Category: copper-catalyst

Reference of 1111-67-7, 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. Reference of 1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a Article, authors is Li, Qun，once mentioned of Reference of 1111-67-7

Electronic Modulation of Electrocatalytically Active Center of Cu7S4 Nanodisks by Cobalt-Doping for Highly Efficient Oxygen Evolution Reaction

Cu-based electrocatalysts have seldom been studied for water oxidation because of their inferior activity and poor stability regardless of their low cost and environmentally benign nature. Therefore, exploring an efficient way to improve the activity of Cu-based electrocatalysts is very important for their practical application. Modifying electronic structure of the electrocatalytically active center of electrocatalysts by metal doping to favor the electron transfer between catalyst active sites and electrode is an important approach to optimize hydrogen and oxygen species adsorption energy, thus leading to the enhanced intrinsic electrocatalytic activity. Herein, Co-doped Cu7S4 nanodisks were synthesized and investigated as highly efficient electrocatalyst for oxygen evolution reaction (OER) due to the optimized electronic structure of the active center. Density-functional theory (DFT) calculations reveal that Co-engineered Cu7S4 could accelerate electron transfer between Co and Cu sites, thus decrease the energy barriers of intermediates and products during OER, which are crucial for enhanced catalytic properties. As expected, Co-engineered Cu7S4 nanodisks exhibit a low overpotential of 270 mV to achieve current density of 10 mA cm-2 as well as decreased Tafel slope and enhanced turnover frequencies as compared to bare Cu7S4. This discovery not only provides low-cost and efficient Cu-based electrocatalyst by Co doping, but also exhibits an in-depth insight into the mechanism of the enhanced OER properties.

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.Reference of 1111-67-7, you can also check out more blogs aboutReference of 1111-67-7

Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, Product Details of 1317-39-1, name is Copper(I) oxide, introducing its new discovery. Product Details of 1317-39-1

Triazapentadienes as acaricides

Certain heteroaryl triazapentadienes with acaricidal properties and their preparation are described.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Related Products of 13395-16-9, One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time.Mentioned the application of 13395-16-9.

Structural characterisation of metal complexes containing 1-[(4-methylphenyl)sulfonamido]-2-[(2-pyridylmethylene)amino]benzene

The interaction of 2-pyridinecarboxaldehyde with N-tosyl-1,2-diaminobenzene leads to the isolation of two different products, {3-[ethoxy(2-pyridyl)methyl]-1-[(4-methylphenyl)sulfonyl]-2-(2-pyridyl)-2,3- dihydro-1H-benzo[d]imidazole}, L1, and {1-[(4-methylphenyl)sulfonyl]-2-(2-pyridyl)-2,3-dihydro-1H-benzo[d] imidazole}, L2, but not to the expected Schiff base 1-[(4-methylphenyl)sulfonamido]-2-[(2-pyridylmethylene)amino]benzene, HL3. Two kinds of complexes, containing the potentially tridentate and monoanionic [L3]- as a ligand, were obtained by different routes. ML3(p-Tos)(H2O)n complexes (p-TosH = p-toluenesulfonic acid; M = Co, Cu, Zn; n = 1-3) have been isolated by electrolysis of a solution phase composed of L1 and p-toluenesulfonic acid, using metal plates as the anode. Metal complexes of composition ML32(H2O)n (M = Mn, Co, Cu, Zn; n = 0-2) were obtained by template synthesis from M(acac)2, 2-pyridinecarboxaldehyde and N-tosyl-1,2-diaminobenzene. All these compounds have been characterised by elemental analyses, magnetic measurements, IR, mass spectrometry and, in the case of M = Zn, by 1H NMR spectroscopy. CuL3(p-Tos)(H2O), 1, ZnL3(p-Tos)(H2O), 2, CoL32, 3, CuL32, 4 and ZnL32 · 2CH3CN, 5, were also crystallographically characterised.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1111-67-7, name is Cuprous thiocyanate, introducing its new discovery. name: Cuprous thiocyanate

Two novel cation-induced supramolecular polymers with 2-3D polymeric cuprous thiocyanate frameworks: Synthesis, characterization and photocatalytic activities for the degradation of organic dye contaminants

