Category: 10049-08-8

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, Computed Properties of Cl3Ru

Studies in kinetics and mechanism of oxidation of d-glucose and d-fructose by alkaline solution of potassium iodate in the presence of Ru(III) as homogeneous catalyst

Kinetics of oxidation of d-glucose (glc) and d-fructose (fru) by potassium iodate has been studied for the first time in alkaline medium using Ru(III) as homogeneous catalyst. The linear dependence of the reaction rate at lower [IO3-] and [OH-] tends towards zero-order at their higher concentrations. Experimental results also show that the order with respect to [Ru(III)] is unity and the order with respect to [reducing sugar] is zero in the oxidation of both glc and fru. Variation in [Cl-] and ionic strength (mu) of the medium does not affect the oxidation rate. The species, [RuCl2(H2O)2(OH)2]- and IO3-, were found to be the reactive species of Ru(III) chloride and potassium iodate in alkaline medium, respectively. The reactions have also been studied at four different temperatures and with the help of observed values of pseudo-first-order rate constant (k1), the entropy of activation and other activation parameters have been calculated. A common mechanism, where the rate determining step involves the interaction between reactive species of Ru(III) chloride and reactive species of potassium iodate resulting in the formation of an activated complex,{A figure is presented}has been proposed. The formation of activated complex is very well supported by the spectrophotometric evidence, observed kinetic data and also by the negative entropy of activation observed for the oxidation of both glc and fru. Arabinonic acid and formic acid were identified as the main oxidation products of the reactions.

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

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CATALYSIS OF HYDROSILYLATION. VII. CATALYSIS OF HYDROSILYLATION OF C=C BONDS BY RUTHENIUM PHOSPHINE COMPLEXES

A full account of the catalysis of hydrosilylation of the C=C bond in olefins, their derivatives with functional groups as well as in vinyl-trisubstituted silanes by ruthenium(II) and ruthenium(III) phosphine precursors is given.The ruthenium complexes are far more efficient catalysts for the hydrosilylation of 1-alkenes and vinyl-substituted silanes than for the substituted olefins and unsaturated esters.General features characterizing all hydrosilylation reactions catalyzed by the above catalysts are as follows: the reaction proceeds with alkoxy-substituted silanes(also with vinylsilanes) in the absence of solvent, and is enhanced (for RuII and olefins occurs exclusively) in the presence of molecular oxygen.Two general mechanisms are proposed for hydrosilylation of olefins and of vinylsilanes, respectively, which account for most of the experimental observations.

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

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Ru(iii)-based compounds with sulfur donor ligands: Synthesis, characterization, electrochemical behaviour and anticancer activity

In recent years, Ru(iii) complexes have emerged as a new class of effective anticancer agents against tumors that proved to be resistant to all other chemotherapeutic drugs currently in clinical use. To extend our previous studies on metal complexes containing sulfur-donor ligands, we report here on the synthesis and characterization, by means of several spectroscopic and analytical techniques, some [Ru(RSDT)3] and [Ru2(RSDT) 5]Cl complexes with dithiocarbamato ligands derived from methyl/ethyl/tert-butyl esters of sarcosine. Their electrochemical behaviour was also studied by cyclic voltammetry. All the complexes were tested for their cytotoxicity on a panel of human tumor cell lines showing highly significant antitumor activity. The chemical and biological properties of the newly synthesized complexes, were compared with those of [Ru(DMDT)3] and [Ru2(DMDT)5]Cl species (DMDT = N,N- dimethyldithiocarbamate) whose chemical (not biological) characterization has been already reported in literature.

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

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Electrochemical Reduction of Some Tris(beta-diketonato)ruthenium(III) Complexes in Acetonitrile and Interaction of the Reduced Anions with Lithium and Sodium Ions

In tetraethylammonium perchlorate-acetonitrile solution, (R1,R3= -CH3, -CF3, -C6H5, -C(CH3)3; R2= -H, -C6H5) was reversibly reduced at a dropping mercury electrode to the corresponding univalent anion. A linear relationship was found between the half-wave potential and the sum of the Hammett constants of the substituents of ligands. In some cases, the polarogram and the cyclic voltammogram were shifted to more positive potentials in the presence of lithium or sodium ions. This effect was explained quantitatively by the two-step association between the reduction product, -, and alkali metal ions. The association constants were calculated.The K2 values were appreciable and the K1 values were much larger than expected for a simple electrostatic interaction. Furthermore, the K1 values were linearly related to the sum of the Hammett constants of the substituents of the ligands. These results suggest the importance of the local charge distribution on the complex anions. In the presence of lithium ion, – forms Li which is insoluble in acetonitrile.

