Month: January 2023

Superb electromagnetic shielding polymer nanocomposites filled with 3-dimensional p-phenylenediamine/aniline copolymer nanofibers@copper foam hybrid nanofillers was written by Yao, Feichong;Xie, Wenhao;Ma, Chao;Wang, Dedong;El-Bahy, Zeinhom M.;Helal, Mohamed H.;Liu, Hu;Du, Ai;Guo, Zhanhu;Gu, Hongbo. And the article was included in Composites, Part B: Engineering in 2022.Name: Cuprichydroxide This article mentions the following:

The polymer nanocomposites with 3-dimensional nanofillers can form a 3D network and attain a uniform distribution of nanofillers, which benefits the transfer of charge carriers and phonons as well as the dispersion of stress at a very low loading of nanofillers. These polymer nanocomposites with high mech. properties would have great potential for thermal and elec. conduction as well as electromagnetic interference (EMI) shielding. In this paper, the 3D epoxy nanocomposites are manufactured by stuffing epoxy resin into 3D p-phenylenediamine-aniline copolymer nanofibers@Cu foam (P-PANI@f-Cu) hybrid nanofillers that are constructed by electrophoretic deposition of phosphoric acid doped P-PANI copolymer nanofibers onto the surface of sodium hydroxide oxidized Cu foam. Benefiting from 3D continuous network of P-PANI@f-Cu hybrid nanofillers, the elec. conductivity and thermal conductivity of 3D P-PANI@f-Cu/epoxy nanocomposites with the P-PANI loading of 0.262 wt% could achieve 7.71 ± 0.04 S cm^-1 and 5.4670 ± 0.0085 W m^-1K^-1, resp., which are much better than that of pure epoxy (insulator and 0.2310 ± 0.0017 W m^-1K^-1, resp.) and epoxy composites filled with only Cu foam (4.46 ± 0.03 S cm^-1 and 2.7907 ± 0.0057 W m^-1K^-1, resp.). Meanwhile, with a thickness of 1.8 mm, the average total EMI shielding effectiveness (SE_T) of 3D P-PANI@f-Cu/epoxy nanocomposites in the X-band range reaches a high value of 66.14 dB, which is capable of effectively shielding the electromagnetic signal between Bluetooth earphone and smartphone in the practical application. Furthermore, the 3D P-PANI@f-Cu hybrid nanofillers can efficiently prevent the crack growth in the epoxy nanocomposites and improve their mech. properties including hardness and elastic modulus. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Name: Cuprichydroxide).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Name: Cuprichydroxide

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

Chemically dezincified copper nanowires catalysts with competitive selectivity for ethylene production by carbon dioxide reduction reaction was written by Zhang, Shiji;Zhang, Rui;Yao, Yilin;Zong, Xin;Zhang, Jinqiu;Xiong, Yueping;Yang, Peixia;An, Maozhong. And the article was included in Ionics in 2022.COA of Formula: CuH2O2 This article mentions the following:

Electrochem. reduction of carbon dioxide is an attractive and challenging strategy to solve the problems of renewable energy storage and carbon neutral. However, activity, selectivity, and stability of present developing catalysts for production of C₂H₄ are not as high as required for practical applications. Herein, we report dezincified copper nanowires (pre-CuZn-CuNW) derived from an electrodeposited CuZn alloy by a wet chem. method for electrochem. reduction of carbon dioxide to C₂H₄. Compared with pre-Cu-CuNW (the copper nanowires derived from a bulk Cu), the pre-CuZn-CuNW significantly enhances the catalytic activity and the selectivity for C₂H₄. The partial normalized c.d. of the pre-CuZn-CuNW for production of C₂H₄ increases to 183 mA.cm^-2, which is about twice relative to pre-Cu-CuNW. The faradaic efficiency (FE) of the pre-CuZn-CuNW for C₂H₄ can be maintained over 46% for 24 h during carbon dioxide reduction reaction. The improved catalytic performance can be attributed to the formation of a special nanowire structure with larger electrochem. active surface area and higher intrinsic activity of the pre-CuZn-CuNW during the dealloying process. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2COA of Formula: CuH2O2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. The copper-mediated C-C, C-O, C-N, and C-S bond formation is a part of one oldest reaction, emphasizing the Ullmann cross-coupling reaction.COA of Formula: CuH2O2

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

Characterization, pathogenicity, and fungicide sensitivity of Alternaria isolates associated with preharvest fruit drop in California citrus was written by Camiletti, Boris X.;Lichtemberg, Paulo S. F.;Paredes, Juan A.;Carraro, Thiago A.;Velascos, Jhordan;Michailides, Themis J.. And the article was included in Fungal Biology in 2022.Electric Literature of CuH2O2 This article mentions the following:

