Tag: 200-300

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”

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”

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”