]phenazine (dppz-TAA) are investigated. For [Re(CO)3Cl (dppz-TAA)] protonation with triflic acid in CH2Cl2 results in a depletion of the intraligand charge-transfer transition at 500 nm (epsilon = 17700 M-1 cm-1) and the concomitant grow-in of a band at 780 nm (epsilon = 18200 L mol-1 cm-1). Resonance Raman spectra of the protonated species show a strong band at 1628 cm-1 attributed, through DFT modeling, to a TAA mode with bending of the phenazine NH linkage. The low energy band is also predicted by TD DFT. The behavior of [Ru(bpy)2(dppz-TAA)]Cl2 was studied in aqueous solution as a function of pH. The electronic absorption spectrum shows modest changes as a function of pH. The excited state properties show a short-lived emissive state (lambdamax = 500 nm) that is diminished in intensity at lower pH. The compound also has a long-lived dark state with absorption features at 420 and 700 nm; the lifetime of this state is also pH sensitive varying from 2500 to 500 ns. The dark long-lived state is probed with transient resonance Raman spectroscopy and is assigned as a 3pi; pi? ligand state. This is consistent with DFT studies. From these data the pKa for [Ru(bpy)2(dppz-TAA)]Cl2 is estimated as 4.5.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 15746-57-3 is helpful to your research., Application of 15746-57-3
Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI