Month: October 2022

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)

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.Electric Literature of Br2Cu

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.

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.Product Details of 13395-16-9

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”

In 2019,Acta Crystallographica, Section C: Structural Chemistry included an article by Moncol, Jan; Mazur, Milan; Valko, Marian; Choi, Jong-Ha. COA of Formula: Br2Cu. The article was titled 《Synthesis, structural characterization, EPR spectroscopy and Hirshfeld surface analysis of a novel Cu2+-doped 3,14-diethyl-2,13-diaza-6,17-diazoniatricyclo[16.4.0.07,12]docosane bis(perchlorate)》. The information in the text is summarized as follows:

Cyclam derivatives and their metal complexes have been found to exhibit an anti-HIV effect and stimulate the activity of stem cells from bone marrow. The strength of their binding to the CXCR4 receptor correlates with anti-HIV and stem-cell activities. Knowledge of the conformation and crystal packing of various macrocyclic metal complexes has become important in developing new effective anti-HIV drugs. The synthesis and preparation of single crystals of a new Cu2+-doped macrocyclic compound, (3,14-diethyl-2,6,13,17-tetraazatricyclo[16.4.0.07,12]docosane)copper(II) bis(perchlorate)-3,14-diethyl-2,13-diaza-6,17-diazoniatricyclo[16.4.0.07,12]docosane bis(perchlorate) (0.69/0.31), {[Cu(C22H44N4)](ClO4)2}0.69·(C22H46N42+·2ClO4-)0.31, is reported. Characterization by X-ray diffraction anal. shows that the asym. unit contains half of a centrosym. mol. The macrocyclic ligand in the compound adopts the most stable trans-III conformation. The Cu-N distances of 2.015 (3) and 2.047 (3) Å are normal, but the long axial Cu-O bond of 2.795 (3) Å may be due to a combination of the Jahn-Teller effect and the strong in-plane ligand field. The crystal structure is stabilized by hydrogen bonding between secondary N-H groups, the N atoms of the macrocycle and the O atoms of the perchlorate anions. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9COA of Formula: 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.COA of Formula: Br2Cu

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

The author of 《Stabilization of dispersed CuPd bimetallic alloy nanoparticles on ZIF-8 for photoreduction of Cr(VI) in aqueous solution》 were Zhang, Yifan; Park, Soo-Jin. And the article was published in Chemical Engineering Journal (Amsterdam, Netherlands) in 2019. COA of Formula: C10H16CuO4 The author mentioned the following in the article:

Nowadays, the Chromium (Cr(VI)) pollution is regarded as a serious threat to both the human health and environment. Therefore, developing an efficient catalyst to remove this pollution is an urgent task. As we know, photocatalytic degradation performance of Cr(VI) is severely hampered owing to its highly recombination efficiency of electrons and holes and lower adsorption activity. In this paper, bimetallic alloy nanoparticles decorated on ZIF-8 were synthesized using a sol-gel method for the photoreduction of Cr(VI) in aqueous solution The CuPd@ZIF-8 catalyst was characterized in terms of sp. surface area, surface morphol., and optical response using X-ray diffraction (XRD) spectrum, Raman spectrum, transmission electron microscopy (TEM), SEM (SEM), XPS, sp. surface area and UV-vis diffuse reflectance (DRS) spectrum. The as-obtained CuPd@ZIF-8 catalyst exhibited excellent photoreduction activity for the reduction of Cr (VI), compared to that of pristine ZIF-8 nanoparticles. Furthermore, the CuPd@ZIF-8 catalyst containing 5 wt% CuPd bimetallic nanoparticles showed the highest photocatalytic activity, where 89% reduction of Cr(VI) (20 ppm) reduction was achieved within 60 min. The as prepared CuPd@ZIF-8 catalyst provided a high sp. surface area and charge transfer rate, which impeded the recombination of the generated electrons and holes. Moreover, the stability of the CuPd@ZIF-8 catalyst was tested and photocatalytic activity was maintained at 90% after four cycles. In addition, the proposed mechanism is explained thoroughly.Bis(acetylacetone)copper(cas: 13395-16-9COA of Formula: C10H16CuO4) 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.COA of Formula: C10H16CuO4

