Tag: M.W:400-500

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Patent£¬once mentioned of 37366-09-9, Application In Synthesis of Dichloro(benzene)ruthenium(II) dimer

NOVEL RUTHENIUM COMPLEXES HAVING HYBRID AMINE LIGANDS, THEIR PREPARATION AND USE

The invention relates to a novel class of ruthenium complexes containing phosphine and hybrid amine ligands, their preparation and use as catalysts in the reduction of simple ketones to alcohols by molecular hydrogenation. The reactivity and enantioselectivity of such complexes in the asymmetric hydrogenation of simple ketones could be enchanced by the addition of some selective additives.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

In an article, published in an article, once mentioned the application of 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II),molecular formula is C20H16Cl2N4Ru, is a conventional compound. this article was the specific content is as follows.Recommanded Product: 15746-57-3

Ruthenium and rhenium complexes with silyl-substituted bipyridyl ligands

The preparation of 5,5?-bis(trimethylsilyl)- (1a) and 5,5?-bis(pentamethyldisilanyl)-2,2?-bipyridines (1b) by dehalogenative coupling of the corresponding 2-bromo-5-silylpyridines is described. Silyl substitution causes broad and red shifted pi ? pi* and sigma ? pi* UV-vis absorption bands; electrochemical reduction is facilitated. With these ligands, a series of ruthenium complexes [Ru(bpy)2(L)](PF6)2 (3a, L = 1a; 3b, L = 1b) and [RuL3](PF6)2 (4a, L = 1a; 4b, L = 1b), as well as rhenium compounds Re (L)(CO)3Cl (5a, L = 1a; 5b, L = 1b) (bpy = 2,2?-bipyridine) were synthesized. These complexes give rise to red-shifted metal-to-lig-and charge-transfer absorptions in the region of 460-480 nm for the ruthenium complexes and around 400 nm for the rhenium complexes. While the oxidation potentials of ruthenium complexes 3a, 3b, 4a, and 4b are almost the same as that of [Ru(bpy)3](PF6)2, reduction of the ruthenium and rhenium complexes occurs at more positive potentials than that of [Ru(bpy)3](PF6)2 and Re(bpy)(CO)3Cl. Band maxima of the metal-to-ligand charge-transfer emission of the ruthenium and the rhenium complexes were observed at 620 and 610 nm, respectively. The results indicate that the LUMO levels of 2,2?-bipyridine and its metal complexes are lowered by electron-accepting effects of trimethylsilyl and pentamethyldisilanyl substituents, while the HOMO level of bpy is elevated by pentamethyldisilanyl substitution due to the effective sigma-pi conjugation between an Si-Si bonding orbital and a bpy pi orbital.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.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, Recommanded Product: 15746-57-3

Ruthenium(II) complexes with the mixed ligands 2,2?-bipyridine and 4,4?-dialkyl ester-2,2?-bipyridine as pure red dopants for a single-layer electrophosphorescent device

The mixed-ligand polypyridine ruthenium(II) complexes, [Ru(bpy) 2(dmeb)]2+(PF6-)2 (Ru(dmeb)2+) and [Ru(bpy)2(dbeb)]2+(PF 6-)2 (Ru(dbeb)2+), where bpy is bipyridine, dmeb is 4,4?-dimethyl ester-2,2?-bipyridine, and dbeb is 4,4?-dibutyl ester-2,2?-bipyridine, are synthesized and characterized, and their spectroscopic, electrochemical, and electroluminescent properties are reported. Both Ru(II) complexes showed strong emission from the triplet metal-to-ligand charge-transfer excited state, red-shifted emission spectra (lambdamax = 642 nm), and good solubility in organic solvents compared to the frequently used tris(bipyridine) Ru(II) complexes. The electrochemical measurements for these Ru complexes showed reversible and quasi-reversible redox processes, implying a potential improvement in the stability of the electroluminescent device. The electrophosphorescent devices were fabricated by doping them in a polymer host using a simple solution spin-coating technique. For a single-layer device with the 1.0 wt % Ru(dbeb)2+-doped polymer blends of poly(vinylcarbazole) (PVK) and 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazol (PBD) as the emitting layer and with the metal Ba as the cathode, an external quantum efficiency of 3.0%, a luminous efficiency of 2.4 cd/A, and a maximum brightness of 935 cd/m 2 are reached with an electroluminescence (EL) spectral peak at 640 nm and Commission Internationale de L’Eclairage chromaticity coordinates of x = 0.64 and y = 0.33, which were comparable with standard red color.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 15746-57-3, C20H16Cl2N4Ru. A document type is Article, introducing its new discovery., Quality Control of: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Preparation and Characterisation of 2,2′-Bipyridine-4,4′-disulphonic and -5-sulphonic Acids and their Ruthenium(II) Complexes. Excited-state Properties and Excited-state Electron-transfer Reactions of Ruthenium(II) Complexes containing 2,2′-Bipyridine-4,4′-disulphonic Acid or 2,2′-Bipy..

