Day: October 17, 2022

《Giant pressure-enhancement of multiferroicity in CuBr2》 was published in Physical Review Research in 2020. These research results belong to Zhang, J. S.; Xie, Yiqi; Liu, X. Q.; Razpopov, A.; Borisov, V.; Wang, C.; Sun, J. P.; Cui, Y.; Wang, J. C.; Ren, X.; Deng, Hongshan; Yin, Xia; Ding, Yang; Li, Yuan; Cheng, J. G.; Feng, Ji; Valenti, R.; Normand, B.; Yu, Weiqiang. Application In Synthesis of Cupric bromide The article mentions the following:

Type-II multiferroic materials, in which ferroelec. polarization is induced by inversion nonsym. magnetic order, promise new and highly efficient multifunctional applications based on the mutual control of magnetic and elec. properties. Although this phenomenon has to date been limited to low temperatures, here we report a giant pressure dependence of the multiferroic critical temperature in CuBr2. At 4.5 GPa, TC is enhanced from 73.5 to 162 K, to our knowledge the highest value yet reported for a nonoxide type-II multiferroic. This growth shows no sign of saturating and the dielec. loss remains small under these high pressures. We establish the structure under pressure and demonstrate a 60% increase in the two-magnon Raman energy scale up to 3.6 GPa. First-principles structural and magnetic energy calculations provide a quant. explanation in terms of dramatically pressure-enhanced interactions between CuBr2 chains. These large, pressure-tuned magnetic interactions motivate structural control in cuprous halides as a route to applied high-temperature multiferroicity. The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9Application In Synthesis of Cupric bromide)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Application In Synthesis of Cupric bromide

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

《Dynamics of Chiral Cations in Two-Dimensional CuX4 and PbX4 Perovskites (X = Cl and Br)》 was published in Inorganic Chemistry in 2020. These research results belong to Takahashi, Masaki; Hoshino, Norihisa; Sambe, Kohei; Takeda, Takashi; Akutagawa, Tomoyuki. SDS of cas: 7789-45-9 The article mentions the following:

Chiral organic ammonium cations ((R)-2-methylphenethylammonium (R-MPhA) and (R)-3,7-dimethyloctylammonium (R-DMOA)) cations were combined with [MX4]2- anions (M = Cu and Pb, X = Cl and Br) to form two-dimensional (2D) perovskites: (R-MPhA)2CuCl4 (1a), (R-MPhA)2CuBr4 (1b), (R-DMOA)2CuCl4 (2a), (R-DMOA)2CuBr4 (2b), (R-DMOA)2PbCl4 (2c), and (R-DMOA)2PbBr4 (2d). The point shearing of the MX4 octahedron formed 2D perovskite layers, which were sandwiched by the bilayer mol. assembly of chiral organic ammonium cations. We found that the flexible and polar organic R-MPhA and R-DMOA cations in the 2D perovskites played an important role in the phase transition behavior and dielec. responses. Salts 2a-2d showed similar solid-solid (S1-S2) phase transitions, for which the temperatures decreased in the order of CuCl4 (2a) > PbCl4 (2c) > CuBr4 (2b) > PbBr4 (2d). The occupation volume of one R-DMOA per MX4 octahedron determined the dynamic crystalline space for the motional freedom of chiral ammonium in the 2D perovskite layer. Although thermally activated dielec. fluctuations were observed in salts 2a, 2b, and 2c, only an order-disorder-type dielec. phase transition was observed in salt 2d. Interband optical transitions were observed in the CuCl4 and CuBr4 2D perovskites, whereas sharp exciton absorptions were observed in the 2D PbCl4 and PbBr4 layers in perovskite salts 2c and 2d. Chiral organic ammonium cations (R)-2-methylphenethylammonium and (R)-3,7-dimethyloctylammonium were combined with [MX4]2- anions (M = Cu and Pb, X = Cl and Br) to form 2D perovskites. Thermally activated dielec. fluctuations and an order-disorder-type dielec. phase transition was observed in organic layers. Interband optical transitions were observed in the CuCl4 and CuBr4 2D perovskites, whereas sharp exciton absorptions were observed in the 2D PbCl4 and PbBr4 layers.Cupric bromide(cas: 7789-45-9SDS of cas: 7789-45-9) was used in this study.

