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Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. HPLC of Formula: C10H16CuO4. Introducing a new discovery about 13395-16-9, Name is Bis(acetylacetone)copper

Synthesis of CZTS nanoparticles for low-cost solar cells

In this work, uniformly sized Cu2ZnSnS4 (CZTS) nanoparticles with easy control of chemical composition were synthesized and printable ink containing CZTS nanoparticles was prepared for low-cost solar cell applications. In addition, we studied the effects of synthesis conditions, such as reaction temperature and time, on properties of the CZTS nanoparticles. For CZTS nanoparticles synthesis process, the reactants were mixed as the 2:1:1:4 molar ratios. The reaction temperature and time was varied from 220C to 320C and from 3 hours to 5 hours, respectively. The crystal structure and morphology of CZTS nanoparticles prepared under the various conditions were investigated by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectroscopy (EDS) was used for compositional analysis of the CZTS nanoparticles.

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Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

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Line-beam scan irradiation for preparation of YBCO films with high-Jc by excimer-laser-assisted MOD (ELAMOD)

Preparation of epitaxial YBa2Cu3O7 (YBCO) films on cerium oxide-buffered sapphire (r-cut alpha-Al2O3) substrates by an excimer-laser-assisted metalorganic deposition (ELAMOD) is reported. The ELAMOD process has been developed to bring about the advantage of shorter heating time than that in the conventional metalorganic deposition; the coated films are irradiated by an excimer laser beam before firing. We initiated the ELAMOD-YBCO process using a homogenized 8-mm-square laser beam which irradiates the coated surface in a fixed substrate mode. In order to extend the process applicable to large-area films, a scan irradiation mode was employed and a high critical-current density over 6 MA/cm2 has been observed. In the process, an appropriate choice of laser energy is difficult but crucial to obtain YBCO films with high superconducting properties. Then, laser irradiation from backside of the substrate was examined and proved to be beneficial to extend the experimental window of the laser energy. Moreover, a newly developed ELAMOD process using a 90-mm-wide line-beam is also reported which has a potential ability for large-area applications.

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

 

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Creation of RT-FM in CdO nanocrystalline powder by codoping with Cu and Gd: Effect of annealing in hydrogen atmosphere

Cadmium oxide codoped with Cu and Gd ions powders were synthesised by simultaneous thermal co-decomposition of a mixture of cadmium acetate dihydrate, bis(acetylacetonato)copper, and tris(acetylacetonato)gadolinium(III) complexes. The mass ratio of Cu/Cd is fixed while the Gd/Cd mass ratio varied systematically. The purpose of the present study is to prepare powders having room temperature ferromagnetic (RT-FM) properties. Thus, an amount from each powder was annealed in hydrogen atmosphere in order to study its influence on the magnetic properties. X-ray fluorescence (XRF) and X-ray diffraction (XRD) methods confirm the purity and the formation of single nanocrystalline structure of the as-prepared powders, thus, both Cu and Gd ions were incorporated into CdO lattice forming solid solutions. Magnetic measurements reveal that all doped CdO powders gained paramagnetic (PM) properties where the susceptibility increases linearly with increasing dopant Gd content; the measured effective magnetic moment of doped Gd3+ was 7muB. Furthermore, the created RT-FM is dependent on the Gd% doping level. Also, it was found that the hydrogenation of the powders slightly enhances their PM properties and strongly enhances or creates RT-FM. For hydrogenated CdO powder doped with 3.1% Gd, the coercivity (Hc), remanence (Mr), and saturation magnetization (Ms) were 283.2 Oe, 2.04 memu/g, and 6.67 memu/g, respectively. Also, under hydrogenation, the values of Hc, M r, and Ms were increased by ?145%, 476%, and 131%, respectively in comparison with as prepared. Thus it was proved, for the first time, the possibility of production of CdO with RT-FM, where magnetic characteristics can be tailored by doping and post treatment under H2 atmosphere, thus a new potential candidate to be used as a dilute magnetic semiconductor (DMS).

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

 

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ALLYLIC VERSUS VINILIC OXIDATION OF CYCLOHEXENE PROMOTED BY TRANSITION METAL beta-DIKETONATES

We report the cyclohexene oxidation by molecular oxygen in the presence of several metal beta-diketonates. The catalytic conditions used showed an allylic/vinilic oxidation (ao/av) ratio equal 1.5. The complexes M(l)n were used with the metal ions Co(III), Ni(II), Pd(II), Cu(II), chelated with acetylacetone (AcAc), benzoylacetone (BeAc) and dibenzoylacetone (BeBe) as ligands. The oxidation selectivity of the studied system suggests a different allylic/vinylic pathway compared with that observed inprevious reports.

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

 

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Solution-based synthesis and characterization of Cu2ZnSnS 4 nanocrystals

(Figure Presented) Recent advances have been made in thin-film solar cells using CdTe and CuIn1-xGaxSe2 (CIGS) nanoparticles, which have achieved impressive efficiencies. Despite these efficiencies, CdTe and CIGS are not amenable to large-scale production because of the cost and scarcity of Te, In, and Ga. Cu2ZnSnS4 (CZTS), however, is an emerging solar cell material that contains only earth-abundant elements and has a near-optimal direct band gap of 1.45-1.65 eV and a large absorption coefficient. Here we report the direct synthesis of CZTS nanocrystals using the hotinjection method. In-depth characterization indicated that pure stoichiometric CZTS nanocrystals with an average particle size of 12.8 ¡À 1.8 nm were formed. Optical measurements showed a band gap of 1.5 eV, which is optimal for a single-junction solar device.

