Day: October 13, 2022

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.

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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)

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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)

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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)

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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”

Product Details of 13395-16-9In 2021 ,《Comparative study of the thermal behavior of Sr-Cu-O gels obtained by sol-gel and microwave-assisted sol-gel method》 was published in Journal of Thermal Analysis and Calorimetry. The article was written by Predoana, Luminita; Atkinson, Irina; Karaj, Daniel Attila; Odhiambo, Vincent Otieno; Bakos, Laszlo Peter; Nagyne Kovacs, Teodora; Pandele-Cusu, Jeanina; Petrescu, Simona; Rusu, Adriana; Szilagyi, Imre M.; Pokol, Gyorgy; Zaharescu, Maria. The article contains the following contents:

In the present paper, the thermal behavior of Sr-Cu-O gels obtained by sol-gel (SG) or microwave (MW)-assisted SG methods was studied in order to establish the appropriate thermal conditions for pure nanostructured SrCu2O2 preparation As reagents, copper and strontium acetylacetonate in alc. media were used. The starting solutions were homogenized either by stirring for 2 h at room temperature or were exposed to MW for 5 min at 300 W and a frequency of 2.45 GHz. Both solutions were left to gel at room temperature The obtained gels were investigated by SEM, Fourier-transform IR spectroscopy, as well as by thermal anal. combined with evolved gas anal. (TG/DTA-MS) measurements in air, inert and reducing atmospheres. For both type of samples, a stepwise thermal decomposition of the gels was noticed in a large temperature range. In the case of samples obtained by microwave-assisted SG method, a higher number of thermal effects were registered assigned to a higher number of mol. species formed in the sample. The residues obtained by non-isothermal treatment up to 900°C, of both type of samples, were investigated by X-ray diffraction. The results demonstrate the influence of the MW on the SG synthesis and on the thermal properties of the resulted gels. Based on the obtained results, the required thermal treatment of the gels in order to obtain convenient precursors powders for obtaining pure SrCu2O2 could be proposed. The experimental part of the paper was very detailed, including the reaction process of Bis(acetylacetone)copper(cas: 13395-16-9Product Details 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. Product Details of 13395-16-9

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

Electric Literature of Br2CuIn 2020 ,《Surface-Initiated Passing-through Zwitterionic Polymer Brushes for Salt-Selective and Antifouling Materials》 was published in Macromolecules (Washington, DC, United States). The article was written by Vy, Ngoc Chau H.; Liyanage, Chinthani D.; Williams, Robert M. L.; Fang, Justin M.; Kerns, Peter M.; Schniepp, Hannes C.; Adamson, Douglas H.. The article contains the following contents:

The use of the traditional growing-from approach to prepare surface-initiated polymer brushes is widespread as it produces polymer brushes with higher grafting densities than grafting-to methods. In this article, we present an investigation of a passing-though approach that supplies the monomer from below the initiator-functionalized surface, inverting the concentration gradient found in the traditional growing-from technique that has been shown to increase the D of brushes. Using Fourier transform IR (FTIR) spectroscopy mapping combined with substrate masking, we show that the brushes incorporate only monomer diffusing from below and not from the surrounding solution Further, we characterize these brushes with contact angle anal., FTIR, and at. force microscopy and compare them to brushes synthesized by the traditional growing-from approach. Finally, we demonstrate that several properties of the zwitterionic polymer brush prepared by our passing-through method, for example, wettability, grafting d., uniformity, salt permeation retardation, and fouling resistance, are superior to those of brushes prepared by the growing-from technique. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9Electric Literature of Br2Cu)

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

《Mitochondria-targeting NO gas nanogenerator for augmenting mild photothermal therapy in the NIR-II biowindow》 was published in Chemical Communications (Cambridge, United Kingdom) in 2020. These research results belong to Wu, Canchen; Wang, Danqi; Cen, Moupan; Cao, Leyu; Ding, Yue; Wang, Jin; Yuan, Xiaolei; Wang, Yang; Chen, Tingting; Yao, Yong. Product Details of 13395-16-9 The article mentions the following:

An intelligent nitric oxide gas-releasing nanoplatform based on CuS-nanoplates has been designed to overcome the heat endurance of tumor cells by the inhibition of HSP90 expression with the released NO gas in mitochondria and thereby realize enhanced PTT under mild temperature conditions.Bis(acetylacetone)copper(cas: 13395-16-9Product Details of 13395-16-9) was used in this study.

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

Gresham, Isaac J.; Humphreys, Ben A.; Willott, Joshua D.; Johnson, Edwin C.; Murdoch, Timothy J.; Webber, Grant B.; Wanless, Erica J.; Nelson, Andrew R. J.; Prescott, Stuart W. published an article in 2021. The article was titled 《Geometrical Confinement Modulates the Thermoresponse of a Poly(N-isopropylacrylamide) Brush》, and you may find the article in Macromolecules (Washington, DC, United States).Related Products of 7789-45-9 The information in the text is summarized as follows:

The structure of grafted-from poly(N-isopropylacrylamide) (PNIPAM) brushes is investigated as a function of confining stress and system temperature using neutron reflectometry (NR), numerical SCF theory, and the reanal. of colloid probe at. force microscopy (AFM) data from the literature. For NR experiments, confinement is achieved using a custom-made sample environment, and the corresponding reflectometry data are analyzed using a novel “”distribution model.”” The NR and AFM experiments probe similar temperature-stress combinations and generally find qual. agreement, with some variations highlighting path-dependent (isostress vs. isothermal, resp.) behavior. All techniques indicate that confinement removes the critical transition point in the thermoresponse of PNIPAM and results in the brush assuming a block-like volume fraction profile with a uniform internal structure. The PNIPAM brushes recover from such treatment, regaining their thermoresponse upon resolvation. Understanding the structure of responsive polymer brushes under confinement is essential, as brush applications are often accompanied by a surface-normal force (i.e., lubrication) and brush properties are dependent on their structure. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Related Products of 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.Related Products of 7789-45-9

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

In 2019,Chemical Engineering Journal (Amsterdam, Netherlands) included an article by Tang, Zengmin; Kim, Woo-Sik; Yu, Taekyung. Safety of Cupric bromide. The article was titled 《Studies on morphology changes of copper sulfide nanoparticles in a continuous Couette-Taylor reactor》. The information in the text is summarized as follows:

In this report, a Couette-Taylor (CT) reactor was applied as an effective continuous process for synthesizing copper sulfide nanoparticles. The rotational speed, mean residence time (MRT), and concentration of the feed solution were important control factors on the morphol. and size control of the nanoparticles. Increasing the rotational speed from 80 rpm to 90 rpm changed the morphol. of the synthesized nanoparticles from nanofibers to hexagonal nanoplates. Only Cu7S4 nanofibers were obtained in the batch reactor. Through various comparative experiments, we found that MRT and the feed solution concentration affect monomer concentration in the CT reactor, thus controlling the morphol. and size of the nanoparticles. The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9Safety of Cupric bromide)

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.Safety of Cupric bromide

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