44001-04-9

Upstream product

• 7758-99-8 copper(II) sulfate 
• 16089-31-9 diamminecopper(I) 
• 7664-41-7 ammonia 
• 12775-96-1 copper 
• 14127-61-8 calcium(II) ion 
• 52666-91-8 thiocyanic acid ; copper (II)-compound with ammonia 
• 28101-94-2 copper(II) triammoniate 
• 12125-02-9 ammonium chloride 
• 1336-21-6 ammonium hydroxide 

Downstream Products

• 1402164-67-3 [Cu(para-tert-butylbenzoic acid N',N'-dimethylhydrazide(-1H))2] 

Relevant academic research and scientific papers

Coordination of the Copper Centers in Particulate Methane Monooxygenase: Comparison between Methanotrophs and Characterization of the CuCSite by EPR and ENDOR Spectroscopies

In nature, methane is oxidized to methanol by two enzymes, the iron-dependent soluble methane monooxygenase (sMMO) and the copper-dependent particulate MMO (pMMO). While sMMO’s diiron metal active site is spectroscopically and structurally well-characterized, pMMO’s copper sites are not. Recent EPR and ENDOR studies have established the presence of two monocopper sites, but the coordination environment of only one has been determined, that within the PmoB subunit and denoted CuB. Moreover, this recent work only focused on a type I methanotrophic pMMO, while previous observations of the type II enzyme were interpreted in terms of the presence of a dicopper site. First, this report shows that the type IIMethylocystisspecies strain Rockwell pMMO, like the type I pMMOs, contains two monocopper sites and that its CuBsite has a coordination environment identical to that of type I enzymes. As such, for the full range of pMMOs this report completes the refutation of prior and ongoing suggestions of multicopper sites. Second, and of primary importance, EPR/ENDOR measurements (a) for the first time establish the coordination environment of the spectroscopically observed site, provisionally denoted CuC, in both types of pMMO, thereby (b) establishing the assignment of this site observed by EPR to the crystallographically observed metal-binding site in the PmoC subunit. Finally, these results further indicate that CuCis the likely site of biological methane oxidation by pMMO, a conclusion that will serve as a foundation for proposals regarding the mechanism of this reaction.

Unprecedented [d9]Cu?[d10]Au coinage bonding interactions in {Cu(NH3)4[Au(CN)2]}+[Au(CN)2]?salt

The X-ray structure of the {Cu(NH3)4[Au(CN)2]}+[Au(CN)2]?salt is reported showing an unprecedented [d9]Cu?[d10]Au coinage bond. The physical nature of the interaction

Synthesis of 1-azaspiro[4.4]nonan-1-oxyls via intramolecular 1,3-dipolar cycloaddition

Sterically shielded nitroxides of the pyrrolidine series have shown the highest resistance to reduction. Here we report the synthesis of new pyrrolidine nitroxides from 5,5-dialkyl-1-pyrroline N-oxides via the introduction of a pent-4-enyl group to the nitrone carbon followed by an intramolecular 1,3-dipolar cycloaddition reaction and isoxazolidine ring opening. The kinetics of reduction of the new nitroxides with ascorbate were studied and compared to those of previously published (1S,2R,3′S,4′S,5′S,2″R)-dispiro[(2-hydroxymethyl)cyclopentan-1,2′-(3′,4′-di-tert-butoxy)pyrrolidine-5′,1″-(2″-hydroxymethyl)cyclopentane]-1′-oxyl (1).

Temperature-Induced Stacking to Create Cu2O Concave Sphere for Light Trapping Capable of Ultrasensitive Single-Particle Surface-Enhanced Raman Scattering

The fabrication of bowl or concave particles with “asymmetric centers” has drawn considerable attentions, in which multiple scattering occurs inside the particles and the ability of light scattering is distinctly enhanced. However, the limited variety of templates, the uncontrollable dimensions such as the size of concavity and the complex growth process have posed serious limitations to the reproducible construction of concave particles with desired geometries and their light-trapping properties. Herein, a “temperature-induced stacking” strategy is proposed to create controllable concavity Cu2O spheres for the first time. Different sizes of F68 micelles can be formed through aggregation under different reaction temperatures, which can serve as soft template to tailor concave geometries of Cu2O spheres. The as-prepared Cu2O concave sphere (CS) can serve as single-particle (SP) surface-enhanced Raman scattering (SERS) substrate for highly repeatable and consistent Raman spectra. The unique cavity of Cu2O CS entraps light effectively, which also enhances the scattering length owing to multiple light scattering. Combined with slightly increased surface area and charge-transfer process, Cu2O CS exhibits remarkable single-particle SERS performance, with an ultralow low detection limit (2 × 10?8 mol L?1) and metal comparable enhancement factor (2.8 × 105).

