Month: October 2022

Application of 13395-16-9In 2019 ,《Direct synthesis of multiplexed metal-nanowire-based devices by using carbon nanotubes as vector templates》 was published in Angewandte Chemie, International Edition. The article was written by Clement, Pierrick; Xu, Xinzhao; Stoppiello, Craig T.; Rance, Graham A.; Attanzio, Antonio; O’Shea, James N.; Temperton, Robert H.; Khlobystov, Andrei N.; Lovelock, Kevin R. J.; Seymour, Jake M.; Fogarty, Richard M.; Baker, Alastair; Bourne, Richard A.; Hall, Brendan; Chamberlain, Thomas W.; Palma, Matteo. The article contains the following contents:

We present the synthesis of metal nanowires in a multiplexed device configuration using single-walled carbon nanotubes (SWNTs) as nanoscale vector templates. The SWNT templates control the dimensionality of the wires, allowing precise control of their size, shape, and orientation; moreover, a solution-processable approach enables their linear deposition between specific electrode pairs in electronic devices. Elec. characterization demonstrated the successful fabrication of metal nanowire electronic devices, while multiscale characterization of the different fabrication steps revealed details of the structure and charge transfer between the material encapsulated and the carbon nanotube. Overall the strategy presented allows facile, low-cost, and direct synthesis of multiplexed metal nanowire devices for nanoelectronic applications. The experimental process involved the reaction of Bis(acetylacetone)copper(cas: 13395-16-9Application of 13395-16-9)

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 of 13395-16-9

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

《Remarkable reversal of 13C-NMR assignment in d1, d2 compared to d8, d9 acetylacetonate complexes: analysis and explanation based on solid-state MAS NMR and computations》 was written by Andersen, Anders B. A.; Pyykkonen, Ari; Jensen, Hans Joergen Aa.; McKee, Vickie; Vaara, Juha; Nielsen, Ulla Gro. Safety of Bis(acetylacetone)copperThis research focused ontransition metal acetylacetonate complex NMR; optimized mol structure transition metal acetylacetonate complex; crystal structure transition metal acetylacetonate complex. The article conveys some information:

13C solid-state MAS NMR spectra of a series of paramagnetic metal acetylacetonate complexes; [VO(acac)2] (d1, S = 1/2), [V(acac)3] (d2, S = 1), [Co(acac)3], [Ni(acac)2(H2O)2] (d8, S = 1), and [Cu(acac)2] (d9, S = 1/2), were assigned using modern NMR shielding calculations This provided a reliable assignment of the chem. shifts and a qual. insight into the hyperfine couplings. Our results show a reversal of the isotropic 13C shifts, δiso(13C), for CH3 and CO between the d1 and d2vs. the d8 and d9 acetylacetonate complexes. The CH3 shifts change from about -150 ppm (d1,2) to roughly 1000 ppm (d8,9), whereas the CO shifts decrease from 800 ppm to about 150 ppm for d1,2 and d8,9, resp. This was rationalized by comparison of total spin-d. plots and computed contact couplings to those corresponding to singly occupied MOs (SOMOs). This revealed the interplay between spin delocalization of the SOMOs and spin polarization of the lower-energy MOs, influenced by both the mol. symmetry and the d-electron configuration. A large pos. chem. shift results from spin delocalization and spin polarization acting in the same direction, whereas their cancellation corresponds to a small shift. The SOMO(s) for the d8 and d9 complexes are σ-like, implying spin-delocalization on the CH3 and CO groups of the acac ligand, canceled only for CO by spin polarization. In contrast, the SOMOs of the d1 and d2 systems are π-like and a large CO-shift results from spin polarization, which accounts for the reversed assignment of δiso(13C) for CH3 and CO. The experimental process involved the reaction of Bis(acetylacetone)copper(cas: 13395-16-9Safety of Bis(acetylacetone)copper)

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. Safety of Bis(acetylacetone)copper