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

 

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Highly Monodisperse Cu-Sn Alloy Nanoplates for Efficient Nitrophenol Reduction Reaction via Promotion Effect of Tin

The hexagonal copper-tin alloy (Cu-Sn) nanoplates were synthesized using a high temperature solvent method, the length of six equilateral edges of hexagonal Cu-Sn nanoplates was 23 nm, and the thickness was 13 nm. The obtained hexagonal Cu-Sn nanoplates were highly monodisperse and allowed the formation of nanoarrays arranged with long-range order. The hexagonal Cu-Sn nanoplates exhibited high catalytic activity on catalytic hydrogenation of 4-nitrophenol to 4-aminophenol. Due to the promotion effect of Sn, the apparent rate constant (ka) of hexagonal Cu-Sn nanoplates was three times that of Cu nanoparticles. The density functional theory (DFT) calculations and experimental results demonstrated that Sn could promote the coordination process of -NO2 of 4-nitrophenol with Cu-Sn nanoplates and contribute to activation of 4-nitrophenol. In addition, the hexagonal Cu-Sn nanoplates showed high stability and reusability for the reduction reaction, good adaptability in different pH and the ionic strength, and wide applicability for the degradation of methylene blue, methyl orange, and rhodamine B, even in the industrial wastewater, suggesting that the Cu-Sn nanoplates are promising catalysts in organic industry wastewater treatment.

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

 

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.category: copper-catalyst, Name is Bis(acetylacetone)copper, molecular formula is C10H16CuO4, category: copper-catalyst. In a Article, authors is Berezin£¬once mentioned of category: copper-catalyst

Reactions of chelates with macrocyclic ligands. Complexation between tetraphenylporphine and Cu(II) complexes with alpha-amino acids

The reactions of tetraphenylporphine (H2TPP) with copper(II) chelates in DMSO were studied. alpha-Amino acids (glycine, alpha-alanine, valine, leucine, tyrosine, and glutamine) were used as chelating ligands. The study of the reaction kinetics showed that Cu(II) chelates with alanine and the other amino acids are less reactive in these reactions than acetylacetonates, alpha-nitroso-beta-naphtholates, and hydroxyquinolates. The exception is a Cu(II) complex with tyrosine. The relationship between the structure of the above chelates and the rate of their reactions with porphyrin was determined.

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Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 13395-16-9, name is Bis(acetylacetone)copper, introducing its new discovery. Quality Control of Bis(acetylacetone)copper

Complexation of tetraphenyltetrabenzoporphine with Cu(II), Cd(II), Zn(II), and Co(II) salts in organic solvents

The rate and activation parameters of tetraphenyltetrabenzoporphine (H 2TPTBP) complexation with 3d-metal acetates and acetylacetonates are shown to be determined by the solvent nature. With an increase in the electron-donor properties of a solvent, the reaction rate increases due to protonation of N-H bonds and decreases as MAm(Solv)n – m salt solvates become more stable. As the result, the rate of a reaction with ZnAc2 increases in the series: DMF < DMSO < Py < PrOH-1 < CH3CN < C6H6. In inert and weakly coordinating solvents, the transition state of a reaction is supposed to be formed according to the mechanism of contraction of the salt coordination sphere. The rate of H2TPTBP reaction with metal acetates in pyridine changes in the series: Cu(II) > Cd(II) > Zn(II) > Co(II), while the stability of the obtained complexes decreases in the series Cu(II) > Co(II) > Zn(II) > Cd(II). It is shown that the spectral criterion of the complex stability can be used in the series of metal complexes with one ligand, but it is violated if the ligand structure is changed.

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Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

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Desymmetrization of meso-N-sulfonylaziridines with chiral nonracemic nucleophiles and bases

The cyclohexene-derived aziridine 7-tosyl-7-azabicyclo[4.1.0]heptane (1) reacts with Grignard reagents in the presence of chiral nonracemic Cu-catalysts to afford sulfonamides 3a-e in up to 91% ee under optimized conditions. No activation of the aziridine by Lewis acids is required. The reaction may be extended to other bicyclic N-sulfonylated aziridines, but aziridines derived from acyclic olefins, cyclooctene, and trinorbornene are unreactive under standard conditions. Exposure of 1 to s-BuLi in the presence of (-)-sparteine (2.8 equiv.) affords the allylic sulfonamide 31 in 35% yield and 39% ee. Under the same conditions, the aziridines 33 and 35 yield products 34 and 36 derived from intramolecular carbenoid insertion with 75 and 43% ee, respectively.

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Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Reference of 13395-16-9, One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time.Mentioned the application of 13395-16-9.

Transition metal complexes containing the S(NtBu)42- tetraimidosulfate dianion

Three novel metal complexes [(acac)2Cu2(NtBu)4S] (3), [Li(thf)4]2[I4Cd2(NtBu)4S] (4) and [(thf)2Li{(SiMe3)2N}Zn(NtBu)4S] (5) are prepared from the intended transmetalation of the dilithium complex of N,N?,N??,N???-tetrakis(tert-butyl)tetraimidosulfate [(thf)4Li2(NtBu)4S] (1). The two lithium cations are replaced by either the cationic (acac)Cu(ii) moiety, the neutral I2Cd(ii) residue or only a single lithium cation is substituted by the cationic (Me3Si)2NZn(ii) fragment. The complexes show two main results: first the S(NtBu)42- tetrahedron can serve as a ligand to transition metals from the soft Cu(ii) to the harder Zn(ii) at opposite sides and second the S-N bond distances vary only marginally in response to the various metals and the four distances constantly sum up to 6.38(2) A. Hence the electropositive sulfur atom responds by internal shift to the metal-polarized negative charge at the outside of the S(NR)42- tetrahedron. This journal is

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Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”