Category: copper-catalyst

1111-67-7, 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.1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS, introducing its new discovery.

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.

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

 

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. 13395-16-9, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 13395-16-9, name is Bis(acetylacetone)copper. In an article£¬Which mentioned a new discovery about 13395-16-9

Standard enthalpies of formation and combustion of a crystalline copper complex with tetramethyltetraethylporphine

The heat of combustion of a copper complex with 2,7,12,17-tetramethyl-3,8,13,18-tetraethylporphine was measured in an isothermal liquid calorimeter with a stationary calorimetric bomb. The standard enthalpies of combustion and formation of the complex studied were calculated (DeltacH =-21694.77 ¡À 12.54 kJ/mol, DeltafH = 3796.59 ¡À 12.60 kJ/mol).

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 13395-16-9 is helpful to your research. 13395-16-9

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

 

13395-16-9, 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.13395-16-9, Name is Bis(acetylacetone)copper, molecular formula is C10H16CuO4, introducing its new discovery.

Highly Monodisperse Cu-Sn Alloy Nanoplates for Efficient Nitrophenol Reduction Reaction via Promotion Effect of Tin

The hexagonal copper-tin alloy (Cu-Sn) nanoplates were synthesized using a high temperature solvent method, the length of six equilateral edges of hexagonal Cu-Sn nanoplates was 23 nm, and the thickness was 13 nm. The obtained hexagonal Cu-Sn nanoplates were highly monodisperse and allowed the formation of nanoarrays arranged with long-range order. The hexagonal Cu-Sn nanoplates exhibited high catalytic activity on catalytic hydrogenation of 4-nitrophenol to 4-aminophenol. Due to the promotion effect of Sn, the apparent rate constant (ka) of hexagonal Cu-Sn nanoplates was three times that of Cu nanoparticles. The density functional theory (DFT) calculations and experimental results demonstrated that Sn could promote the coordination process of -NO2 of 4-nitrophenol with Cu-Sn nanoplates and contribute to activation of 4-nitrophenol. In addition, the hexagonal Cu-Sn nanoplates showed high stability and reusability for the reduction reaction, good adaptability in different pH and the ionic strength, and wide applicability for the degradation of methylene blue, methyl orange, and rhodamine B, even in the industrial wastewater, suggesting that the Cu-Sn nanoplates are promising catalysts in organic industry wastewater treatment.

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

 

Copper(I) bromide, cas is 7787-70-4, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,7787-70-4

To a Schlenk flask containing deoxygenated absolute ethanol (50 mL) was added in the following order, the CuBr (0.19 mmol, 0.027 g) and the ligand (L) (0.38 mmol, 0.10 g). The resulting solution was stirred at room temperature for 14 h. The solution was concentrated and a white precipitate appeared. The solid obtained was filtered off, and washed with diethyl ether (5 mL) under anaerobic conditions and dried under vacuum. 5: (Yield. 82%). Anal. Calc. for C30H28CuN8O2 (596.14 amu): C, 53.30; H, 4.17; N, 16.57. Found: C, 53.56; H, 4.27; N, 16.46%. Conductivity (Omega-1 cm2 mol-1, 1.2 * 10-3 M in CH3OH): 90. IR: (KBr, cm-1): 3325 nu(O-H), 3075 nu(C-H)ar, 2941 nu(C-H)al, 1604-1566 (nu(C=C), nu(C=N))ar, 1464 (delta(C=C), delta(C=N))ar, 1098, 1086 delta(C-H)ar,ip, 765, 696 delta(C-H)ar,oop. 1H NMR: (DMSO-d6 solution, 250 MHz, 298 K) delta: 8.67/8.62 [1H/1H, d, 3J = 4.7 Hz, 3J = 4.8 Hz, Hortho/Hortho’], 8.52/8.08 [1H/1H, t, 3J = 7.3 Hz, 3J = 7.0 Hz, Hpara/Hpara’], 8.05/7.94 [1H/1H, d, 3J = 7.3 Hz, H4/H4′], 7.62 [1H, s, Hpz], 7.83/7.55 [1H/1H, m, Hmeta/Hmeta’], 4.54 [2H, t, 3J = 5.1 Hz, NCH2-CH2OH], 4.02 [2H, t, 3J = 5.1 Hz, NCH2-CH2OH], 4.02 [2H,t, 3J = 5.1 Hz, NCH2-CH2OH]. In this complex, the signal attributableto proton hydroxyl (OH) is not observed. 13C{1H] NMR:(DMSO-d6 solution, 63 MHz, 298 K) delta: 158.5/153.2 (Cortho/Cortho’),143.4/140.2 (Cpara/Cpara’), 129.3/127.2 (C4/C40), 126.1/123.4 (Cmeta/Cmeta’), 108.2 (Cpz), 64.5, (NCH2-CH2OH), 58.6 (NCH2-CH2OH)ppm. ESI(+)(m/z) (%) = 596 (100%) [Cu(L)2]+.

