Tag: M.W:200-300

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Efficient green procedures for the preparation of novel tetraalkynyl-substituted phthalocyanines

This work provides a successful, easy and efficient process for the preparation of metal-free 2(3),9(10),16(17),23(24)-octamethoxyphthalocyanine, [(OMe)8PcH2] (2), and its metal complexes [(OMe)8PcM] (3-11) (M = Zn, Cu, Ni, Mg, Co, Fe, Ru, TiCl and RhCl) by using green energy techniques such as exposure to UV-irradiation as well as microwave irradiation. Two different routes have been used, which involve modifications to that reported in the literature. The results suggest that these techniques drastically reduce the reaction time of metallophthalocyanine [(OMe)8PcM] (3-11) formation from 5-96 h to 5-11 min. The prepared octamethoxyphthalocyanines [(OMe)8PcM] (2-4) (M = H2, Zn, Cu) are used as key materials to synthesize the corresponding novel tetraalkynyl-substituted phthalocyanines 15-17.

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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, Application In Synthesis of Ruthenium(III) chloride

Liquid-phase oxidation of alcohols by oxygen and nitrous oxide catalysed by Ru-Co oxide

Chemoselective catalysts in bulk or supported on gamma-Al 2O3 binary oxides RuIV-CoIII (Ru/Co = 1:1-1:2), prepared by co-precipitation, were used for liquid-phase oxidation of saturated and unsaturated primary and secondary alcohols to aldehydes and ketones with O2 or N2O. The catalysts can be separated by filtration and reused. No leaching of Ru or Co in solution was observed. The oxidation is enhanced by the presence of hydration water in the Ru-Co catalyst, which indicates the participation of active RuIV hydroxo species in the reaction. From XRD and TGA, the Ru-Co oxide can be approximated as a hydrous binary oxide comprising the amorphous RuO2 and heterogenite-3R cobaltic acid CoO(OH). The alcohol oxidation appears to occur by a nonradical mechanism, which may be viewed as an oxidative dehydrogenation of alcohols to form an aldehyde or ketone. H2-TPR shows that CoIII practically does not affect the oxidising ability of RuO2. This suggests that the cobalt is likely to enhance catalyst reoxidation by O 2 rather than to play a significant role in the alcohol dehydrogenation. The alcohol oxidation by N2O exhibits a close similarity to the oxidation by O2 but is much less efficient. Much more active catalysts are required to make the oxidation with N2O synthetically useful.

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

Synthetic Route of 10049-08-8, 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.10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a patent, introducing its new discovery.

Synthesis, molecular, crystal and electronic structure of [RuCl 3(NO)(PPh3)(HPz)]

The reaction of [RuCl3(NO)(PPh3)2] complex with pyrazole has been examined. The new ruthenium complex – [RuCl 3(NO)(PPh3)(C3 H4N2)] has been obtained and characterised by IR and UV-Vis measurements. Crystal, molecular and electronic structures of the complexes have been determined. The electronic spectrum of the complex was calculated by the TDDFT method.

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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 20759-14-2, Name is Ruthenium(III) chloride hydrate,molecular formula is Cl3H2ORu, is a conventional compound. this article was the specific content is as follows.COA of Formula: Cl3H2ORu

WATER-SOLUBLE WILKINSON’S COMPLEX IS HOMOGENEOUS CATALYST FOR THE PHOTOCHEMICAL REDUCTION OF WATER.

A water-soluble Wilkinson’s complex, chlorotris(diphenylphosphinobenzene-m-sulphonate)rhodium(I) (Rh**ICl(dpm)//3**3** minus ), was examined as a homogeneous catalyst for the reduction of water coupled with the photoreaction of Ru(bpy)//3**2** plus using ascorbic acid as a sacrificial electron donor. A high quantum yield of H//2(440 nm), i. e. 0. 30, was obtained at pH 5. This value was found to be limited by the photochemical generation of Ru(bpy)//3** plus , indicating that the catalytic process maintained by the rhodium complex is almost quantitative.

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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, Safety of Ruthenium(III) chloride

Substituted pyridazines as ligands in homoleptic (fac and mer) and heteroleptic Ru(ii) complexes

This article reports the preparation of a range of phenyl, pyridyl and pyrazinyl substituted pyridazines via the inverse electron demand [2 + 4] Diels-Alder reaction between 3,6-di(2-pyridyl)-1,2,4,5-tetrazines (bptz) and 3,6-di(2-pyrazinyl)-1,2,4,5-tetrazines (bpztz) and suitable dienophiles including acenaphthalene. The resulting polyaromatic compounds vary systematically in the number of aromatic substituents and the number and position of N-heteroatoms. For four of these compounds, the effect of the molecular changes on the solid-state structures were investigated using single crystal X-ray crystallography. The pyridazines were used as bidentate ligands in {M(ii)(bipy)2} and tris(homoleptic) complexes (M = Fe, Ru). The optical and electrochemical properties of these complexes reflect the electron accepting character of the new ligands. The facial and meridional isomers of the tris complexes could be separated by column chromatography (on silica), thus allowing a spectral comparison of their absorption and emission properties. The solid-state structures of several of the metal complexes are discussed, including that of the facial isomer of the tris Ru(ii) complex of 3,6-bis(2-pyridyl)-4,5-bis(4-pyridyl)pyridazine – a potential preformed geometric motif for the predirected construction of supramolecular assemblies. The Royal Society of Chemistry 2011.