We report the syntheses of 2,2′-bipyridine-4,4′-disulphonic acid (H2bp-4,4′-ds) and 2,2′-bipyridine-5-sulphonic acid (Hbp-5-s), and several ruthenium(II) complexes derived therefrom, including 4-, 2- (bipy=2,2′-bipyridine), , and – and their 2,2′-bipyridine-4,4′-dicarboxylic acid (H2bpdc) analogues, viz. 4-, 2-, and .Some novel thioalkyl derivatives of 2,2′-bipyridine, including 4,4′-di(methylthio)-2,2′-bipyridine, 4,4′-di(ethylthio)-2,2′-bipyridine, and 4,4′,6,6′-tetra(methylthio)-2,2′-bipyridine, were also prepared and characterised during the course of this investigation.The luminescent states of the complexes 4-, 2-, 4-, 2-, and were studied using variable-temperature lifetime measurements.Studies of the quenching of <2+>*, <>*, <2->*, and <4->* by 1,1′-dimethyl-4,4′-bipyridinium bromide (methyl viologen) in aqueous solution as a function of ionic strength have demonstrated that the effects of charge in these electron-transfer reactions can be understood in terms of conventional theories of ionic reactions whilst, at the same time, confirming the effective charges of the ruthenium(II) complex ions.The rate constants for the quenching of <4->* and <2->* by copper(II) ions in neutral aqueous solution show unusual (non-Arrhenius) temperature dependences.A novel kinetic scheme involving parallel inner- and outer-sphere quenching mechanisms has been proposed to account for the observed behaviour.The luminescence decay of <>* in the presence of aqueous copper(II) ions at pH 3.5 is non-exponential.This is interpreted in terms of a combination of static and dynamic quenching effects.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

In an article, published in an article, once mentioned the application of 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II),molecular formula is C20H16Cl2N4Ru, is a conventional compound. this article was the specific content is as follows.Formula: C20H16Cl2N4Ru

Photoacidic and Photobasic Behavior of Transition Metal Compounds with Carboxylic Acid Group(s)

Excited state proton transfer studies of six Ru polypyridyl compounds with carboxylic acid/carboxylate group(s) revealed that some were photoacids and some were photobases. The compounds [RuII(btfmb)2(LL)]2+, [RuII(dtb)2(LL)]2+, and [RuII(bpy)2(LL)]2+, where bpy is 2,2?-bipyridine, btfmb is 4,4?-(CF3)2-bpy, and dtb is 4,4?-((CH3)3C)2-bpy, and LL is either dcb = 4,4?-(CO2H)2-bpy or mcb = 4-(CO2H),4?-(CO2Et)-2,2?-bpy, were synthesized and characterized. The compounds exhibited intense metal-to-ligand charge-transfer (MLCT) absorption bands in the visible region and room temperature photoluminescence (PL) with long tau > 100 ns excited state lifetimes. The mcb compounds had very similar ground state pKa’s of 2.31 ¡À 0.07, and their characterization enabled accurate determination of the two pKa values for the commonly utilized dcb ligand, pKa1 = 2.1 ¡À 0.1 and pKa2 = 3.0 ¡À 0.2. Compounds with the btfmb ligand were photoacidic, and the other compounds were photobasic. Transient absorption spectra indicated that btfmb compounds displayed a [RuIII(btfmb-)L2]2+? localized excited state and a [RuIII(dcb-)L2]2+? formulation for all the other excited states. Time dependent PL spectral shifts provided the first kinetic data for excited state proton transfer in a transition metal compound. PL titrations, thermochemical cycles, and kinetic analysis (for the mcb compounds) provided self-consistent pKa? values. The ability to make a single ionizable group photobasic or photoacidic through ligand design was unprecedented and was understood based on the orientation of the lowest-lying MLCT excited state dipole relative to the ligand that contained the carboxylic acid group(s).