With the rapid development of chemical substances, we look forward to future research findings about Copper(I) bromide

Reference£º
Article; Guerrero, Miguel; Calvet, Teresa; Font-Bardia, Merce; Pons, Josefina; Polyhedron; vol. 119; (2016); p. 555 – 562;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(II) trifluoromethanesulfonate, cas is 34946-82-2, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,34946-82-2

A solution of Cu(OTf)2 (90.0 mg, 0.249 mM) in methanol was added to a solution of HLpz (53.5 mg, 0.250 mM) and triethylamine (25.0 mg, 0.250 mM) in methanol, affording a dark green solution. A solution of NaN3 (16.3 mg, 0.250 mM) was then layered on the above solution from which blue crystals of 3 suitable for X-ray analysis were obtained (55 mg, 69% yield). Anal. Calcd for C11H9CuN7O: C,41.44; H, 2.85; N, 30.76. Found: C, 40.56; H, 2.77; N, 30.18. UV-vis (CH3OH) [lambdamax, nm(epsilon, M-1 cm-1)]: 354 (5000), 646 (290). FTIR (KBr): 3430, 2055, 1640, 1376, 1164, 1050,866, 769, 660 cm-1. EPR (9.450 GHz, Mod. Amp. 5.0 G, CH3OH, 77 K): g|| = 2.248,g? 2:037, and A|| = 165 G. ESI-MS (MeOH): m/z = 341 [Cu(Lpz)N3 + Na]+, 659{[Cu(Lpz)N3]2 + Na}+, 977 {[Cu(Lpz)N3]3 + Na}+.

With the rapid development of chemical substances, we look forward to future research findings about Copper(II) trifluoromethanesulfonate

Reference£º
Article; Houser, Robert P.; Wang, Zhaodong; Powell, Douglas R.; Hubin, Timothy J.; Journal of Coordination Chemistry; vol. 66; 23; (2013); p. 4080 – 4092;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

7787-70-4,7787-70-4, Copper(I) bromide is a copper-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

CuBr (0.2 g, 1.39 mmol) wasdissolved in a mixture of dichloromethane (30 ml) and acetonitrile (30 ml) and then 2-benzylpyridine (0.23 g, 1.39 mmol)dissolved in dichloromethane (20 ml) was added. The mixture was stirred for 2 h at room temperature and allowed to standovernight. The next day the colour of the solution was green indicating the oxidation of Cu(I) to Cu(II) and the green solidwas filtered off and recrystallized from methanol. Yield (70%).

As the paragraph descriping shows that 7787-70-4 is playing an increasingly important role.

