Category: ruthenium-catalysts

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a Article£¬once mentioned of 10049-08-8, category: ruthenium-catalysts

Tuning of redox potentials by introducing a cyclometalated bond to bis-tridentate ruthenium(II) complexes bearing bis(N -methylbenzimidazolyl) benzene or -pyridine ligands

A series of asymmetrical bis-tridentate cyclometalated complexes including [Ru(Mebib)(Mebip)]+, [Ru(Mebip)(dpb)]+, [Ru(Mebip)(Medpb)]+, and [Ru(Mebib)(tpy)]+ and two bis-tridentate noncyclometalated complexes [Ru(Mebip)2]2+ and [Ru(Mebip)(tpy)]2+ were prepared and characterized, where Mebib is bis(N-methylbenzimidazolyl)benzene, Mebip is bis(N-methylbenzimidazolyl) pyridine, dpb is 1,3-di-2-pyridylbenzene, Medpb is 4,6-dimethyl-1,3-di-2- pyridylbenzene, and tpy is 2,2?:6?,2?-terpyridine. The solid-state structure of [Ru(Mebip)(Medpb)]+ is studied by X-ray crystallographic analysis. The electrochemical and spectroscopic properties of these ruthenium complexes were studied and compared with those of known complexes [Ru(tpy)(dpb)]+ and [Ru(tpy)2]2+. The change of the supporting ligands and coordination environment allows progressive modulation of the metal-associated redox potentials (Ru II/III) from +0.26 to +1.32 V vs Ag/AgCl. The introduction of a ruthenium cyclometalated bond in these complexes results in a significant negative potential shift. The RuII/III potentials of these complexes were analyzed on the basis of Lever’s electrochemical parameters (E L). Density functional theory (DFT) and time-dependent DFT calculations were carried out to elucidate the electronic structures and spectroscopic spectra of complexes with Mebib or Mebip ligands.

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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 10049-08-8, Name is Ruthenium(III) chloride,molecular formula is Cl3Ru, is a conventional compound. this article was the specific content is as follows.Recommanded Product: 10049-08-8

Characteristic and electrocatalytic behavior of ruthenium Prussian blue analogue film in strongly acidic media

The remarkable stability of ruthenium Prussian blue analogue (designated as RuOx-PB) in strongly acidic media and for the enzymeless electrocatalytic oxidation of glucose was demonstrated in this study. The RuOx-PB combinative film neither dissolves nor denatures in concentrated acids, such as HClO4, HCl, H2SO4, and HNO3, investigated in this study. The catalytic response was found to directly proportional to [H+]. Such features are unique since neither RuOx- nor PB-based compounds are effective for direct carbohydrate oxidation in acidic media. The RuOx-PB film showed a highly reversible redox peak at ?1.2 V in 5 M HClO4 as a result of the fast proton-coupled electron transfer behavior of high valent ruthenium intermediate, RuVII/VI. The formation of internal multiple-hydrogen bond as well as the generation of the ?RuVII{double bond, long}O species in strongly acidic media were proposed to play a key role in this feature. The RuOx-PB holds high potential for use in catalytic oxidation, corrosion protection, biofuel cell, etc.

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

Synthetic Route of 10049-08-8, An article , which mentions 10049-08-8, molecular formula is Cl3Ru. The compound – Ruthenium(III) chloride played an important role in people’s production and life.

Structural and electrochemical characterization of binary, ternary, and quaternary platinum alloy catalysts for methanol electro-oxidation

The bifunctional model for methanol electro-oxidation suggests that competent catalysts should contain at least two types of surface elements: those that bind methanol and activate its C-H bonds and those that adsorb and activate water. Our previous work considered phase equilibria and relative Pt-C and M-O (M = Ru, Os) bond strengths in predicting improved activity among single-phase Pt-Ru- Os ternary alloys. By addition of a correlation with M-C bond strengths (M = Pt, Ir), it is possible to rationalize the recent combinatorial discovery of further improved Pt-Ru-Os-Ir quaternaries. X-ray diffraction experiments show that these quaternary catalysts are composed primarily of a nanocrystalline face-centered cubic (fcc) phase, in combination with an amorphous minor component. For catalysts of relatively high Ru content, the lattice parameter deviates positively from that of the corresponding arc-melted fee alloy, suggesting that the nanocrystalline fee phase is Pt-rich. Anode catalyst polarization curves in direct methanol fuel cells (DMFC’s) at 60 AC show that the best Pt-Ru-Os-Ir compositions are markedly superior to Pt-Ru, despite the higher specific surface area of the latter. A remarkable difference between these catalysts is revealed by the methanol concentration dependence of the current density. Although the rate of oxidation is zero order in [CH3OH] at potentials relevant to DMFC operation (250-325 mV vs RHE) at Pt-Ru, it is approximately first order at Pt-Ru-Os-Ir electrodes. This finding implies that the quaternary catalysts will be far superior to Pt-Ru in DMFC’s constructed from electrolyte membranes that resist methanol crossover, in which higher concentrations of methanol can be used.