In order to systematically explore the photocatalytic activity of the inorganic-organic supramolecular polymers induced by 1,1?-(1,n-alkylidene)bis[4-methylpyridinium] (n = 1-2) cations, two novel cation-induced compounds, {(bmpm) [Cu2(SCN)4]}n (bmpm = 1,1?-methylenebis[4-methylpyridinium] (1) and {(bmpe) [Cu2(SCN)4]}n (bmpe = 1,1?-(1,2-ethanediyl)bis[4-methylpyridinium] (2) were obtained and characterized by X-ray crystallography. Compound 1 has a 3D framework with the cations trapped within host network cavities. Compound 2 possesses an infinite 2D supramolecular polypseudorotaxane structure linked by bridging thiocyanate groups. The third-order NLO, optical band gaps and photocatalytic activities of 1 and 2 were also evaluated. Remarkably, both 1 and 2 exhibited good photocatalytic abilities.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Because a catalyst decreases the height of the energy barrier, COA of Formula: CCuNS, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.COA of Formula: CCuNS, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a article，once mentioned of COA of Formula: CCuNS

Exocyclic coordination chemistry of an O2S2- macrocycle with copper(i), mercury(ii) and palladium(ii) ions

The preparation and structures of the exocyclic coordination-based supramolecular complexes of a 14-membered dibenzo-O2S 2-macrocycle, L, with thiaphilic soft metal ions Cu(i), Hg(ii) and Pd(ii) are reported. The X-ray crystal structures of the eight complexes have been determined, and a range of the less common structural types, including mono- and multinuclear species with discrete and infinite forms were obtained. L reacts with copper(i) halides and afforded isostructural complexes of type [(Cu2X2)L]n (1: X = Cl, 2: X = Br) adopting a two-dimensional (2-D) polymeric structure linked by square-type Cu 2X2 clusters, while copper(i) iodide gave a yellow emissive complex {[(Cu4I4)L2]·2.5H 2O}n (3) whose crystal structure was not available. Treatment of L with copper(i) thiocyanate gave an infinite 2-D coordination network [CuLSCN]n (4) in which copper atoms are linked by SCN – forming a 1-D backbone, then further cross-linked by Lvia Cu-S bonds resulting in a grid-type layered structure. Reactions of L with HgX 2 (X = Br and I) resulted in the formation of an interesting “ivy-leaves” shaped complex [HgLBr2]n (5) with a syndiotactic arrangement and a single-stranded complex [(Hg2I 4)L]n (6), respectively, adopting an infinite 1-D structure. Unlike the copper(i) and mercury(ii) complexes with the infinite structures, reactions of L with Pd(NO3)2 gave a 1:1 (metal-to-ligand) dinitrato complex cis-[PdL(NO3)2] (7) and a 1:2 bis(macrocycle) complex cis-[PdL2](NO3) 2 (8) in a discrete form depending on the molar ratio of the reactants. A straightforward one-pot reaction of Pd(NO3)2 with two equivalents of L also resulted in the isolation of the bis(macrocycle) complex 8. The comparative NMR and ESI-mass studies for the palladium(ii) complexes were also carried out. The results are discussed in terms of the exo-coordination modes as well as the anion coordination.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

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. Cuprous thiocyanate,introducing its new discovery. HPLC of Formula: CCuNS

The quantification of thiosulfate and polythionates in gold leach solutions and on anion exchange resins

Analytical procedures based on ion chromatography utilising an anion exchange column and UV detection are described for the quantification of thiosulfate, polythionates and gold thiosulfate both in leach solutions and adsorbed on anion exchange resins. The analysis of resins involves a two step perchlorate strip, and since perchlorate is used as the chromatography eluent, the high background concentration in the sample has little effect on the retention. Results are reported for the analysis of gold thiosulfate leach solutions and it is shown that tetrathionate and pentathionate are the dominant reaction products from thiosulfate oxidation at pH 8.5 and 9, whilst trithionate and sulfate are formed at pH 10.4. An increase in thiosulfate consumption when increasing pH from 8.5 to 9 is attributed to the increase in the rate of copper(I) oxidation with increasing ammonia concentration. However, the rate of thiosulfate consumption is higher at pH 9.0 than pH 10.4, and this is explained in terms of the differing reaction products. The adsorption of thiosulfate, polythionates and gold thiosulfate onto anion exchange resins is also discussed with reference to the quantification of the equilibrium solution and resin concentration of each species. Isotherms for gold on resin vs. gold in solution are reported for solutions of various polythionate concentrations.