Reference£º
Article; Aguirrechu-Comeron; Pasan; Gonzalez-Platas; Ferrando-Soria; Hernandez-Molina; Journal of Structural Chemistry; vol. 56; 8; (2015); p. 1563 – 1571; Zh. Strukt. Kim.; vol. 56; 8; (2015); p. 1624 – 1632;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(I) bromide, cas is 7787-70-4, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,7787-70-4

General procedure: [CuBr(CNR)3] (1-4). Any one of the isocyanides CNR (R=Xyl, 2-Cl-6-MeC6H3, 2-Naphtyl, Cy) (3.1mmol) was added to a suspension of CuBr (143mg, 1.0mmol) in chloroform (5mL) and the reaction mixture was stirred at RT for 1h. The solvent was removed in vacuo and the product was recrystallized by slow concentration of a CH2Cl2/hexane solution at RT to give colorless (1, 2, and 4) or orange (3) crystalline solid.

7787-70-4 is used more and more widely, we look forward to future research findings about Copper(I) bromide

Reference£º
Article; Melekhova, Anna A.; Novikov, Alexander S.; Luzyanin, Konstantin V.; Bokach, Nadezhda A.; Starova, Galina L.; Gurzhiy, Vladislav V.; Kukushkin, Vadim Yu.; Inorganica Chimica Acta; vol. 434; (2015); p. 31 – 36;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(II) trifluoromethanesulfonate, cas is 34946-82-2, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,34946-82-2

To a solution of 6.90 g (18.5 mmol) of 5′-bromo-3′-nitro-3,4,5,6-tetrahydro-2H- [l,2′]bipyridinyl-4-yl)-acetic acid in dimethylsulfoxide (100 mL) is added 4.5 mL (41 mmol) of dimethylethylenediamine followed by 4.0 g (39 mmol) of sodiummethanesulfinate and 5.5 g (19 mmol) of copper (II) triflate. The mixture is heated to 130 C for lhour then cooled to room temperature. The mixture is diluted with water and stirred overnight during which time a solid precipitates from solution. The yellow solid is collected by filtration, washed with water and dried on the filter pad to provide 5.00 g (72.6%) of (5′-methanesulfonyl-3′-nitro-3,4,5,6-tetrahydro-2H-[l,2′]bipyridinyl-4-yl)- acetic acid ethyl ester.

34946-82-2 is used more and more widely, we look forward to future research findings about Copper(II) trifluoromethanesulfonate

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; GINN, John David; SORCEK, Ronald John; TURNER, Michael Robert; WU, Di; WU, Frank; WO2011/84985; (2011); A1;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Name is Copper(II) trifluoromethanesulfonate, as a common heterocyclic compound, it belongs to copper-catalyst compound, and cas is 34946-82-2, its synthesis route is as follows.,34946-82-2

General procedure: A mixture of ligand L (23.1 mg, 55 mumol) and appropriate metalsalt (55 mumol) in nitromethane (20 mL) was stirred at room temperaturefor 48 h under the normal atmosphere. The complexeswere isolated as a solids by evaporation of the solvent and followedby a dissolution of the residue in the minimum volume of CH3CNand precipitation of the complexes by the gradual addition ofether. Obtained solids were filtered off and dried in air.

With the complex challenges of chemical substances, we look forward to future research findings about Copper(II) trifluoromethanesulfonate

Reference£º
Article; Wa??sa-Chorab, Monika; Marcinkowski, Dawid; Kubicki, Maciej; Hnatejko, Zbigniew; Patroniak, Violetta; Polyhedron; vol. 118; (2016); p. 1 – 5;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Name is Copper(II) trifluoromethanesulfonate, as a common heterocyclic compound, it belongs to copper-catalyst compound, and cas is 34946-82-2, its synthesis route is as follows.,34946-82-2

L (0.0424g, 0.2mmol), Cu (CF 3SO 3) 2(0.0691g,0.2mmol)H 2O (6mL), CH 3CN (4mL),hot water 100 O slow C down to room temperature after three days. After opening theautoclave there for X- ray diffraction analysis of the yellow rod-like crystals. Yield:35% (calculated based on L).

With the complex challenges of chemical substances, we look forward to future research findings about Copper(II) trifluoromethanesulfonate

Reference£º
Patent; Tianjin Normal University; Wang, Ying; (11 pag.)CN104447810; (2016); B;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”