Tag: 200-300

Beagan, Abeer M.; Alghamdi, Ahlam A.; Lahmadi, Shatha S.; Halwani, Majed A.; Almeataq, Mohammed S.; Alhazaa, Abdulaziz N.; Alotaibi, Khalid M.; Alswieleh, Abdullah M. published an article in 2021. The article was titled 《Folic acid-terminated poly(2-diethyl amino ethyl methacrylate) brush-gated magnetic mesoporous nanoparticles as a smart drug delivery system》, and you may find the article in Polymers (Basel, Switzerland).Computed Properties of Br2Cu The information in the text is summarized as follows:

Currently, chemotherapy is an important method for the treatment of various cancers. Nevertheless, it has many limitations, such as poor tumor selectivity and multi-drug resistance. It is necessary to improve this treatment method by incorporating a targeted drug delivery system aimed to reduce side effects and drug resistance. The present work aims to develop pH-sensitive nanocarriers containing magnetic mesoporous silica nanoparticles (MMSNs) coated with pH-responsive polymers for tumor-targeted drug delivery via the folate receptor. 2-Diethyl amino Et methacrylate (DEAEMA) was successfully grafted on MMSNs via surface initiated ARGET atom transfer radical polymerization (ATRP), with an average particle size of 180 nm. The end groups of poly (2-(diethylamino)ethyl methacrylate) (PDEAEMA) brushes were converted to amines, followed by a covalent bond with folic acid (FA) as a targeting agent. FA conjugated to the nanoparticle surface was confirmed by XPS. pH-Responsive behavior of PDEAEMA brushes was investigated by Dynamic Light Scattering (DLS). The nanoparticles average diameters ranged from ca. 350 nm in basic media to ca. 650 in acidic solution Multifunctional pH-sensitive magnetic mesoporous nanoparticles were loaded with an anti-cancer drug (Doxorubicin) to investigate their capacity and long-circulation time. In a cumulative release pattern, doxorubicin (DOX) release from nano-systems was ca. 20% when the particle exposed to acidic media, compared to ca. 5% in basic media. The nano-systems have excellent biocompatibility and are minimally toxic when exposed to MCF-7, and -MCF-7 ADR cells. In the experiment, the researchers used many compounds, for example, 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”

In 2019,Macromolecular Rapid Communications included an article by Wang, Jian; Wu, Zhigang; Wang, Guowei; Matyjaszewski, Krzysztof. Safety of Cupric bromide. The article was titled 《In Situ Crosslinking of Nanoparticles in Polymerization-Induced Self-Assembly via ARGET ATRP of Glycidyl Methacrylate》. The information in the text is summarized as follows:

Polymerization-induced self-assembly (PISA) and in situ crosslinking of the formed nanoparticles are successfully realized by activators regenerated by electron-transfer atom transfer radical polymerization (ARGET ATRP) of glycidyl methacrylate (GMA) or a mixture of GMA/benzyl methacrylate (BnMA) monomers in ethanol. Poly(oligo(ethylene oxide) Me ether methacrylate) was employed as macroinitiator/stabilizer, and a cupric bromide/tris(pyridin-2-ylmethyl)amine complex as catalyst. Tin(2-ethylhexanoate) was used as reducing agent for ARGET ATRP, and simultaneously acted as a catalyst for ring-opening polymerization of oxirane ring in GMA. The kinetics shows that the double bond in GMA was completely polymerized in 4.0 h, while only a 33% conversion of oxirane ring in GMA was reached at 117.0 h. Such a large difference would guarantee a smooth PISA and a subsequent in situ crosslinking of formed nanoparticles. The transmission electron microscopy and dynamic light scattering show spherical nanoparticles formed. With a feed molar ratio [BnMA]0/[GMA]0 = 150/50, 100/100, and 50/150, the nanoparticles formed in ethanol can dissociate or swell in toluene. When pure GMA was used, the solid nanoparticles were observed in toluene or ethanol. The ARGET ATRP provides an efficient strategy to stabilize the nanoparticles formed in the PISA of GMA-containing system. 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”