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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.10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a Article£¬once mentioned of 10049-08-8, Formula: Cl3Ru

A novel family of Ru(II) polypyridyl complexes containing benzocrown ether for Na+ and Li+ probing

Two polypyridyl ligands 4?-(imidazo[4,5-f][1,10]phenanthrolin-2-yl)benzo-12-crown-4 (L1), 4?-(imidazo[4,5-f][1,10]phenanthrolin-2-yl)benzo-15-crown-5 (L2) and corresponding complexes [(bpy)2RuL1-2](PF6)2 (1, and 2) and [Ru(L1-2)3](PF6)2 (3, and 4) have been synthesized. These complexes show metal-to-ligand charge transfer absorption at 458-468 nm and emission at 585-592 nm. Binding ability of the complexes with Li+ and Na+ were investigated by fluorescence and UV-vis titration.

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

10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 10049-08-8, Safety of Ruthenium(III) chloride

Caged amino acids for visible-light photodelivery

We present a photocleavable protecting group based on ruthenium bipyridyl complexes and suitable for amino acid photodelivery. We discuss the photochemical properties of the caged glutamate, which is a major neurotransmitter in the CNS. The molar absorptivity for the caged glutamate at 450 nm is epsilon = 4200 M-1cm-1 and its quantum yield of photore-lease at 450 nm is ?PD = 0.035, which is about 17 times higher than that of the most active organic caged compound at this wavelength. Similar figures are obtained for other ?-amino acids. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

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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.10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a Article£¬once mentioned of 10049-08-8, Recommanded Product: 10049-08-8

Surface and electrochemical characterization of electrodeposited PtRu alloys

PtRu alloys of different compositions were electrodeposited on Au. Twelve alloys between 0% and 100% Pt were characterized with surface sensitive spectroscopies (XPS, LEIS) after transfer from an electrochemical cell to an ultra high vacuum chamber without contact to air. The composition of the thus prepared alloys showed a linear dependence on the concentrations of the deposition solution, but was Pt-enriched both in the bulk and (even more so) at the surface. During the electrochemical reduction of the metal cations, sulfur from the supporting electrolyte 1N H2SO4 was found to be incorporated into the electrodes. Cyclic voltammetry was used for the determination of the electrocatalytic activity of the electrodes for the oxidation of carbon monoxide. The highest activity for this oxidation as measured by the (peak) potential of the CO oxidation cyclovoltammograms was found for a surface concentration of approx. 50% Pt. The asymmetry of this ‘activity curve’ (oxidation potential versus Pt surface concentration) is tentatively explained in terms of a surface structural phase separation.

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

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Sol-gel preparation of rutile type solid solution in TiO2-RuO2 system

The preparation of rutile type solid solutions in (TiO2)x-(RuO2)1-x system in the 0?x?0.7 concentration range is described. The single phase solid solutions are formed by controlled nanocrystallization of amorphous gels prepared by the sol-gel method. The kinetics of this crystallization process has been analyzed. It was found that the crystallization does not correspond to the Johnson-Mehl-Avrami model and it can be described by the two-parameter Sestak-Berggren kinetic model.

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

10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 10049-08-8, COA of Formula: Cl3Ru

Red and blue luminescent metallo-supramolecular coordination polymers assembled through pi-pi interactions

The use of pi-stacking interactions to control the aggregation of photo-active metal centres is explored through the design of bis(2,2?;6?,2?-terpyridyl) metal complexes functionalised with biphenyl ‘tails’. Aryl-aryl interactions control the aggregation of the metal complexes into polymetallic arrays in the solid state. Cobalt(n), ruthenium(n), nickel(n), copper(n), zinc(n) and cadmium(n) bis-ligand complexes and a mixed ligand ruthenium(n) complex have been structurally characterised. The solid-state structures are dependent on which units dominate the pi-stacking. For cobalt, ruthenium, nickel and copper, biphenylene-biphenylene interactions lead to linear rod-like arrays, while for the group 12 d10 ions zinc and cadmium, biphenylene-pyridyl interactions lead to two-dimensional sheets. The addition of the biphenylene tail has favourable effects on the photophysical-properties of the complexes which exhibit room temperature red (ruthenium) or blue (zinc and cadmium) luminescence, both in solution and the solid state. The Royal Society of Chemistry 2000.

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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. 10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a Conference Paper£¬once mentioned of 10049-08-8, Computed Properties of Cl3Ru

Thermally stable ruthenium-based catalyst for methane combustion

Ruthenium shows high thermal stability when incorporated in perovskite type structure. Perovskite type lanthanum ruthenate materials can be synthesized using various improved methods and can be used even for high temperature applications like methane combustion. La3.5Ru4.0O 13 material in supported and un-supported forms has been synthesized using various techniques, mostly used for the first time to synthesize this material. This improved synthesis of La3.5Ru4.0O 13 resulted in improved physical and catalytic properties. This paper reports synthesis of supported and un-supported La3.5Ru 4.0O13 materials and laboratory evaluations of their catalytic activity towards methane combustion reaction. La3.5Ru 4.0O13 shows high thermal stability, which could be due to stable 4+ oxidation state of ruthenium and its incorporation in perovskite type structure. Ruthenium based materials show good activity for methane oxidation probably due to intrinsic activity of their ruthenium component. La 3.5Ru4.0O13 type ruthenium(IV) based perovskite has been synthesized in supported and unsupported forms. They show high thermal stability and good catalytic activity for methane combustion reaction.

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