Category: 15746-57-3

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)

Electropolymerisable bipyridine ruthenium(II) complexes: Synthesis, spectroscopic and electrochemical characterisation of 4-((2-thienyl) ethenyl)- and 4,4?-di((2-thienyl) ethenyl)-2,2? -bipyridine ruthenium complexes

Four new ruthenium polypyridyl complexes with mono- or di-((2-thienyl) ethenyl) substituted bipyridines have been synthesized. The complexes were characterized by NMR, elemental analysis, UV-Vis absorption and electrochemistry (differential pulse and cyclic voltammetry). Electroactive polymer films of these complexes have been prepared by oxidative electropolymerisation and characterized by UV-Vis absorption spectroscopy and electrochemistry. The electrochemically induced polymerisation of the complexes resulted in a significant shift of the oxidation potential of the Ru(II)-Ru(III) process towards more positive potentials. Also, MLCT absorption band of the polymeric complexes is shifted towards shorter wavelengths. These results are interpreted in terms of an interruption of the conjugated system of the (2-thienyl)ethenyl-substituted bipyridine ligands due to a radical polymerisation mechanism affecting rather the ethenyl part of the ligand than the thienyl.

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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.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, Application In Synthesis of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Synthesis, DNA Cleavage Activity, Cytotoxicity, Acetylcholinesterase Inhibition, and Acute Murine Toxicity of Redox-Active Ruthenium(II) Polypyridyl Complexes

Four mononuclear [(L-L)2Ru(tatpp)]2+ and two dinuclear [(L-L)2Ru(tatpp)Ru(L-L)2]4+ ruthenium(II) polypyridyl complexes (RPCs) containing the 9,11,20,22-tetraazatetrapyrido[3,2-a:2?,3?-c:3??,2??-l:2???,3???-n]pentacene (tatpp) ligand were synthesized, in which L-L is a chelating diamine ligand such as 2,2?-bipyridine (bpy), 1,10-phenanthroline (phen), 3,4,7,8-tetramethyl-1,10-phenanthroline (Me4phen) or 4,7-diphenyl-1,10-phenanthroline (Ph2phen). These Ru?tatpp analogues all undergo reduction reactions with modest reducing agents, such as glutathione (GSH), at pH 7. These, plus several structurally related but non-redox-active RPCs, were screened for DNA cleavage activity, cytotoxicity, acetylcholinesterase (AChE) inhibition, and acute mouse toxicity, and their activities were examined with respect to redox activity and lipophilicity. All of the redox-active RPCs show single-strand DNA cleavage in the presence of GSH, whereas none of the non-redox-active RPCs do. Low-micromolar cytotoxicity (IC50) against malignant H358, CCL228, and MCF7 cultured cell lines was mainly restricted to the redox-active RPCs; however, they were substantially less toxic toward nonmalignant MCF10 cells. The IC50 values for AChE inhibition in cell-free assays and the acute toxicity of RPCs in mice revealed that whereas most RPCs show potent inhibitory action against AChE (IC50 values <15 mum), Ru?tatpp complexes as a class are surprisingly well tolerated in animals relative to other RPCs. Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Application In Synthesis of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), you can also check out more blogs about15746-57-3

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

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), COA of Formula: C20H16Cl2N4Ru.

Photochemical, photophysical and redox properties of novel fulgimide derivatives with attached 2,2?-bipyridine (bpy) and [M(bpy) 3]2+ (M = Ru and Os) moieties