Control of Heterometallic Three-Dimensional Macrocycles with Aromatic Stacks in Tunable Host Cavities

Using coinage metal (Cu(II), Ag(I)) hinges, two sets of heterometallic molecular capsules with analogous open-ended cavities were prepared based on the half-sandwich rhodium fragments. In the case of [Rh4Cu4] cages, up to six-fold-stacked host-guest structures were formed by varying the cavity's dimensions. Moreover, the series of capsules were demonstrated to self-fine-tune to form multi-heteroguest arrays via favourable donor-acceptor π interactions and Ag-π interactions, as evidenced from single-crystal X-ray analysis.

Decorating of Ag and CuO on Cu Nanoparticles for Enhanced High Catalytic Activity to the Degradation of Organic Pollutants

Metal/semiconductor composites are promising catalysts with superior catalytic activity. In this work, a Cu/CuO-Ag composite with structure that consisted of Ag and CuO nanoparticles (NPs) decorated on the surface of Cu were fabricated via a facile in situ method. With characterization by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), and inductively coupled plasma atomic emission spectrometry (ICP-AES), the structure and components of the Cu/CuO-Ag composite were well-defined. The Cu/CuO-Ag composite exhibited superior catalytic activities for the reduction of 4-nitrophenol (4-NP) in the presence of NaBH4 with just a trace amount of Ag NPs (1.28 wt %). The reduction reaction is completed in 75 s with an apparent rate constant kapp of 4.60 × 10-2 s-1. The Cu/CuO-Ag composite also showed excellent durable catalytic stability, as no significant activity loss was detected in the consecutive five reaction runs. With the aid of the Sabatier principle and volcano plot, the opportune chemical adsorption energy of the reagent 4-NP on the Cu/CuO-Ag composite was inferred to be the key to its high reaction rate. The CuO NPs as a semiconductor with narrow band gap also could help the Cu/CuO-Ag composite to capture the electrons/hydride ions and increase opportunities for 4-NP to be reduced. Furthermore, the Cu/CuO-Ag composite exhibited outstanding activity on the oxidative degradation of methylene blue (MB). This work enriched the bimetal/semiconductor catalyst system and supplied new insight into the catalysis mechanism.

Externally and Internally Functionalized Copper(II) β-Diketonate Molecular Squares

Five functionalized bis(β-diketones) and their Cu(II) molecular squares are described. The new bis(β-diketones), m-pbhxH2 (3), 5-MeO-m-pbaH2 (4), 5-BuO-m-pbaH2 (5), 2-MeO-m-pbaH2 (6), and 2-MeO-m-pbprH2/su

The estimation of the stability of ionite complexes formed in the sorption of copper cations by weakly alkaline AM-7 anionite

The sorption of copper cations by the complex-forming AM-7 anionite was studied. It was shown that the sorption of copper ions from aqueous solutions was satisfactorily described by the Langmuir equation. The linear approximation to this equation can be u

Copper β-diketonate molecular squares and their host-guest reactions

(Figure Presented) All square: Treatment of m-phenylene-bis(β- diketones) with [Cu(NH3)4]2+ yields molecular squares rather than the expected hexagons. The squares react readily with guests such as C60 (see stru

Chiral symmetry breaking by chemically manipulating statistical fluctuation in crystallization

Breaking out: By introducing a relatively stable intermediate to chemically control the nucleation rate, chiral symmetry breaking was achieved in the crystallization of intrinsically chiral helical coordination polymers. The fewer crystal clusters formed, the more pronounced the symmetry breaking (see picture). (Graph Presented)