Reference of Cupric bromideIn 2022 ,《Quantum Spin-1/2 Dimers in a Low-Dimensional Tetrabromocuprate Magnet》 appeared in Chemistry – A European Journal. The author of the article were Sampson, Gavin; Bristowe, Nicholas C.; Carr, Sam T.; Saib, Asad; Stenning, Gavin B. G.; Clark, Ewan R.; Saines, Paul J.. The article conveys some information:

This work describes a homometallic spin-1/2 tetrabromocuprate adopting a bilayer structure. Magnetic-susceptibility measurements show a broad maximum centered near 70 K, with fits to this data using a Heisenberg model consistent with strong antiferromagnetic coupling between neighboring copper atoms in different layers of the bilayer. There are further weak intralayer ferromagnetic interactions between copper cations in neighboring dimers. First-principles calculations are consistent with this, but suggest there is only significant magnetic coupling within one direction of a layer; this would suggest the presence of a spin ladder within the bilayer with antiferromagnetic rung and weaker ferromagnetic rail couplings. In the experiment, the researchers used 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”

In 2022,Mosaferi, M.; Selles, P.; Miteva, T.; Ferte, A.; Carniato, S. published an article in Journal of Physical Chemistry A. The title of the article was 《Interpretation of Shakeup Mechanisms in Copper L-Shell Photoelectron Spectra》.Recommanded Product: Bis(acetylacetone)copper The author mentioned the following in the article:

We report on an original full ab initio quantum mol. approach designed to simulate Cu 2p X-ray photoelectron spectra. The description includes electronic relaxation/correlation and spin-orbit coupling effects and is implemented within nonorthogonal sets of MOs for the initial and final states. The underlying mechanism structuring the Cu 2p photoelectron spectra is clarified thanks to a correlation diagram applied to the CuO4C6H6 paradigm. This diagram illustrates how the energy drop of the Cu 3d levels following the creation of the Cu 2p core hole switches the nature of the highest singly occupied MO (H-SOMO) from dominant metal to dominant ligand character. It also reveals how the repositioning of the Cu 3d levels induces the formation of new bonding and antibonding orbitals from which shakeup mechanisms toward the relaxed H-SOMO operate. The specific nature, ligand → ligand and metal → ligand, of these excitations building the satellite lines is exposed. Our approach finally applied to the real Cu(acac)2 system clearly demonstrates how a definite interpretation of the XPS spectra can be obtained when a correct evaluation of binding energies, intensities, and relative widths of the spectral lines is achieved. After reading the article, we found that the author used Bis(acetylacetone)copper(cas: 13395-16-9Recommanded Product: Bis(acetylacetone)copper)

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: Bis(acetylacetone)copper

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

Qi, Shaopeng; Liu, Guoning; Chen, Jinxi; Lou, Yongbing; Zhao, Yixin published an article in 2021. The article was titled 《Surface Coordination Layer to Enhance the Stability of Plasmonic Cu Nanoparticles》, and you may find the article in Journal of Physical Chemistry C.Formula: C10H16CuO4 The information in the text is summarized as follows:

The fast oxidation of plasmonic Cu nanomaterials caused by surface-absorbed oxygen has been a serious problem and has hindered their applications in many aspects. Herein, a lollipop-shaped Cu@Cu2O/ZnO heterojunction with a core-shell head and a rodlike stem was successfully prepared using the colloidal chem. method, which exhibits ultralong-term stability against air oxidation in hexane. The enhanced stability of Cu@Cu2O/ZnO was due to the presence of zinc acetate, which resulted in the crystal face reconstruction of Cu@Cu2O and the formation of a thin surface carboxylate coordination layer on the partial surface of Cu@Cu2O. The passivation layer effectively hindered the absorption of surface oxygen, thus reducing the oxidation rate of Cu. Our current work was expected to provide new insights into the protection of active metal nanostructures. After reading the article, we found that the author used Bis(acetylacetone)copper(cas: 13395-16-9Formula: C10H16CuO4)