Interested yet? Keep reading other articles of 100361-18-0!, HPLC of Formula: CCuNS

Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Application of 1317-39-1, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Patent, and a compound is mentioned, 1317-39-1, Copper(I) oxide, introducing its new discovery.

Oxime derivatives

The invention concerns oxime derivatives of the formula I STR1 wherein R4 is hydrogen, (1-4C)alkyl, halogeno-(2-4C)alkyl, hydroxy-(2-4C)alkyl, cyano-(1-4C)alkyl, phenyl or phenyl-(1-4C)alkyl; R5 is hydrogen, (1-4C)alkyl, halogeno-(2-4C)alkyl, hydroxy-(2-4C)alkyl, cyano-(1-4C)alkyl, phenyl or phenyl-(1-4C)alkyl, or a heteroaryl moiety selected from pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, furyl, thienyl, oxazolyl and thiazolyl; A4 is (1-4C)alkylene; Ar1 is phenylene, pyridinediyl or pyrimidinediyl; A1 is a direct link to X1 or A1 is (1-4C)alkylene; X1 is oxy, thio, sulphinyl or sulphonyl; Ar2 is phenylene, pyridinediyl, pyrimidinediyl, thiophenediyl, furandiyl or thiazolediyl; R1 is hydrogen, (1-4C)alkyl, (3-C)alkenyl or (3-4C)alkynyl; and R2 and R3 together form a group of the formula –A2 –X2 –A3 — wherein each of A2 and A3 is independently (1-3C)alkylene and X2 is oxy, thio, sulphinyl, sulphonyl or imino; or a pharmaceutically-acceptable salt thereof; processes for their manufacture; pharmaceutical compositions containing them and their use as 5-lipoxygenase inhibitors.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Application of 13395-16-9, One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time.Mentioned the application of 13395-16-9.

Magnetic properties of chalcogenide spinel CuCr2Se4 nanocrystals

The magnetic properties of chalcogenide spinel CuCr2Se4 nanocrystals have been studied as a function of crystallite size (15-30 nm). A solution-based method is used for the facile synthesis of the nanocrystals with good size control. They have close to cubic morphology with a narrow size distribution and exhibit superparamagnetic behavior at room temperature. The Curie temperature and saturation magnetization of the nanocrystals are lower as compared with the bulk and decrease with decreasing nanocrystal size. A similar trend is observed in the paramagnetic state for the Curie-Weiss temperature and effective magnetic moment. The low temperature magnetization behavior can be qualitatively explained by spin glass dynamics.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

An article , which mentions Application In Synthesis of Cuprous thiocyanate, molecular formula is CCuNS. The compound – Cuprous thiocyanate played an important role in people’s production and life., Application In Synthesis of Cuprous thiocyanate

Synthesis of perfluoroalkyl thioethers from aromatic thiocyanates by iron-catalysed decarboxylative perfluoroalkylation

Easily available aryl and heteroaryl thiocyanates were converted into the corresponding perfluoroalkyl thioethers via decarboxylation of potassium perfluoroalkylcarboxylates, catalysed by the inexpensive and environmentally benign iron(III) chloride.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Application of 1111-67-7, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1111-67-7, molcular formula is CCuNS, introducing its new discovery.

11% efficiency solid-state dye-sensitized solar cells with copper(II/I) hole transport materials

Solid-state dye-sensitized solar cells currently suffer from issues such as inadequate nano-pore filling, low conductivity and crystallization of hole-transport materials infiltrated in the mesoscopic TiO2 scaffolds, leading to low performances. Here we report a record 11% stable solid-state dye-sensitized solar cell under standard air mass 1.5 global using a hole-transport material composed of a blend of [Cu (4,4?,6,6?-tetramethyl-2,2?-bipyridine)2](bis(trifluoromethylsulfonyl)imide)2 and [Cu (4,4?,6,6?-tetramethyl-2,2?-bipyridine)2](bis(trifluoromethylsulfonyl)imide). The amorphous Cu(II/I) conductors that conduct holes by rapid hopping infiltrated in a 6.5 mm-thick mesoscopic TiO2 scaffold are crucial for achieving such high efficiency. Using time-resolved laser photolysis, we determine the time constants for electron injection from the photoexcited sensitizers Y123 into the TiO2 and regeneration of the Y123 by Cu(I) to be 25 ps and 3.2 ms, respectively. Our work will foster the development of low-cost solid-state photovoltaic based on transition metal complexes as hole conductors.

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Reference：
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”