Category: copper-catalyst

Singh, Vivek published the artcilePrecursor to Gas Sensor: A Detailed Study of the Suitability of Copper Complexes as an MOCVD Precursor and their Application in Gas Sensing, Related Products of copper-catalyst, the publication is Inorganic Chemistry (2021), 60(22), 17141-17150, database is CAplus and MEDLINE.

There are very few p-type semiconductors available compared to n-type semiconductors for pos. sensing response for oxidizing gases and other important electronic applications. Cupric oxide (CuO) is one of the few oxides that show p-type conductivity, useful for sensing oxidizing gases. Many researchers obtained CuO using the chem. and solid-state routes, but uniformity and large-area deposition have been the main issues. Chem. vapor deposition is one such technique that provides control on several deposition parameters, which allow obtaining thin films having crystallinity and uniformity over a large area for the desired application. However, CuO-chem. vapor deposition (CVD) is still unfathomed due to the lack of suitability of copper precursors based on vapor pressure, contamination, and toxicity. Here, to address these issues, we have taken four Cu complexes (copper(II) acetylacetonate, copper(II) bis(2,2,6,6-tetramethyl-3,5-heptanedionato), copper(II) ethylacetoacetate, and copper(II) tert-butylacetoacetate), which are evaluated using thermogravimetry for suitability as a CVD precursor. The decomposition behavior of the complexes was also exptl. confirmed by depositing CuO thin films via CVD. Phase purity, decomposition, volatility, growth rate, and morphol. characteristics of the films are investigated in detail. Anal. suggests that copper(II) tert-butylacetoacetate has the highest vapor pressure and growth rate at a low temperature, making it the most suitable precursor for high-throughput CVD. Further, to investigate the role of these precursors, films deposited using Cu complexes were subjected to gas sensing. The CuO gas sensor fabricated on glass shows pronounced NO₂ sensing. The sensing results of CuO films have been explained from the standpoint of roughness, morphol., and unpassivated bonds present on the surface of films and vapor pressure of precursors. The higher d. of surface state and the lower resistivity of the Cu(tbaoac)₂ film lead to a sensor with higher responsivity and sensitivity (down to 1 ppm). These precursors can probably be utilized to improve the performance of other metal oxide gas sensors, especially Cu₂O and Cu-III-O₂.

Inorganic Chemistry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is C24H29N5O3, Related Products of copper-catalyst.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Nizelskii, Yu. M. published the artcileIntermolecular interaction of copper ethyl acetoacetate with linear polyurethanes, SDS of cas: 14284-06-1, the publication is Polimernii Zhurnal (2006), 28(4), 308-313, database is CAplus.

Linear polyurethanes (PU) based on poly(propylene glycol), TDI, and 1,4-butanediol were synthesized in the presence of copper bis(Et acetylacetate) (CEAA) and were characterized by IR-spectroscopy electronic spectroscopy and ESR. CEAA forms coordination bonds with PU matrix. X-ray methods (WAXS. SAXS) show amorphous and microheterogenenus structure of modified PUs.

Polimernii Zhurnal published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, SDS of cas: 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Nizelskii, Yu. M. published the artcileElectrical and mechanical properties of linear polyurethanes modified by copper ethyl acetoacetate, Safety of Copper(II) ethylacetoacetate, the publication is Polimernii Zhurnal (2007), 29(3), 218-221, database is CAplus.

Elec. and mech. properties of linear polyurethanes (PU) modified by bis(ethylacetoacetato)copper(II) were studied. Elec. conductivity of the modified PUs increased by 2-3 orders of magnitude. Elongation at break increased by the 1,5 order of magnitude.

Polimernii Zhurnal published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Safety of Copper(II) ethylacetoacetate.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Kondrat’ev, P. N. published the artcileReaction of polyfluorinated copper(II) β-diketonates and β-keto esterates with hydrazines, Safety of Copper(II) ethylacetoacetate, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1990), 640-5, database is CAplus.

Treating copper(II) β-diketonates I [R = Me, CF₃, CF₃(CF₂)₅; R¹ = Me] with NH₂NH₂.2HCl in H₂O containing NaOH gave 72-86% pyrazoles II (same R, R¹; R² = H). Similar reaction of I (R = R¹ = CF₃) gave 20% II (R = R¹ = CF₃; R² = H). Reaction of β-keto esterates I [R = CHF₂, CF₃, CF₃(CF₂)₃, Me, H(CF₂)₄; R¹ = OEt] with R²NHNH₂.xHCl (R² = H, x = 2; R² = Ph, x = 1) in EtOH containing NaOH gave 20-61% pyrazoles II (same R; R¹ = OH; R² = H, Ph). The structure of II [R = H(CF₂)₄, R¹ = OH, R² = Ph] was determined by x-ray crystallog.

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Safety of Copper(II) ethylacetoacetate.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Thankarajan, N. published the artcileAminolysis and transesterification reactions on bis(ethyl acetoacetato)copper(II), Safety of Copper(II) ethylacetoacetate, the publication is Journal of the Indian Chemical Society (1981), 58(7), 650-1, database is CAplus.

Aminolysis of the Cu(II) chelate of Et acetoacetic is a convenient and general method for preparing the Cu(II) chelates of acetoacetanilides. The β-ketoester chelate also undergoes facile transesterification reaction leading to Cu(II) chelates of other β-ketoesters, some of which are otherwise difficult to prepare The complexes were characterized through their phys. constants, anal. data, and IR spectra.