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

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Bi- and tri-nuclear ruthenium(II) complexes containing tetrapyridophenazine as a rigid bridging ligand

The rigid, aromatic bis-tridentate bridging ligand tetrapyrido[2,3-a:3?,2?-c:2?,3?-h:3?,2?-j] phenazine (tpp) allowed the preparation of linear, stable bi- and tri-nuclear complexes of ruthenium(n) exhibiting low energy Ru ? tpp MLCT absorptions and a strong electronic coupling in the mixed-valence state.

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

Electric Literature of 10049-08-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a Article£¬once mentioned of 10049-08-8

A trimetallic mixed Ru(II)/Fe(II) terpyridyl complex with a long-lived excited state in solution at room temperature

The photophysical behavior of a series of mono- and trimetallic Ru(II) and mixed Ru(II)/Fe(II) bis-terpyridyl complexes was examined. The complexes have bridging terpyridyl ligands linked by phenylene-vinylene substituents on the terpyridyl. For the complexes bridged by a single phenylene-vinylene, the lowest-energy excited state is metal-to-ligand charge transfer (MLCT), and excited-state decay is on the 1-10 ns time scale. The complexes with two phenylene-vinylene groups have thermally equilibrated excited states that are localized on the phenylene-vinylene bridge and have much longer lifetimes (>200 ns). Remarkably, the trimetallic complex having an Fe(II) terpyridyl center also has a long-lived excited state, despite the fact that low-energy iron-localized excited states exist on the complex. Copyright

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

Electric Literature of 10049-08-8, 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.10049-08-8, Name is Ruthenium(III) chloride, molecular formula is Cl3Ru. In a patent, introducing its new discovery.

SPECTROPHOTOMETRIC DETERMINATION OF RUTHENIUM(III) AND RHODIUM(III) WITH 9,10-PHENANTHRENEQUINONE MONOXIME AFTER EXTRACTION INTO MOLTEN NAPHTHALENE.

9,10-Phenanthrenequinone monoxime has been used as a reagent for the spectrophotometric determination of ruthenium(III) and rhodium(III) after extraction into molten naphthalene. The extracted mixture of the metal complex and naphthalene was dissolved in chloroform and ruthenium and rhodium were determined spectrophotometrically. Beer’s law holds in the concentration range of 0. 2-4. 1 mu g/cm**3 for ruthenium and 0. 3-5. 3 mu g/cm**3 for rhodium in 10 cm**3 of the final solution. Interference of various ions has been studied and the method has been applied to the determination of ruthenium and rhodium in various synthetic mixtures. This procedure is also applied to the simultaneous determination of ruthenium and rhodium present together in a solution.

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

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Synthesis of binuclear amide complexes of Ru (III) and study of their catalytic activity in epoxidation of alkenes

Syntheses of the binuclear amide complexes of Ru (III) are described. The catalytic activity of the complexes, which are highly soluble in water, was examined by carrying out the epoxidations of norbornene, cis-cyclooctene and trans-octene to give the respective oxides in the presence of the oxidant iodosylbenzene. The reactions were monitored by UV-Vis and R spectroscopy and cyclic voltammetry, and the reaction mechanism elucidated.

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

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Post-coordination functionalisation of pyrazolyl-based ligands as a route to polynuclear complexes based on an inert RuIIN6 core

The simple mononuclear complex [Ru(H2bpp)2][PF 6]2 [H2bpp = 2,6-bis(pyrazol-3-yl)pyridine] contains four coordinated pyrazolyl ligands which each have a reactive NH site at the position adjacent to the coordinated N atom. Alkylation of these with either 2-[1-{4-(bromomethyl)benzyl}-1H-pyrazol-3-yl]pyridine or 4?-[(4-bromomethyl)phenyl]terpyridine allows attachment of four additional chelating groups, either bidentate pyrazolyl-pyridine and terdentate terpyridyl units, respectively, which are pendant from the central kinetically inert RuIIN6 complex core. These functionalised mononuclear complexes [Ru(L1)2][PF6]2 (with four pendant pyrazolyl-pyridine bidentate sites) and [Ru(L2) 2][PF6]2 (with four pendant terpyridyl sites) can be used as the starting point for polynuclear assemblies by attachment of additional labile metal ions as the secondary sites. As examples of this we prepared and structurally characterised the trinuclear complex [RuAg 2(L1)2][ClO4]4, an unusual example of a polynuclear helicate containing a kinetically inert metal centre, and the pentanuclear complex [RuCu4(MeCN)5(H 2O)1.5(L2)2](SbF6) 6(BF4)4 in which each of the pendant terpyridyl sites of the [Ru(L2)2]2+ core is coordinated to a Cu(ii) ion. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

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