Fulgimides monosubstituted with [M(bpy)3]2+ (M = Ru, Os; bpy = 2,2?-bipyridine) chromophore units and with a single bpy group were synthesized and investigated as components of conceivable dinuclear photochromic switches of luminescence. The E-, Z- and closed-ring (C) photoisomer forms of the bpy-bound fulgimide were successfully separated by semi-preparative HPLC. The same procedure failed, however, in the case of the [M(bpy)3]2+-substituted fulgimides. Energy transfer from the excited photochromic unit to the metal-bpy centre competes with the fulgimide cyclization, reducing the photocyclization quantum yields by approximately one order of magnitude compared to the non-complexed fulgimide-bpy ligand (phiEC = 0.17, phiEZ = 0.071, phiZE = 0.15 at lambdaexc = 334 nm). The cycloreversion of the fulgimide-bpy ligand is less efficient (phiCE = 0.047 at lambdaexc = 520 nm). The intensity of the 3MLCT-based luminescence of the metal-bpy chromophore (in MeCN, phideaer = 6.6 ¡Á 10-2 and taudeaer = 1.09 mus for Ru; phideaer = 6.7 ¡Á 10-3 and taudeaer = 62 ns for Os) is not affected by the fulgimide photoconversion. These results and supporting spectro-electrochemical data reveal that the lowest triplet excited states of the photochromic fulgimide moiety in all its E-, Z- and closed-ring forms lie above the lowest 3MLCT levels of the attached ruthenium and osmium chromophores. The actual components are therefore unlikely to form a triad acting as functional switch of energy transfer from [Ru(bpy)3]2+ to [Os(bpy)3]2+ through the photochromic fulgimide bridge. The Royal Society of Chemistry 2009.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.COA of Formula: C20H16Cl2N4Ru. In my other articles, you can also check out more blogs about 15746-57-3

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.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

Synthesis of new phenanthroline-based heteroditopic ligands – Highly efficient and selective fluorescence sensors for copper(II) ions

The heteroditopic phenanthroline derivatives 5,6-bis(2-pyridylcarboxamido)- 1,10-phenanthroline (H2L1) and 5,6-bis[(4-methoxy-2- pyridyl)carboxamido]-1,10-phenanthroline (H2L2) have been prepared and characterized, together with their luminescent ruthenium(II) complexes [Ru(bpy)2(H2L1,2)]-(PF 6)2 and [Ru(H2L1) 3](PF6)2 and the corresponding iron(II) complex [Fe(H2L1)3](PF6)2. In these complexes, the metal ion is coordinated by the bidentate phen site of H2L. The luminescence of the ruthenium complexes (lambda ex = 450 nm, lambdaemca. 620 nm) is completely quenched by Cu2+ ions in the micromolar concentration range and, to a lesser extent, by other metal ions. At pH 5, the response of the luminescent sensors is highly Cu2+-selective. Heterodinuclear complexes [Ru(bpy) 2(LM)](PF6)2, [Ru(LM)3](PF 6)2, and [Fe(LM)3](PF6)2 have been isolated for M = Cu2+, Ni2+, Co2+, and Pd2+. It is suggested that M is coordinated to the tetradentate N4 site of L by two deprotonated amide N atoms and two pyridyl groups. This coordination type is confirmed by the EPR spectrum of the compound [Ru II(bpy)2(L1CuII)](PF 6)2. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.

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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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Structure and properties of diastereoisomers of a ruthenium(II) complex having a pyridylpyrazoline derivative as a ligand

Diastereoisomers of a heteroleptic ruthenium complex, [Ru(bpy)2L]2+ (bpy = 2, 2?-bipyridine, L = 5-(4-nitrophenyl)-1-phenyl-3-(2-pyridyl)-2-pyrazoline) have been isolated. Two isomers have quite similar redox potentials and show MLCT absorptions in the region of 400 to 500 nm with similar absorption maxima at room temperature. By contrast, quite different emission maxima and lifetimes are observed at 77 K.

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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.15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), molecular formula is C20H16Cl2N4Ru. In a Patent£¬once mentioned of 15746-57-3, Recommanded Product: 15746-57-3

Photolabile Compounds

The present invention describes Photolabile Compounds methods for use of the compounds. The Photolabile Compounds have a photoreleasable ligand, which can be biologically active, and which is photoreleased from the compound upon exposure to light. In one embodiment, the light is visible light, which is not detrimental to the viability of biological samples, such as cells and tissues, in which the released organic molecule is bioactive and can have a therapeutic effect.