Journal of the Indian Chemical Society published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is C13H26N2, Safety of Copper(II) ethylacetoacetate.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Baidina, I. A. published the artcileCrystal and molecular structure of trans-bis(benzoyltrifluoroacetonato)copper(II), trans-Cu(C₆H₅COCHCOCF₃)₂, SDS of cas: 14284-06-1, the publication is Koordinatsionnaya Khimiya (1986), 12(4), 543-8, database is CAplus.

trans-CuL₂ (HL = benzoyltrifluoroacetone) was prepared from CuCl₂.2H₂L and HL in aqueous alc. neutralized to pH 6. trans-CuL₂ is monoclinic, space group P2₁/n, with a 17.008(6), b 5.654(2), c 10.366(2) Å, β 92.93(2)°, Z = 2, R_w = 0.041, B = 0.067 for 2596 reflections with I > 2σ(I). The square planar Cu complex has an O₄ coordination node. The energy of intermol. van der Waals interaction was calculated for CuL₂ and other Cu β-diketonate complexes. PtL₂ is orthorhombic, with a 8.1, b 10.6, c 11.5 Å, Z = 2.

Koordinatsionnaya Khimiya published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, SDS of cas: 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Rosenberg, Douwe published the artcileChemotherapeutic nitroheterocycles, XXVI. 5-Nitro-2-thiazolylpyrazoles and 5-nitro-2-thiazolylisoxazoles from 1,3-dicarbonyl compounds of the nitrothiazole series, COA of Formula: 0, the publication is Justus Liebigs Annalen der Chemie (1976), 13-21, database is CAplus.

5-Nitro-2-thiazolecarbonyl chloride (I) reacted with copper chelates II (R = EtO, Me, Ph, 4-ClC6H4, 2-furyl, 2-thienyl) to give 65-99% 1,3-dicarbonyl compounds III with a 5-nitro-2-thiazolyl moiety. III (R = Me, Ph) reacted with substituted hydrazines or hydroxylamine H2NXH (X = NH, NMe, NCH2CH2OH, NPh, O) to give 26-96% the title pyrazoles IV and (or V) (X = NH or substituted NH) or isoxazoles IV and(or) V (X = O). Some III have good antimicrobial activity (no data), but are very toxic and corrosive to the skin.

Justus Liebigs Annalen der Chemie published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, COA of Formula: 0.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Petkov, I. published the artcileUV and IR study of gamma-ray and fast electron beam initiated prototropic and metallotropic tautomerization of some β-dicarbonyl compounds and their Cu chelates in solution and in polymer (PVC) film, Recommanded Product: Copper(II) ethylacetoacetate, the publication is Radiation Physics and Chemistry (1995), 45(1), 121-30, database is CAplus.

The radiation induced keto-enol and chelate-carbeniate tautomerization of some β-dicarbonyl compounds and their copper complexes is studied in solution and in polymer (PVC) film. The samples are subjected to irradiation using a ⁶⁰Co source. The effects of the kGy doses in air on the percentage of the enol or chelate forms are investigated with UV- and IR-spectral methods. These radiation induced processes are discussed in terms of the mechanism proposed previously for the photoinduced ketonization and metallotropy of β-dicarbonyl compounds

Radiation Physics and Chemistry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Recommanded Product: Copper(II) ethylacetoacetate.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Johnson, P. R. published the artcileElectronic spectra of copper(II) β-ketoenolates. Intraligand and charge transfer transitions, Category: copper-catalyst, the publication is Journal of Molecular Structure (1975), 29(1), 97-103, database is CAplus.

The electronic spectra in (MeOH) of the Na salts and Cu(II) complexes of 13 β-diketones are reported within the energy range 25-48 kkaysers. Spectra of the Na salts of ligands with alkyl substituents exhibit 1 band which is assigned to the π3→π4 intraligand transition. Where aryl substituents are present, an addnl. benzenoid band is observed The spectra of the Cu complexes exhibit 2 bands whether aryl substituents are present or not. The band of lower energy is assigned to the π3→π4 transition and the band of higher energy to the σL→3dxy charge transfer transition. Intensity relations suggest that, where aryl substituents are present, the benzenoid band is superimposed on the charge transfer band. The observed transition energies exhibit a good level of agreement with those predicted by Hueckel MO calculations Comparison of the π3→π4 transition energies of the Cu complexes with those available for the β-ketoenolates of other metal ions supports indications from ESR spectra that there is very little π-orbital overlap in the Cu-O bonds.

Journal of Molecular Structure published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Category: copper-catalyst.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Tsuruya, Shigeru published the artcileCatalysis of copper(II) chelate-amine complexes in the oxidative coupling of 2,6-dialkylphenols, Related Products of copper-catalyst, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (1987), 25(4), 995-1010, database is CAplus.

The oxidative coupling reaction of 2,6-dimethylphenol (I) and 2,6-di-tert-butylphenol (II) with mol. O was effected in the presence of copper(II) chelate complex catalysts. The oxidation products of I were poly(2,6-dimethyl-1,4-phenylene oxide) and 3,3′,5,5′-tetramethyl-4,4′-diphenoquinone, and that of II was 3,3′,5,5′-tetra-tert-butyl-4,4′-diphenoquinone. The basicity and the steric bulkiness of the amine used as a ligand for copper(II) β-diketonato catalysts were 2 of the main factors that governed the oxidative coupling of I. The rate of O consumption for copper(II) bisacetylacetonate-piperidine system was first order with respect to O partial pressure and zero order with respect to I concentration

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is C4H3Cl2N3, Related Products of copper-catalyst.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”