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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 10049-08-8, Name is Ruthenium(III) chloride,molecular formula is Cl3Ru, is a conventional compound. this article was the specific content is as follows.Product Details of 10049-08-8

Kinetics and Mechanism of Ruthenium(III)-Catalysed Oxidation of Triethanolamine by Hexacyanoferrate(III) in Alkaline Medium

The title reaction, studied spectroscopically, shows a second order rate dependence on and first order dependence each on and .The rate is proportional to > where k’ and k” are rate constants for the uncatalysed and Ru(III) catalysed reactions respectively.Ea values calculated for k’ and k” paths are in agreement with those obtained experimentally for the uncatalysed and catalysed reactions respectively.

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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, Computed Properties of C12H12Cl4Ru2

Arene ruthenium complexes as versatile catalysts in water in both transfer hydrogenation of ketones and oxidation of alcohols. Selective deuterium labeling of rac-1-phenylethanol

The preparation of three series of arene Ru(II) half-sandwich compounds with the functional ligand 4,4?-dimethoxy-2,2?-bipyridine (dmobpy) is described. The new cationic derivatives have the general formula [(eta6-arene)RuCl(kappa2-N,N-dmobpy)]X (arene = benzene, X = Cl- ([1]Cl), BF4- ([1][BF 4]), TsO- ([1]TsO), PF6- ([1][PF6]); arene = p-cymene (p-cym), X = Cl- ([2]Cl), BF4- ([2][BF4]), TsO- ([2]TsO), PF6- ([2][PF6]); arene = 2-phenoxy-1-ethanol (phoxet), X = Cl- ([3]Cl), BF4- ([3][BF 4]), TsO- ([3]TsO), PF6- ([3][PF6])). The structures of [1]Cl, [1]TsO, [2]TsO, [2][BF 4], and [2][PF6] were determined by X-ray crystallography. All of the complexes except the PF6- salts were water-soluble, and they behaved as active catalysts in two different processes: the transfer hydrogenation of water-soluble and -insoluble ketones to the corresponding alcohols, using HCOONa as the hydrogen source at pH 4, and the oxidation of rac-1-phenylethanol to acetophenone with tBuOOH at pH 7, both in aqueous solution. For the transfer hydrogenation with p-cymene complexes the aqua, formato, and hydride species were detected by means of 1H NMR experiments in D2O. It was found that the cationic hydrido complex was [(eta6-p-cymene)RuD(dmobpy)]+. The reversible and pH-dependent formation of the hydroxo derivative was also observed. When the catalytic transfer hydrogenation was performed in D 2O, the 1-phenylethanol obtained was selectively deuterated at the benzylic carbon. Mechanistic proposals are also included.

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

Reference of 32993-05-8, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a patent, introducing its new discovery.

Cyclopentadienyl-Ruthenium and -Osmium Chemistry. XXII. Synthesis, X-Ray Structure and Some Reactions of RuCl(PPh3)(eta1-Ph2PCH2PPh2)(eta-C5H5), Containing a Monodentate CH2(PPh2)2 Ligand

Stoichiometric amounts of RuCl(PPh3)2(eta-C5H5) and dppm react in refluxing C6H6 to give RuCl(PPh3)(eta1-dppm)(eta-C5H5), which has been fully characterized by an X-ray study (triclinic, space group P<*>, a 22.377(6), b 9.913(2), c 9.826(3) Angstroem, alpha 70.46(2), beta 78.72(2), gamma 80.40(2) deg, Z 2) in which 3299 data were refined to R 0.046, R’ 0.052.Structural parameters are similar to those of other RuX(PR3)2(eta-C5H5) complexes.The chloro complex was converted was converted into + salts; the other PPh3 ligand can be replaced by a second dppm ligand to give +, which contains both mono- and bidentate dppm ligands.Alkylation of the uncoordinated phosphorus with Mel is accompanied by halogen exchange to give I, while reactions with a variety of transition metal complexes result in abstraction of PPh3 and formation of RuCl(dppm)(eta-C5H5).