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

《Understanding the Relationship between Catalytic Activity and Termination in photoATRP: Synthesis of Linear and Bottlebrush Polyacrylates》 was written by Martinez, Michael R.; Sobieski, Julian; Lorandi, Francesca; Fantin, Marco; Dadashi-Silab, Sajjad; Xie, Guojun; Olszewski, Mateusz; Pan, Xiangcheng; Ribelli, Thomas G.; Matyjaszewski, Krzysztof. Reference of Cupric bromide And the article was included in Macromolecules (Washington, DC, United States) in 2020. The article conveys some information:

Linear and bottlebrush polyacrylates were prepared by photomediated atom transfer radical polymerization (photoATRP) catalyzed by either CuBr2/TPMA (tris(2-pyridylmethyl)amine) or the more active CuBr2/TPMA*3 (tris([(4-methoxy-2,5-dimethyl)-2-pyridyl] methyl)amine). The latter had a lower rate constant of photoreduction (kred) but unexpectedly enabled faster polymerization Kinetic simulations showed that the equilibrium concentration of a Br-CuII/L deactivator was larger for CuBr2/TPMA*3, resulting in a faster reduction rate (Rred ∝ kred[Br-CuII/L]) and higher radical concentration At the same time, the low [CuI/TPMA*3] counterweighed its high tendency to promote catalyzed radical termination (CRT), and the CRT rate was similar for the two catalytic systems. Kinetic simulations proved that (i) relative reaction rates cannot be predicted by the rate constant alone as exhibited by the relative amount of CuI and CuII species mediated by catalyst activity and termination selectivity and (ii) the polymerization steady state is reached faster with more active catalysts. With this understanding, polyacrylate bottlebrushes were synthesized at moderately high conversion by photoATRP. The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Reference 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.Reference of Cupric bromide

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

Bootharaju, Megalamane S.; Lee, Sanghwa; Deng, Guocheng; Malola, Sami; Baek, Woonhyuk; Haekkinen, Hannu; Zheng, Nanfeng; Hyeon, Taeghwan published their research in Angewandte Chemie, International Edition in 2021. The article was titled 《Ag44(EBT)26(TPP)4 Nanoclusters With Tailored Molecular and Electronic Structure》.Category: copper-catalyst The article contains the following contents:

Although atomically precise metalloid nanoclusters (NCs) of identical size with distinctly different mol. structures are highly desirable to understand the structural effects on the optical and photophys. properties, their synthesis remains highly challenging. Herein, we employed phosphine and thiol capping ligands featuring appropriate steric effects and synthesized a charge-neutral Ag NC with the formula Ag44(EBT)26(TPP)4 (EBT: 2-ethylbenzenethiolate; TPP: triphenylphosphine). The single-crystal X-ray structure reveals that this NC has a hollow metal core of Ag12@Ag20 and a metal-ligand shell of Ag12(EBT)26(TPP)4. The presence of mixed ligands and long V-shaped metal-ligand motifs on this NC has resulted in an enhancement of the NIR-II photoluminescence quantum yield by >25-fold compared to an all-thiolate-stabilized anionic [Ag44(SR)30]4- NC (SR: thiolate). Time-dependent d.-functional calculations show that our Ag44 NC is an 18-electron superatom with a modulated electronic structure as compared to the [Ag44(SR)30]4- anion, significantly influencing its optical properties. After reading the article, we found that the author used Bis(acetylacetone)copper(cas: 13395-16-9Category: copper-catalyst)

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.Category: copper-catalyst

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

Jana, Rajkumar; Datta, Ayan; Malik, Sudip published an article in 2021. The article was titled 《Tuning intermediate adsorption in structurally ordered substituted PdCu3 intermetallic nanoparticles for enhanced ethanol oxidation reaction》, and you may find the article in Chemical Communications (Cambridge, United Kingdom).Category: copper-catalyst The information in the text is summarized as follows:

Co and Ni-substituted structurally ordered intermetallic PdCu3 nanoparticles (NPs) synthesized at low temperature exhibit remarkable enhancement of the ethanol electrooxidation (EOR) activity with improved durability. The first-principle calculations suggest that prompted generation of OH and CH3CO radicals in close proximity and shifting of the d-band center towards the Fermi level boost the EOR efficiency. The experimental part of the paper was very detailed, including the reaction process of Bis(acetylacetone)copper(cas: 13395-16-9Category: copper-catalyst)

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. Category: copper-catalyst

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