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

The author of 《Impact of Organometallic Intermediates on Copper-Catalyzed Atom Transfer Radical Polymerization》 were Fantin, Marco; Lorandi, Francesca; Ribelli, Thomas G.; Szczepaniak, Grzegorz; Enciso, Alan E.; Fliedel, Christophe; Thevenin, Lucas; Isse, Abdirisak A.; Poli, Rinaldo; Matyjaszewski, Krzysztof. And the article was published in Macromolecules (Washington, DC, United States) in 2019. HPLC of Formula: 7789-45-9 The author mentioned the following in the article:

In atom transfer radical polymerization (ATRP), radicals (R•) can react with CuI/L catalysts forming organometallic complexes, R-CuII/L (L = N-based ligand). R-CuII/L favors addnl. catalyzed radical termination (CRT) pathways, which should be understood and harnessed to tune the polymerization outcome. Therefore, the preparation of precise polymer architectures by ATRP depends on the stability and on the role of R-CuII/L intermediates. Herein, spectroscopic and electrochem. techniques were used to quantify the thermodn. and kinetic parameters of the interactions between radicals and Cu catalysts. The effects of radical structure, catalyst structure and solvent nature were investigated. The stability of R-CuII/L depends on the radical-stabilizing group in the following order: cyano > ester > Ph. Primary radicals form the most stable R-CuII/L species. Overall, the stability of R-CuII/L does not significantly depend on the electronic properties of the ligand, contrary to the ATRP activity. Under typical ATRP conditions, the R-CuII/L build-up and the CRT contribution may be suppressed by using more ATRP-active catalysts or solvents that promote a higher ATRP activity.Cupric bromide(cas: 7789-45-9HPLC of Formula: 7789-45-9) was used in this study.

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.HPLC of Formula: 7789-45-9

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

Sun, Mingkang; Lorandi, Francesca; Yuan, Rui; Dadashi-Silab, Sajjad; Kowalewski, Tomasz; Matyjaszewski, Krzysztof published an article in 2021. The article was titled 《Assemblies of polyacrylonitrile-derived photoactive polymers as blue and green light photo-cocatalysts for Cu-catalyzed ATRP in water and organic solvents》, and you may find the article in Frontiers in Chemistry (Lausanne, Switzerland).Safety of Cupric bromide The information in the text is summarized as follows:

Photoluminescent nanosized quasi-spherical polymeric assemblies prepared by the hydrothermal reaction of polyacrylonitrile (PAN), ht-PLPPAN, were demonstrated to have the ability to photo-induce atom transfer radical polymerization (ATRP) catalyzed by low, ppm concentrations of CuII complex with tris(2-pyridylmethyl)amine (TPMA). Such photo induced ATRP reactions of acrylate and methacrylate monomers were performed in water or organic solvents, using ht-PLPPAN as the photo-cocatalyst under blue or green light irradiation Mechanistic studies indicate that ht-PLPPAN helps to sustain the polymerization by facilitating the activation of alkyl bromide species by two modes: (1) green or blue light-driven photoreduction of the CuII catalyst to the activating CuI form, and (2) direct activation of dormant alkyl bromide species which occurs only under blue light. The photoreduction of the CuII complex by ht-PLPPAN was confirmed by linear sweep voltammetry performed under illumination. Anal. of the polymerization kinetics in aqueous media indicated even though CuI complexes comprised only 1-1.4% of all Cu species at equilibrium, they exhibited high activation rate constant and activated the alkyl bromide initiators five to six orders of magnitude faster than ht-PLPPAN. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9Safety 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.Safety of Cupric bromide

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

《Atom Transfer Radical Polymerization Driven by Near-Infrared Light with Recyclable Upconversion Nanoparticles》 was written by Zhang, Wenjie; He, Jianhao; Lv, Chunna; Wang, Qianyi; Pang, Xinchang; Matyjaszewski, Krzysztof; Pan, Xiangcheng. Product Details of 7789-45-9This research focused onupconversion nanoparticle photo ATRP methacrylate acrylate. The article conveys some information:

Near-IR (NIR) photoinduced chem. processes are highly attractive for specific applications owing to the deep penetration of NIR into the nontransparent materials including biol. and synthetic materials. Robust NIR photoinduced atom transfer radical polymerization (photoATRP) was achieved using upconversion nanoparticles (UCNPs) as an internal light converter to turn a 980 nm NIR light to the wavelength of UV/vislight. This NIR photoATRP was capable of polymerizing both hydrophobic and hydrophilic monomers at a low loading of ppm concentrations of the CuBr2/tris(2-pyridylmethyl)amine catalyst under the irradiation of a 980 nm NIR light (4 W/cm2) and UCNPs with reusable performance, providing well-defined polymers with predetermined mol. weight, low dispersity, and excellent chain-end fidelity. The switching of light “”on/off”” showed an excellent temporal control of the polymerization The NIR photoATRP exhibited excellent penetrations through several visible light-proof barriers using NIR light, and it may provide future directions of photopolymerization in nontransparent systems, especially biol. systems containing photosensitive moieties. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Product Details of 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.Product Details of 7789-45-9

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

Recommanded Product: 13395-16-9In 2022 ,《Performance of a C-containing Cu-based photocatalyst for the degradation of tartrazine: Comparison of performance in a slurry and CPC photoreactor under artificial and natural solar light》 was published in Journal of Colloid and Interface Science. The article was written by Munoz-Flores, Paula; Poon, Po S.; Ania, Conchi O.; Matos, Juan. The article contains the following contents:

A carbon-containing Cu-based material (Cu@C) was used as photocatalyst for the degradation of a commonly food-industry azo-dye (tartrazine, also called Y5), under solar light at laboratory and pilot scale photoreactors. Important performance parameters such as dark adsorption capacity, catalyst’s loading and initial concentration of the dye were first optimized in a slurry photoreactor at laboratory scale under artificial solar light following the kinetics of degradation of the dye. Afterwards, the photocatalytic activity was investigated at pilot scale in a compound parabolic collector (CPC) photoreactor operating for 10 h of irradiation The degradation of tartrazine is among the highest values reported for alternative metal oxide semiconductors, in both photoreactor configurations. Catalytic data revealed a 3 times faster degradation kinetics of tartrazine in the CPC photoreactor under natural solar light than in the slurry reactor under artificial solar light. This behavior indicates that a moderate photon flux in the CPC is more adequate to operate with the prepared photocatalyst, as it minimizes the recombination of charge carriers in the catalyst. This is important, since most of the photocatalytic tests designed to evaluate the activity of novel materials are frequently carried out under simulated solar light and disregard the impact of photon flux in outdoor conditions. In addition to this study using Bis(acetylacetone)copper, there are many other studies that have used Bis(acetylacetone)copper(cas: 13395-16-9Recommanded Product: 13395-16-9) was used in this study.

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.Recommanded Product: 13395-16-9

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

In 2019,Chemical Communications (Cambridge, United Kingdom) included an article by Cao, Dong; Cheng, Daojian. Quality Control of Bis(acetylacetone)copper. The article was titled 《One-pot synthesis of copper-nickel sulfide nanowires for overall water splitting in alkaline media》. The information in the text is summarized as follows:

Herein, one dimensional copper-nickel sulfide nanowires (NWs) were, for the first time, synthesized by using an accurate one-pot multi-step wet chem. strategy. The obtained copper-nickel sulfide NW electrocatalysts exhibit superb performance for both the hydrogen evolution reaction and oxygen evolution reaction, which is mainly due to the active centers Cu2S, NiS and Ni3S2. In the part of experimental materials, we found many familiar compounds, such as Bis(acetylacetone)copper(cas: 13395-16-9Quality Control of Bis(acetylacetone)copper)

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. Quality Control of Bis(acetylacetone)copper