Alternaria rot has been recently described as an emerging fungal disease of citrus causing significant damage in California groves. A survey was conducted to determine latent infections on fruits, twigs, and leaves and investigate their seasonal patterns during 2019 and 2020. On fruits, latent infections were more associated with the stem end than with the stylar end, except during spring when a significantly high percentage of flowers (86%) had latent infections. Latent infections on twigs varied markedly between years (28% in 2019 and 9.5% in 2020), while Alternaria spp. were also recovered from citrus leaves. Alternaria isolates collected during the survey were identified based on multigene sequence anal., confirming that Alternaria alternata and Alternaria arborescens are the two species associated with infections of citrus fruits. Of the 23 isolates, 19 were identified as A. alternata and demonstrated the dominance of this species over A. arborescens. Isolates representing populations of these two species were selected as representative isolates for physiol. and morphol. studies. A. alternata and A. arborescens showed similar conidial dimensions but differed in the number of conidia produced. Growth rates demonstrated that A. alternata grows faster than A. arborescens at all the temperatures evaluated, except at 25 and 35°C. The growth patterns were similar for both species. The sporulation rate of the Alternaria isolates was influenced differently by temperature This parameter also influenced conidial germination and appressorium formation, and no significant differences were observed between Alternaria species. Pathogenicity and aggressiveness tests on detached fruit demonstrated the ability of A. alternata and A. arborescens to cause internal lesions and produce fruit drop in the orchards with no quant. differences between them (disease severity indexes of 58 and 68%, resp.). The fungicide sensitivity tests showed that DMI fungicides are the most effective fungicides in reducing mycelial growth. The SDHI fungicides had intermediate activity against the mycelial growth but also suppressed spore germination. The spore germination assay suggested that some of the isolates included in this study might have some level of resistance to QoI and SDHI fungicides. The findings of this study provide new information about the pathogens associated with the excessive fruit drop recently observed in some California citrus groves. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Electric Literature of CuH2O2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Electric Literature of CuH2O2

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

Tuning Topological Spin Textures in Size-Tailored Chiral Magnet Insulator Particles was written by Baral, Priya R.;Ukleev, Victor;LaGrange, Thomas;Cubitt, Robert;Zivkovic, Ivica;Roennow, Henrik M.;White, Jonathan S.;Magrez, Arnaud. And the article was included in Journal of Physical Chemistry C in 2022.SDS of cas: 20427-59-2 This article mentions the following:

Topol. spin textures such as skyrmions hold high potential for use as magnetically active elements in diverse near-future applications. While skyrmions in metallic multilayers attract great attention in this context, unleashing the myriad potential of skyrmions for various applications requires the discovery and customization of alternative host system paradigms. Here, we developed and applied a chem. method to synthesize octahedral particles of the chiral insulating skyrmion host Cu₂OSeO₃ with both narrow size distribution and tailored dimensions approaching the nanoscale. Combining magnetometry and neutron scattering experiments with micromagnetic simulations, we show that the bulk phase diagram of Cu₂OSeO₃ changes dramatically below octahedral heights of 400 nm. Further, particle size-dependent regimes are identified where various topol. spin textures such as skyrmions, merons, and bobbers can stabilize, prior to a lower critical octahedral height of 1̃90 nm below which no topol. spin texture is found stable. These findings suggest conditions under which sparse topol. spin textures confined to chiral magnet nanoparticles can be stable and provide fresh potential for insulator-based application paradigms. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2SDS of cas: 20427-59-2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents has turned up as an exceedingly robust synthetic tool. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.SDS of cas: 20427-59-2

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

Synthesis, structure and hydrogenation properties of Ni-Cu bimetallic nanoparticles was written by Kytsya, A. R.;Bazylyak, L. I.;Zavaliy, I. Yu.;Verbovytskyy, Yu. V.;Zavalij, P.. And the article was included in Applied Nanoscience in 2022.Formula: CuH2O2 This article mentions the following:

Abstract: Bimetallic Ni-Cu nanoparticles with different (Ni/Cu) ratio have been synthesized via fast and simple one-pot reducing Ni(OH)₂/Cu(OH)₂ pulp by hydrazine in water/ethylene glycol solutions Using SEM (SEM), it was found that all obtained nanopowders are polydisperse with the particles sizes within 20-70 nm and the mean diameter of particles slightly depends on the Ni/Cu ratio. Using XRD phase-structural anal., it was found that with increasing Cu amount in the initial mixture from 20 to 50%, the lattice parameter for Ni phase increases from 3.527 to 3.560 Å but the lattice parameter of Cu changes more slightly (3.594 … 3.606 Å). Besides, using precision EDX technique, it was found that obtained nanoparticles may be considered as a core-shell type in which a core consists of copper but a shell consists of a nickel-copper solution Hydrogenation properties of obtained Ni-Cu nanoparticles have been studied, and it has been shown that the initial capacity of Ni-Cu-NPs depends on the sp. surface area and compositions of the samples. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Formula: CuH2O2).

Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Formula: CuH2O2

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