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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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Photoinduced electron transfer kinetics of linked Ru-Co photocatalyst dyads

Two new supramolecular photocatalyst dyads based on the [Ru(2,2?-bipyridine)3]2+ photosensitizer linked to a macrocyclic Co(II)tetra(pyridyl) catalyst for proton reduction are reported. The dyads differ primarily in the bridging ligand which links the molecular modules; the first being a short and flexible linker, and the second a longer and electronically conjugated linker. Ultrafast transient optical spectroscopy was used to monitor the photoinduced kinetics of the dyads following visible excitation of the photosensitizer module. Direct comparison of transient spectra and kinetics indicates that there are indeed substantial differences between the ultrafast transient optical spectroscopy of the dyads, but there is no indication of oxidative quenching of the photosensitizer module by the catalyst module. These initial design and characterization studies of the linked Ru(II)?Co(II) dyads provide an important foundation for advanced designs of systems for efficient solar energy conversion by molecular architectures.

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Reference£º
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, HPLC of Formula: C20H16Cl2N4Ru

Long Range Photoinduced Electron Transfer in a Rigid Polymer

Electron (hole) tunnelling reactions are studied in a rigid polymer medium by following the reductive quenching of a series of Ru(LL)3(2+)* homologues by a series of aromatic amines.Tunnelling distances up to 12 Angstroem (edge to edge) are observed.The experimental data include a determination of the exponential damping factor alpha in the electronic term (Hab).The data are consistent with a weak dependence of alpha on binding energy.Such a weak dependence is more consistent with a superexchange description than with a barrier tunnelling description of electron (hole) transfer.These reactions are shown to be essentially temperature independent between 298 K and 359 K, but are significantly slower at 77 K.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.HPLC of Formula: C20H16Cl2N4Ru. In my other articles, you can also check out more blogs about 15746-57-3

Reference£º
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, Safety of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II)

Syntheses of a new segmental penta-heterocyclic ligand and its dinuclear ruthenium(II) complex

The new ligand 2,6-bis-[6-(2-pyridinyl)-4-pyrimidinyl] pyridine (2) has been synthesised, in two steps, by a double Claisen condensation, followed by cyclisation with formation of the two pyrimidine rings. The ligand forms a dinuclear ruthenium(II) complex, with coordination through the two terminal bpy-like components, which has been characterised by spectroscopic and electrochemical methods.

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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.COA of Formula: C20H16Cl2N4Ru

A negative activation energy for luminescence decay: Specific solvation effects on the emission properties of bis(2,2′-bipyridine)(3,5-dicarboxy-2,2′-bipyridine)ruthenium(II) chloride

A new mixed-ligand polypyridylruthenium(II) complex, [Ru(bpy)2L]Cl2, has been prepared where bpy = 2,2′-bipyridine and L = 3,5-dicarboxy-2,2′-bipyridine. The ligand L is a non-symmetrically-substituted 2,2′-bipyridine having two hydrophilic carboxylate groups located at the 3- and 5-positions of only one of its two pyridyl rings. In acetonitrile, the photophysical properties of the metal complex include a long-lived excited state (lambda(em) = 637 nm, tau = 846 ¡À 11 ns, Phi = 0.046 at 295 K) whose decay involves an activated crossing to higher energy ligand field states (E(a) = 4170 ¡À 200 cm-1). This behavior is similar to that observed for other ruthenium tris(bipyridyl) compounds. In contrast, the title compound displays several unusual photophysical properties in aqueous solution. These include a strongly red-shifted emission (lambda(em) = 685 nm) having a short, pH-dependent lifetime which is quenched by an excited-state proton transfer from solvent. The completely deprotonated form of the molecule is the dominant emissive species. Surprisingly, under neutral conditions the excited-state lifetime increases with increasing temperature, from a value of tau = 54 ¡À 1 ns (lambda(em) = 686 nm, Phi(em) = 0.0036) at 280 K to tau = 75 ¡À 1 ns (lambda(em) = 675 nm, Phi(em) = 0.0053) at 360 K. The data are fit to the Arrhenius expression to give E(a) = -270 ¡À 15 cm-1 in H2O and E(a) = -178 ¡À 10 cm-1 in D2O. Thermochromic emission data and temperature-induced energy-gap law behavior indicate that the unique photophysical properties of this compound are due to specific interactions involving protic solvent.

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