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.Formula: C10H16CuO4

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

《Lead-free two-dimensional (R-NH3)2MX4 inorganic-organic hybrids: solid-solid phase transitions and broadband emission》 was published in Journal of Physics D: Applied Physics in 2020. These research results belong to Bochalya, Madhu; Kumar, Sunil. Application In Synthesis of Cupric bromide The article mentions the following:

Among the large family of two-dimensional inorganic-organic hybrid material systems, the lead-free ones are significantly important due to their nontoxicity and suitability in energy storage devices, heat management in electronics, optoelectronics, light-emitting and memory devices, low-temperature magnetic refrigeration, and other applications. Thermal stability, solid-solid phase transitions and light emission properties of solution-processed copper- and manganese-based (R-NH3)2MX4 hybrids are reported here. Manganese chloride and long carbon chain-based systems are found to be highly stable as compared to the others. Thermally stable up to temperatures beyond 240 °C, these systems are seen to exhibit multiple solid-solid phase transitions in the temperature range of 30 °C-100 °C. The nature of the phase transitions depends on the length and the conformation of the organic chain, and the metal-halogen network present in them. Owing to the phase-change temperatures being near the room temperature as well as the high-value enthalpy and entropy changes, (C12H25NH3)2MnCl4 is more appropriate for energy storage and release applications. Also, these systems exhibit broadband light emission under ambient conditions to provide a low-cost route to white light-emitting devices. The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Application In Synthesis 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.Application In Synthesis of Cupric bromide

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

Category: copper-catalystIn 2022 ,《Polymer Grafted Nanoparticle Composites with Enhanced Thermal and Mechanical Properties》 appeared in ACS Applied Materials & Interfaces. The author of the article were Kubiak, Joshua M.; Li, Buxuan; Suazo, Mathew; Macfarlane, Robert J.. The article conveys some information:

The distribution of filler particles within a polymer matrix nanocomposite has a profound influence on the properties and processability of the material. While filler aggregation and percolation can significantly enhance particular functionalities such as thermal and elec. conductivity, the formation of larger filler clusters and networks can also impair mech. properties like strength and toughness and can also increase the difficulty of processing. Here, a strategy is presented for the preparation of functional composites that enhance thermal conductivity over polymer alone, without neg. affecting mech. performance or processability. Thermal crosslinking of self-suspended polymer grafted nanoparticles is used to prepare highly filled (>50 volume %) macroscopic nanocomposites with homogeneously dispersed, non-percolating alumina particles in an organic matrix. The initial composites use low glass transition temperature polymer grafts and thus are flexible and easily shaped by thermoforming methods. However, after thermal aging, the resulting materials display high stiffness (>10 GPa) and enhanced thermal conductivity (>100% increase) and also possess mech. strength similar to commodity plastics. Moreover, the covalent bonding between matrix and filler allows for the significant elevation of thermal conductivity despite the extensive interfacial area in the nanocomposite. The thermal aging of polymer grafted nanoparticles is therefore a promising method for producing easily processable, mech. sturdy, and macroscopic nanocomposites with improved thermal conductivity The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9Category: copper-catalyst)

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.Category: copper-catalyst

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

Guo, Xueyi; Liu, Sheng; Wang, Weijia; Zhu, Congtan; Li, Chongyao; Yang, Ying; Tian, Qinghua; Liu, Yong published their research in Journal of Colloid and Interface Science in 2021. The article was titled 《Enhanced photocatalytic hydrogen production activity of Janus Cu1.94S-ZnS spherical nanoheterostructures》.HPLC of Formula: 13395-16-9 The article contains the following contents:

Photocatalytic hydrogen evolution is one of the most promising approaches for efficient solar energy conversion. The light-harvesting ability and interfacial structure of heterostructured catalysts regulate the processes of photon injection and transfer, which further determines their photocatalytic performances. Here, we report a Janus Cu1.94S-ZnS nano-heterostructured photocatalyst synthesized using a facile stoichiometrically limited cation exchange reaction. Djurleite Cu1.94S and wurtzite ZnS share the anion skeleton, and the lattice mismatch between immiscible domains is ∼1.7%. Attributing to the high-quality interfacial structure, Janus Cu1.94S-ZnS nanoheterostructures (NHs) show an enhanced photocatalytic hydrogen evolution rate of up to 0.918 mmol h-1 g-1 under full-spectrum irradiation, which is ∼38-fold and 17-fold more than those of sole Cu1.94S and ZnS nanocrystals (NCs), resp. The results indicate that cation exchange reaction is an efficient approach to construct well-ordered interfaces in hybrid photocatalysts, and it also demonstrates that reducing lattice mismatch and interfacial defects in hybrid photocatalysts is essential for enhancing their solar energy conversion performance. In the part of experimental materials, we found many familiar compounds, such as Bis(acetylacetone)copper(cas: 13395-16-9HPLC of Formula: 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. HPLC of Formula: 13395-16-9

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

《Copper Isolated Sites on N-Doped Carbon Nanoframes for Efficient Oxygen Reduction》 was written by Huang, Cong; Zheng, Lirong; Feng, Wenshuai; Guo, Aimin; Gao, Xiaohui; Long, Zhen; Qiu, Xiaoqing. COA of Formula: C10H16CuO4 And the article was included in ACS Sustainable Chemistry & Engineering in 2020. The article conveys some information:

In recent years, metal isolated site catalysts with the high exposure and maximized availability of metal species provide a new route to boost the oxygen reduction performance. However, in the absence of clusters and nanoparticles, the synthesis of this catalyst with metal high-loading, especially for copper, is still a big challenge. In this work, a metal isolated site catalyst with high copper content (1.12 wt %), copper isolated sites anchored on N-doped carbon materials (donated as Cu ISs/NC-1000), was prepared by the pyrolysis of copper acetylacetone within the metal-organic framework (ZIF-8) at 1000°C. The successful preparation of products can be demonstrated by high-angle annular dark-field scanning transmission electron microscopy and X-ray absorption spectra. With the merits of the atomically dispersed surface metal atoms and abundant ORR-favored copper active sites, the present Cu ISs/NC-1000 exhibits an excellent ORR electrochem. activity with a half-wave potential of 0.855 V (vs RHE) and a limiting c.d. of 5.2 mA cm-2 in the electrochem. tests, superior to the results from com. Pt/C and previously reported Cu-based materials. For the durability, the negligible activity decay after 10,000 continuous potential cycles and good resistance to methanol crossover can be noted. The outstanding catalytic activity from the present Cu ISs/NC-1000 demonstrates the superiority of metal isolated sites as electrocatalytic centers. The excellent ORR activity of Cu ISs/NC catalysts in this work promotes the development of clean and sustainable energy devices. In the part of experimental materials, we found many familiar compounds, such as Bis(acetylacetone)copper(cas: 13395-16-9COA of Formula: 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. COA of Formula: C10H16CuO4

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

In 2019,Russian Journal of General Chemistry included an article by Makhaev, V. D.; Petrova, L. A.; Shulga, Yu. M.. Application of 13395-16-9. The article was titled 《Mechanically Activated Solid-Phase Reaction of Copper(I) Chloride with Sodium β-Diketonates: Formation of Metallic Copper Nanoparticles》. The information in the text is summarized as follows:

Solid-phase reaction of copper(I) chloride with sodium β-diketonates under mech. activation in a vibration ball mill involves disproportionation of CuCl with the formation of the corresponding copper(II) β-diketonate and highly reactive X-ray amorphous metallic copper nanoparticles. The effect of reaction conditions on the process and some properties of the activated mixtures have been studied. In the experiment, the researchers used Bis(acetylacetone)copper(cas: 13395-16-9Application 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.Application of 13395-16-9

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