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

《Metal-free ATRP catalyzed by visible light in continuous flow》 was written by El Achi, Nassim; Bakkour, Youssef; Adhami, Wissal; Molina, Julien; Penhoat, Mael; Azaroual, Nathalie; Chausset-Boissarie, Laetitia; Rolando, Christian. Recommanded Product: 7789-45-9 And the article was included in Frontiers in Chemistry (Lausanne, Switzerland) in 2020. The article conveys some information:

ATRP of Me methacrylate catalyzed by Eosin Y, an inexpensive and an environmental benign dye, was performed in a continuous flow reactor made of FEP tubing and irradiated by visible light green LEDs. The reaction under flow conditions was significantly more rapid and controlled compared to that in batch giving 90% of polymerization after only 3 h of irradiation The formed polymers in flow have Mn measured by GPC and DOSY NMR in accordance with the theor. values and show low dispersities (ETH < 1.5). The livingness of the polymers has been confirmed by LED on and LED off experiments and by the synthesis of block copolymers. The protocol described herein serves as a ""proof of concept"" of using Eosin Y as a photocatalyst for controlled polymerization and of using 1D and 2D NMR for polymer characterization. The protocol could be replicated in the future for other reversible-deactivation radical polymerizations The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9Recommanded Product: 7789-45-9)

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.Recommanded Product: 7789-45-9

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

Dadashi-Silab, Sajjad; Lorandi, Francesca; DiTucci, Matthew J.; Sun, Mingkang; Szczepaniak, Grzegorz; Liu, Tong; Matyjaszewski, Krzysztof published their research in Journal of the American Chemical Society in 2021. The article was titled 《Conjugated Cross-linked Phenothiazines as Green or Red Light Heterogeneous Photocatalysts for Copper-Catalyzed Atom Transfer Radical Polymerization》.Recommanded Product: 7789-45-9 The article contains the following contents:

Using the power of light to drive controlled radical polymerizations has provided significant advances in synthesis of well-defined polymers. Photoinduced atom transfer radical polymerization (ATRP) systems often employ UV light to regenerate copper activator species to mediate the polymerization Taking full advantage of long-wavelength visible light for ATRP would require developing appropriate photocatalytic systems that engage in photoinduced electron transfer processes with the ATRP components to generate activating species. Herein, we developed conjugated microporous polymers (CMP) as heterogeneous photocatalysts to exploit the power of visible light in promoting copper-catalyzed ATRP. The photocatalyst was designed by crosslinking phenothiazine (PTZ) as a photoactive core in the presence of dimethoxybenzene as a crosslinker via the Friedel-Crafts reaction. The resulting PTZ-CMP network showed photoactivity in the visible region due to the extended conjugation throughout the network because of the aromatic groups connecting the PTZ units. Therefore, photoinduced copper-catalyzed ATRP was performed with CMPs that regenerated activator species under green or red light irradiation to start the ATRP process. This resulted in efficient polymerization of acrylate and methacrylate monomers with high conversion and well-controlled mol. weight The heterogeneous nature of the photocatalyst enabled easy separation and efficient reusability in subsequent polymerizations The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Recommanded Product: 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.Recommanded Product: 7789-45-9

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

Computed Properties of Br2CuIn 2019 ,《Controlled Synthesis of Polymers on the Basis of Stearyl Methacrylate and Their Use as Depressor Additives》 was published in Polymer Science, Series B: Polymer Chemistry. The article was written by Simanskaya, K. Yu.; Grishin, I. D.; Pavlovskaya, M. V.; Grishin, D. F.. The article contains the following contents:

The controlled synthesis of poly(stearyl methacrylate) and stearyl methacrylate-acrylonitrile copolymers is conducted using a catalytic system consisting of copper(I) bromide, tris[(2-pyridyl)methyl]amine as a ligand, and isopropylamine as an activating agent. Effects of activator concentration and monomer mixture composition on the mol.-weight characteristics of the (co)polymers are estimated It is shown that the products of synthesis may be used as depressor additives lowering the cloud point, pour point, and cold filter plugging point of diesel fuel. The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9Computed Properties of Br2Cu)

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.Computed Properties of Br2Cu

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