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.SDS of cas: 7789-45-9

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

Computed Properties of Br2CuIn 2020 ,《Dually-functional riboflavin macromolecule as a supramolecular initiator and reducing agent in temporally-controlled low ppm ATRP》 was published in eXPRESS Polymer Letters. The article was written by Zaborniak, I.; Chmielarz, P.. The article contains the following contents:

A novel supramol. riboflavin-inspired macroinitiator was prepared for the first time by transesterification methodol. and used as the multifunctional vitamin-B2 core to synthesize PBA brushes using different low ppm atom transfer radical polymerization (ATRP) approaches. Firstly the macromol. initiator was successfully applied as a dually-functional structure, which simultaneously acts as a reducing agent in activator regeneration by electron transfer (ARGET) ATRP. Subsequently simplified electrochem. mediated ATRP of BA with different conditions was carried out for the preparation of well-defined riboflavin-based polymer brushes. Polymerizations were characterized in a well-controlled manner, affording polymers with a narrow dispersity (ETH = 1.22-1.25). Four-arms polymers were also received by an approach never described before – temporally-controlled multi-step seATRP under constant current conditions, giving precisely-defined polymer brushes (ETH = 1.26) with preserved chain-end functionality (DCF < 1%), despite stopping and restarting the polymerization The solvolysis results indicate that all chains grow to equal lengths (ETH < 1.17), which shows the precisely controlled characteristic of seATRP. 1H NMR anal. confirms the formation of new vitamin B2-inspired polymers. In connection with the preserved riboflavin functionality and addnl. functional chains, these innovative macromols. may find applications, e.g. as drug delivery systems. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Computed Properties of Br2Cu)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Computed Properties of Br2Cu

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

In 2019,Inorganica Chimica Acta included an article by Dyukova, I. I.; Lavrenova, L. G.; Kuz’menko, T. A.; Komarov, V. Yu.; Sukhikh, T. S.; Vorontsova, E. V.. Synthetic Route of Br2Cu. The article was titled 《Coordination compounds of Co(II) and Cu(II) halides with 2,4-dimethyl-1,2,4-triazolo[1,5-a]benzimidazole》. The information in the text is summarized as follows:

Coordination compounds based on Co(II) and Cu(II) halides with 2,4-dimethyl-1,2,4-triazolo[1,5-a]benzimidazole (L) [ML2Cl2] (M = Co2+ 1 or Cu2+ 2) and [CuL2Br2] (3) were synthesized. The compounds were characterized by single-crystal XRD anal., UV-visible spectroscopy (diffuse reflectance spectra, DRS) and IR spectroscopy. Via XRD structural anal., crystal structures were determined for [CoL2Cl2] 1, [CuL2Cl2] 2 and [Cu2L2(μ-Cl)2Cl2(H2O)2] 3. Cytotoxic effects of the complexes and ligand on cell line Hep-2 were studied, and the formation of a Cu(II) complex with L considerably enhances cytotoxicity. In the part of experimental materials, we found many familiar compounds, such as Cupric bromide(cas: 7789-45-9Synthetic Route of Br2Cu)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Synthetic Route of Br2Cu

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

The author of 《Synthesis of rod-shaped Au-Cu intermetallic nanoparticles and SERS detection》 were Singh, Manish Kumar; Chettri, Prajwal; Basu, Joysurya; Tripathi, Ajay; Mukherjee, Bratindranath; Tiwari, Archana; Mandal, R. K.. And the article was published in Materials Letters in 2019. Related Products of 13395-16-9 The author mentioned the following in the article:

Intermetallic phases in Au-Cu nanoparticles has been synthesized chem. in liquid phase. The heat-treatment of these nanoparticles at 180°C for 1 h in solution phase led to the formation of Au-Cu alloy nanoparticles with nearly spherical shapes and monodispersed size of ∼10 nm. Subsequent heat-treatment at 300°C for 30 min of these Au-Cu alloy nanoparticles not only revealed structural transformation to intermetallic phases (tetragonal AuCu (tP4) and cubic Cu3Au (cP4)) but also shape change occurs from spherical to rods having average aspect ratio ∼3.0. The structural determination at the particle has been carried out through nano-beam electron diffraction coupled with simulation of electron diffraction patterns and high resolution phase contrast images. These Au-Cu intermetallic nanoparticles exhibit an excellent surface enhanced Raman spectroscopic activity with methylene blue compared to that of Au-Cu alloy nanoparticles. In the experiment, the researchers used many compounds, for example, Bis(acetylacetone)copper(cas: 13395-16-9Related Products of 13395-16-9)