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Patent£¬once mentioned of 37366-09-9, Recommanded Product: 37366-09-9

TRANSITION METAL ISONITRILE CATALYSTS

The present disclosure relates to new transition metal isonitrile compounds, processes for the production of the compounds and the use of the compounds as catalysts. The disclosure also relates to the use of the metal isonitrile compounds as catalysts for hydrogenation and transfer hydrogenation of compounds containing one or more carbon-oxygen, and/or carbon-nitrogen and/or carbon-carbon double bonds.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 15746-57-3, C20H16Cl2N4Ru. A document type is Article, introducing its new discovery., COA of Formula: C20H16Cl2N4Ru

Minimizing Side Product Formation in Alkyne Functionalization of Ruthenium Complexes by Introduction of Protecting Groups

The synthesis of alkyne functionalized bipyridine ruthenium complexes are reported. The improved synthetic approach through application of stable protecting groups prevents formation of possible side products while facilitating purification. By applying copper-catalysed azide-alkyne cycloaddition reactions (CuAAC) pyrene units with flexible alkyl linkers are introduced at the periphery of the complex, opening up various applications including surface immobilization and DNA intercalation. All complexes are characterized structurally as well as photophysically, especially regarding the influence of the introduced alkyne and triazolyl substituents on their photophysical behavior.

Interested yet? Keep reading other articles of 15746-57-3!, COA of Formula: C20H16Cl2N4Ru

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Related Products of 37366-09-9. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer. In a document type is Article, introducing its new discovery.

Synthesis, isolation and spectroscopic characterization of Dawson polyoxotungstate-supported, organometallic complex, [{(C6H6)Ru}P2W15V3O62]7-: The two positional isomers

The Dawson polyoxotungstate (POM)-based, organometallic ruthenium(II) complex, [{(C6H6)Ru}P2W15V3O62]7-, was synthesized as two materials, i.e. 1 ¡¤ 2Bu4NCl and 1 ¡¤ 1Bu4NCl (1 = (Bu4N)7[{(C6H6)Ru}P2W15V3O62]), which contained two positional isomers a and b as major or minor species. In isomer a with the overall Cs symmetry, the (C6H6)Ru2+ group was supported on one vanadium(V) octahedral site (two V-O-V bridging oxygens and one O{double bond, long}V terminal oxygen) of the three edge-shared vanadium(V) octahedra (V3 site, B-site) in the Dawson POM-support [1,2,3-P2W15V3O62]9-, whereas in the other isomer b with the overall C3v symmetry, the (C6H6)Ru2+ group was supported on the center of the V3 site in the Dawson POM-support. Material 1 ¡¤ 2Bu4NCl was prepared by a stoichiometric reaction in CH2Cl2 at ambient temperature of the Dawson POM-support (Bu4N)9[1,2,3-P2W15V3O62] with the precursor [(C6H6)RuCl2]2, whereas material 1 ¡¤ 1Bu4NCl was prepared by a stoichiometric reaction in CH3CN under refluxing conditions. The temperature-varied 31P NMR spectra revealed that b was thermodynamically more stable thana.

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Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Article£¬once mentioned of 37366-09-9, COA of Formula: C12H12Cl4Ru2

A highly stable, Au/Ru heterobimetallic photoredox catalyst with a [2.2]paracyclophane backbone

We report the synthesis and catalytic application of a highly stable distance-defined Au/Ru heterobimetallic complex. [2.2]Paracyclophane serves as a backbone, holding the two metal centers in a spatial orientation and metal-metal fixed distance. The Au/Ru heterobimetallic complex is highly stable, easily accessible and exhibits promising catalytic activity in a visible-light mediated dual Au/Ru Meyer-Schuster rearrangement.

The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 37366-09-9 is helpful to your research., COA of Formula: C12H12Cl4Ru2

Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Article£¬once mentioned of 37366-09-9, Product Details of 37366-09-9

Highly enantioselective hydrogenation of steric hindrance enones catalyzed by Ru complexes with chiral diamine and achiral phosphane

An asymmetric hydrogenation of sterically hindered beta,beta- disubstituted enones has been well-established by using a ruthenium complex composed of an achiral diphosphane and a chiral diamine as catalyst, wherein the carbonyl group was selectively hydrogenated to give a wide range of chiral allylic alcohols with high levels of enantioselectivity and complete chemoselectivity.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.Product Details of 37366-09-9, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 37366-09-9, in my other articles.

Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI