Category: 15746-57-3

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Ruthenium carbonyl compounds containing polypyridine ligands as catalysts in the reaction of N-benzylideneaniline hydrogenation

The synthesis and characterization of ruthenium complexes containing polypyridine ligands: Ru(dppz)(PPh3)2Cl2, Ru(bpy)(PPh3)2Cl2, Ru(phen)(PPh 3)2Cl2, Ru(dppz-Cl)(PPh3) 2Cl2, Ru(phen)(CO)2Cl2, Ru(bpy)(CO)2Cl2 and Ru(dppz)(CO)2Cl2 (where dppz: dipyrido[3,2-a:2?,3?-c]phenazine, dppz-Cl: 10-chlororodypirido[3,2-a:2?,3?-c]phenazine, phen: 1,10-phenanthroline and bipy: 2,2?-bipyridine) are reported. The ruthenium complexes show high activity as catalysts in the hydrogenation reaction of N-benzylideneaniline and the hydrogen transfer reaction. The products of the catalysis were obtained with conversions between 21 and 91% after 2 h of reaction. The Ru(phen)(CO)2Cl2 complex was the catalyst that showed the highest conversion (91%) for the hydrogenation of N-benzylideneaniline. The complexes Ru(dppz)(PPh3)2Cl 2, Ru(bpy)(PPh3)2Cl2 and Ru(dppz)(CO)2Cl2 showed 99% conversion in the hydrogen transfer reaction.

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

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Electropolymerisable bipyridine ruthenium(II) complexes. Synthesis and electrochemical characterisation of 4-(3-methoxystyryl)- and 4,4?-di(3-methoxystyryl)-2,2?-bipyridine ruthenium complexes

A number of new ruthenium polypyridyl complexes with mono- or di-(3-methoxystyryl) substituted bipyridines have been synthesized. The complexes were characterised by NMR, elemental analysis, UV-vis absorption and emission spectroscopy, and cyclic voltammetry. Electroactive polymer films of these complexes have been prepared both by oxidative and reductive electropolymerisation. The polymers have been characterised by UV-vis absorption spectroscopy and cyclic voltammetry. Possible processes involved in the polymerisation and the structure of the film are discussed.

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

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Characterization of the Initial Intermediate Formed during Photoinduced Oxygenation of the Ruthenium(II) Bis(bipyridyl)flavonolate Complex

A ruthenium(II) flavonolate complex, [RuII(bpy)2fla][BF4], was synthesized to model the reactivity of the flavonol dioxygenases. The treatment of dry CH3CN solutions of [RuII(bpy)2fla][BF4] with dioxygen under light leads to the oxidative O-heterocyclic ring opening of the coordinated substrate flavonolate, resulting in the formation of [RuII(bpy)2(carboxylate)][BF4] (carboxylate = O-benzoylsalicylate or benzoate) species, as determined by electrospray ionization mass spectrometry. Moderation of the excitation and temperature allowed isolation and characterization of an intermediate, [RuII(bpy)2bpg][BF4] (bpg = 2-benzoyloxyphenylglyoxylate), generated by the 1,2-addition of dioxygen to the central flavonolate ring.

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., Related Products of 15746-57-3

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

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Synthesis, characterization and DNA binding studies of two Ru(II) complexes containing guanidinium ligands

Two new Ru(II) complexes containing guanidinium groups have been synthesized, characterized and analyzed according to their interactions with different G-quadruplexes and duplex DNA. A FRET assay and a competitive FRET assay showed that both complexes promote the formation and stabilization of the human telomeric (h-telo) G-quadruplex and exhibit higher selectivity compared to promoters (such as c-myc, c-kit and bcl2) or duplex DNA. After binding to G-quadruplex, the two complexes have shown different DNA affinity and fluorescence enhancement. CD analyses further indicate that the two complexes display the ability to induce and stabilize the formation of antiparallel G-quadruplex structures in K+, Na+ or ion-free buffers. The binding stoichiometry with h-telo was of the order of three ruthenium complexes per quadruplex.

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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.Formula: C20H16Cl2N4Ru

Stepwise Photoinduced Electron Transfer in a Tetrathiafulvalene-Phenothiazine-Ruthenium Triad

A molecular triad comprising a [Ru(bpy)3]2+ (bpy = 2,2?-bipyridine) photosensitizer, a primary phenothiazine (PTZ) donor and a secondary (extended) tetrathiafulvalene (exTTF) donor was synthesized and explored by UV/Vis transient absorption spectroscopy. Initial photoinduced electron transfer from PTZ to the 3MLCT-excited [Ru(bpy)3]2+ occurs within less than 60 ps, and subsequently PTZ is regenerated by electron transfer from exTTF with a time constant of 300 ps. The resulting photoproduct comprising exTTF¡¤+ and [Ru(bpy)3]+ has a lifetime of 6100 ps in de-aerated CH3CN at room temperature. Additional one- and two-pulse laser flash photolysis studies of the triad were performed in the presence of excess methyl viologen (MV2+), to explore the possibility of light-driven charge accumulation on exTTF. MV2+ clearly oxidized [Ru(bpy)3]+ and thereby re-instated ground-state [Ru(bpy)3]2+ in triads in which exTTF had been oxidized to exTTF¡¤+, but further excitation of the solution containing the exTTF¡¤+-PTZ-[Ru(bpy)3]2+ photoproduct did not provide evidence for exTTF2+. Nevertheless, it seems that the design principle of a covalent donor-donor-sensitizer triad (as opposed to simpler donor-sensitizer dyads) is beneficial for light-driven accumulation of oxidation equivalents. These investigations are relevant in the greater context of multi-electron photoredox chemistry and artificial photosynthesis.