Bis(acetylacetone)copper(cas: 13395-16-9) is used as PVC stabilizer, and curing agents for epoxy resins, acrylic adhesives and silicone rubbers. It is also used as solvents, lubricant additives, paint drier, and pesticides.Related Products of 13395-16-9

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

The author of 《ATRP of methyl acrylate by continuous feeding of activators giving polymers with predictable end-group fidelity》 were Wang, Yu. And the article was published in Polymers (Basel, Switzerland) in 2019. Electric Literature of Br2Cu The author mentioned the following in the article:

Atom transfer radical polymerization (ATRP) of Me acrylate (MA) was carried out by continuous feeding of Cu(I) activators. Typically, the solvent, the monomer, the initiator, and the CuBr2/Me6TREN deactivator are placed in a Schlenk flask (Me6TREN: tris[2-(dimethylamino)ethyl]amine), while the CuBr/Me6TREN activator is placed in a gas-tight syringe and added to the reaction mixture at a constant addition rate by using a syringe pump. As expected, the polymerization started when Cu(I) was added and stopped when the addition was completed, and polymers with a narrow mol. weight distribution were obtained. The polymerization rate could be easily adjusted by changing the activator feeding rate. More importantly, the loss of chain end-groups could be precisely predicted since each loss of Br from the chain end resulted in the irreversible oxidation of one Cu(I) to Cu(II). The Cu(I) added to the reaction system may undergo many oxidation/reduction cycles in ATRP equilibrium, but would finally be oxidized to Cu(II) irreversibly. Thus, the loss of chain end-groups simply equals the total amount of Cu(I) added. This technique provides a neat way to synthesize functional polymers with known end-group fidelity. The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Electric Literature of Br2Cu)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Electric Literature of Br2Cu

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

《Structure and size control of FePtCu nanocatalysts for high performance hydrogen evolution reaction》 was written by Wu, Tianci; Chen, Xu; Wang, Yi; Wang, Hanbin; Liu, Yongzheng; Chang, Jing; Wan, Houzhao; Cheng, Sihan; Wang, Hao. Application In Synthesis of Bis(acetylacetone)copper And the article was included in Sustainable Energy & Fuels in 2020. The article conveys some information:

Pt-based nanostructures with low Pt content are attractive electrocatalysts for high-efficiency hydrogen evolution reaction. It’s a challenge to simultaneously tailor the structure and size of Pt-based alloys in a simple manner and boost their electrocatalytic efficiency. Here, we report the synthesis of high performance Fe45Pt35Cu20 nanoparticles (NPs) with a well-controlled size and crystal structure by a simple organometallic method. Size control of the particles was realized in the range of 8 nm to 27 nm by simply varying the type of Fe precursor, and with the increase of particle size the Fe45Pt35Cu20 alloys exhibited a higher degree of chem. ordering (fct phase, namely L10 structure). The FePtCu nanoparticles showed superior catalytic activity and stability towards the hydrogen evolution reaction with a notably low Tafel slope of 24 mV dec-1 (0.5 M H2SO4) in comparison to com. Pt/C catalysts. The work provides a simple strategy for tailoring the size and crystal phase of Pt based nanostructures to facilitate their promising application in catalytic reactions. In addition to this study using Bis(acetylacetone)copper, there are many other studies that have used Bis(acetylacetone)copper(cas: 13395-16-9Application In Synthesis of Bis(acetylacetone)copper) was used in this study.

Bis(acetylacetone)copper(cas: 13395-16-9) catalyzes coupling and carbene transfer reactions. Metal acetylacetonates are used as catalysts for polymerization of olefins and transesterification. Application In Synthesis of Bis(acetylacetone)copper

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

《Fully oxygen-tolerant atom transfer radical polymerization triggered by sodium pyruvate》 was written by Szczepaniak, Grzegorz; Lagodzinska, Matylda; Dadashi-Silab, Sajjad; Gorczynski, Adam; Matyjaszewski, Krzysztof. SDS of cas: 7789-45-9 And the article was included in Chemical Science in 2020. The article conveys some information:

ATRP (atom transfer radical polymerization) is one of the most robust reversible deactivation radical polymerization (RDRP) systems. However, the limited oxygen tolerance of conventional ATRP impedes its practical use in an ambient atm. In this work, we developed a fully oxygen-tolerant PICAR (photoinduced initiators for continuous activator regeneration) ATRP process occurring in both water and organic solvents in an open reaction vessel. Continuous regeneration of the oxidized form of the copper catalyst with sodium pyruvate through UV excitation allowed the chem. removal of oxygen from the reaction mixture while maintaining a well-controlled polymerization of N-isopropylacrylamide (NIPAM) or Me acrylate (MA) monomers. The polymerizations of NIPAM were conducted with 250 ppm (with respect to the monomer) or lower concentrations of CuBr2 and a tris[2-(dimethylamino)ethyl]amine ligand. The polymers were synthesized to nearly quant. monomer conversions (>99%), high mol. weights (Mn > 270 000), and low dispersities (1.16 < D < 1.44) in less than 30 min under biol. relevant conditions. The reported method provided a well-controlled ATRP (D = 1.16) of MA in DMSO despite oxygen diffusion from the atm. into the reaction system. The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9SDS of cas: 7789-45-9)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.SDS of cas: 7789-45-9

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

Solovyev, Igor; Ono, Ryota; Nikolaev, Sergey published an article in 2021. The article was titled 《Magnetically Induced Polarization in Centrosymmetric Bonds》, and you may find the article in Physical Review Letters.Related Products of 7789-45-9 The information in the text is summarized as follows:

We reveal the microscopic origin of elec. polarization P→ induced by noncollinear magnetic order. We show that in Mott insulators, such P→ is given by all possible combinations of position operators r→j=(r→ij0,r→ij) and transfer integrals tj=(tij0,tij) in the bonds, where r→ij0 and tij0 are spin-independent contributions in the basis of Kramers doublet states, while r→ij and tij stem solely from the spin-orbit interaction. Among them, the combination tij0r→ij, which couples to the spin current, remains finite in the centrosym. bonds, thus yielding finite P→ in the case of noncollinear arrangement of spins. The form of the magnetoelec. coupling, which is controlled by r→ij, appears to be rich and is not limited to the phenomenol. law P→~εijx[eixej] with εij being the bond vector connecting the spins ei and ej. Using d.-functional theory, we illustrate how the proposed mechanism works in the spiral magnets CuCl2, CuBr2, CuO, and α-Li2IrO3, providing a consistent explanation for the available exptl. data.Cupric bromide(cas: 7789-45-9Related Products of 7789-45-9) was used in this study.

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Related Products of 7789-45-9

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

《Architectured ZnO-Cu particles for facile manufacturing of integrated Li-ion electroArchitectured ZnO-Cu particles for facile manufacturing of integrated Li-ion electrodesdes》 was written by Bargardi, Fabio L.; Billaud, Juliette; Villevieille, Claire; Bouville, Florian; Studart, Andre R.. Computed Properties of C10H16CuO4This research focused onzinc oxide copper fabrication lithium ion electrode. The article conveys some information:

Designing electrodes with tailored architecture is an efficient mean to enhance the performance of metal-ion batteries by minimizing electronic and ionic transport limitations and increasing the fraction of active material in the electrode. However, the fabrication of architectured electrodes often involves multiple laborious steps that are not directly scalable to current manufacturing platforms. Here, we propose a processing route in which Cu-coated ZnO powders are directly shaped into architectured electrodes using a simple uniaxial pressing step. Uniaxial pressing leads to a percolating Cu phase with enhanced elec. conductivity between the active ZnO particles and improved mech. stability, thus dispensing the use of carbon-based additives and polymeric binders in the electrode composition The additive-free percolating copper network obtained upon pressing leads to highly loaded integrated anodes displaying volumetric charge capacity 6-10 fold higher than Cu-free ZnO films and that matches the electrochem. performance reported for advanced cathode structures. Achieving this high charge capacity using a readily available pressing tool makes this approach a promising route for the facile manufacturing of high-performance electrodes at large industrial scales. The experimental process involved the reaction of Bis(acetylacetone)copper(cas: 13395-16-9Computed Properties of C10H16CuO4)

Bis(acetylacetone)copper(cas: 13395-16-9) catalyzes coupling and carbene transfer reactions. Metal acetylacetonates are used as catalysts for polymerization of olefins and transesterification. Computed Properties of C10H16CuO4

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