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

15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), molecular formula is C20H16Cl2N4Ru, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 15746-57-3, Recommanded Product: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Synthesis, Spectroscopy, and Electrochemistry of Homo- and Hetero-leptic Ruthenium(II) Complexes of New Pyrazole-containing Bidentate Ligands

Heteroleptic 2+ and homoleptic 2+ complexes, where bipy = 2,2′-bipyridine and L-L’ is one of nine new pyrazole-containing bidentate ligands, have been prepared.Full assignments have been made for the 1H and 13C n.m.r. spectra of the complexes in CD3CN and the origins of the co-ordination-induced shifts are discussed.The absorption spectra and redox properties of the complexes are also discussed.

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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, name: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

A CYCLOMETALLED ANALOGUE OF TRIS(2,2′-BIPYRIDINE)RUTHENIUM(II)

A cyclometalled analogue of the well-known tris(2,2′-bipyridine)ruthenium(II) cation has been prepared from (2-phenylpyridine.The bis(2,2′-bipyridine)(2-phenyl-pyridine-C,N)ruthenium(II) cation is readily prepared from (Ru(bipy)2Cl2) and 2-phenylpyridine in the presence of silver(I); the spectroscopic and electrochemical properties of this species are compared with those of (Ru(bipy)3)(2+).

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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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The Preparation and Study of Bis(2-quinolyl) and Bis(2-[1,8]naphthyridyl) Derivatives of Pyrimidine and Pyrazine as Bridging Ligands for RuII

The 2:1 Friedlaender condensation of 2-aminobenzaldehyde or 2-aminonicotinaldehyde with either 4,6-diacetylpyrimidine or 2,5-diacetylpyrazine leads to a family of four new bis(bidentate) bridging ligands. Subsequent complexation of these ligands with [RuCl 2(bpy)2] (bpy = 2,2?-bipyridine) leads to the corresponding mononuclear and dinuclear mixed-ligand RuII complexes. Analysis of the 1H NMR spectra of these systems affords some insight into their conformational properties. Electronic spectra of the complexes evidence two long-wavelength absorption bands which correspond to typical metal-to-ligand charge transfer states. The energies of these states may be explained by electronegativities of the pendant rings on the bridging ligand as well as the substitution pattern on the central ring. For the dinuclear complexes the lowest energy absorption shows components associated with coordination to the pendant and the central rings. The appearance of two metal-based oxidations gives good evidence for strong intermetalic interaction and Koopman’s theorem is obeyed for all systems. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.

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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., category: ruthenium-catalysts

Photophysical study of DNA-bound complexes containing two covalently linked [Ru(2,2?-bipyridine)3]2+-like centers

The changes in the absorption, steady-state emission, and luminescent lifetime properties, upon binding of binuclear complexes of type [(bpy)2Ru(Mebpy)-(CH2)n-(bpyMe)Ru(bpy) 2]4+ (bpy = 2,2?-bipyridine; Mebpy-= 4-methyl-2,2?-bipyridine-4?-; 1b, n = 5; 1c, n = 7) to double-stranded DNA, have been compared relative to those for the monometallic analogue [Ru(bpy)2(Me2bpy)]2+ (1a) (Me2bpy = 4,4?-dimethyl-2,2?-bipyridine). Mc Ghee von Hippel analysis indicates that the binuclear complexes 1b and 1c bind more than 100 times as strongly to DNA as does 1a. Luminescence lifetime analysis in the presence and absence of DNA resolves at least two distinct binding modes which exhibit markedly different accessibility to oxygen and dissimilar behavior under physiological salt conditions. The binding to DNA by the binuclear complexes shows a much greater resistance to increased NaCl concentration relative to that of the monometallic complex, while plots of log Kobs versus log [Na+] indicate that for both the mononuclear and binuclear complexes electrostatic binding dominates. Absorption spectra measured reveal a complex mode of binding for the bimetallic complexes 1b and 1c under high-loading conditions (e.g., [nucleotide]: [ruthenium center] ? 1.)

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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, Quality Control of: Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Synthesis and in vitro Toxicity of d-Glucose and d-Fructose Conjugated Curcumin?Ruthenium Complexes

A series of carbohydrate-conjugated bis(demethoxy)curcumin (BDC) ligands were synthesized by using the Huisgen copper(I)-catalyzed cycloaddition between azido-functionalized d-glucose and d-fructose as well as propargyl-modified BDC. The unprotected sugar ligands were treated with Ru(bpy)2Cl2to form curcumin-conjugated Ru complexes of general formula Ru(bpy)2(L)Cl. The ligands as well as Ru complexes were analyzed by NMR, IR, UV/Vis, and fluorescence spectroscopy, mass spectrometry as well as by elemental analysis (EA). Incubation of L929, HepG2 and the breast cancer cell line MDA-MB-231 revealed lower cytotoxicity of all carbohydrate-conjugated ligands compared with BDC. The Ru complexes exhibited higher cytotoxicity than the parent ligands, in particular against HepG2 cells, whereas the noncancerous L929 cell line remained unaffected. Unexpectedly, the d-fructose-conjugated ligand and its corresponding Ru complex did not show any significant toxicity against MDA-MB-231 cells.

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