Day: March 11, 2021

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Copper(II) and zinc(II) complexes with Hydrazone: Synthesis, crystal structure, Hirshfeld surface and antibacterial activity

The present study reports the synthesis and characterization of six Cu(II) and Zn(II) complexes with 2-cetylpyridinenicotinichydrazone (HL). The characterization of the complexes were applied by conductivity measurements and spectroscopic techniques (FT-IR, UV?Vis, ESI(+)-MS and NMR 1H). Four complexes have been studied by single crystal X-ray diffraction, [Cu(L)2] (1), [Zn(L)2] (2), [CuCl2(HL)] (3) and [CuBr2(HL)] (4). Important interactions upon the molecular packing were also performed by the analysis of their Hirshfeld surfaces and compared to the 2D-fingerprint plots. The characterizations indicates the formation of mononuclear Cu(II) and Zn(II) complexes with the hydrazone ligand coordinated to the metal ions in tridentate mode through the NNO chelating system. The antibacterial activity of HL and its metal complexes was tested against cariogenic bacteria strains.

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

 

Electric Literature of 1111-67-7, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a article£¬once mentioned of 1111-67-7

Two new supramolecular compounds induced by novel vinylpyridine cationic templates: synthesis, structures and enhanced photocatalytic properties

Abstract: Two novel complexes {(Pepy)[Cu2(SCN)4]}n (1) and {(Pepy)[Cu2Br4]}n (2) [Pepy=1-2-(Pyridinium-1-yl)-1-ethenyl) pyridinium] based on vinylpyridinium organic cation and cuprous salts have been synthesized and characterized by X-ray diffractometry. Compound 1 has a 2D polypseudorotaxane structure and compound 2 presents a 1D chain structure. Furthermore, the thermal gravimetric analysis (TGA), UV?Vis diffuse reflectance spectra, the morphology and the photocatalytic performances were studied carefully. Remarkably, both 1 and 2 exhibited good photocatalytic degradation abilities towards some dyes. Graphical Abstract: Two novel complexes {(Pepy)[Cu2(SCN)4]}n and {(Pepy)[Cu2Br4]}n [Pepy=1-2-(Pyridinium-1-yl)-1-ethenyl) pyridinium] based on vinylpyridinium cation and cuprous salts have been synthesized. They exhibited diverse structures and good photocatalytic properties.[Figure not available: see fulltext.].

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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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Facile synthesis of a hierarchical CuS/CuSCN nanocomposite with advanced energy storage properties

We introduce CuS/CuSCN nanocomposites as active materials in pseudocapacitors, in which the redox reactions of both CuS and CuSCN simultaneously contribute to energy storage. This nanocomposite is prepared using an in situ methodology via facile, low-energy-consuming green nanochemistry. The CuS/CuSCN nanocomposites offer a high capacitance compared to their individual constituents. CuS nanorods (?15 nm) are anchored on the surface of CuSCN nanosheets (?100 nm) and they interconnect the CuSCN nanosheets, producing mesoporous nanoclusters with a large surface area, thus improving the charge transfer efficiency. The CuS/CuSCN nanocomposites exhibit high electrical conductivity and strong redox reactivity, and in particular, the pseudocapacitor with a compositional ratio of 1:1 exhibits the highest charge transfer efficiency. Consequently, the 11 CuS/CuSCN active material exhibits a high energy density (approximately 63 W h kg-1) and a high power density (1.9 kW kg-1 at 9.0 W h kg-1) as a single electrode. The highest specific capacitance is measured to be 1787.3 F g-1 in the single electrode. Furthermore, an aqueous asymmetric hybrid supercapacitor based on the CuS/CuSCN 1:1//activated carbon (AC) shows an approximately four times increase in the power density (7.9 kW kg-1), compared to the single electrode.

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

 

Application of 1111-67-7, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a article£¬once mentioned of 1111-67-7

Carbon coated TiO2 nanoparticles prepared by pulsed laser ablation in liquid, gaseous and supercritical CO2

We report on the synthesis of TiO2 nanoparticles using nanosecond pulse laser ablation of titanium in liquid, gaseous and supercritical CO2. The produced particles were observed to be mainly anatase-TiO2 with some rutile-TiO2. In addition, the particles were covered by a carbon layer. Raman and x-ray diffraction data suggested that the rutile content increases with CO2 pressure. The nanoparticle size decreased and size distribution became narrower with the increase in CO2 pressure and temperature, however the variation trend was different for CO2 pressure compared to temperature. Pulsed laser ablation in pressurized CO2 is demonstrated as a single step method for making anatase-TiO2/carbon nanoparticles throughout the pressure and temperature ranges 5-40 MPa and 30 C-50 C, respectively.

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

 

Synthetic Route of 1111-67-7, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a article£¬once mentioned of 1111-67-7

Synthesis, Crystal Structures and Thermal Properties of the New Copper(I) Pseudohalide Coordination Polymers Catena[(mu2-thiocyanato-N,S)-(1- ethyl-2-methylpyrazine-N)]copper(I) and Poly[(di-mu2-tniocyanato-N, S)-(mu2-1-ethyl-2-methylpyrazine-N,N?)]dicopper(I)

Reaction of copper(I) thiocyanate with 1-ethyl-2-methyl-pyrazine in acetonitrile yields the two new coordination polymers catena[(mu 2-thiocyanato-N,S)-(1-ethyl-2-methylpyrazine-N)] copper(I)(I) and poly[(di-mu2-thiocyanato-N,S)-(mu2-1-ethyl-2-methyl- pyrazine-N,N?)] di-copper(I) (II). The crystal structure of I is composed of CuSCN double chains in which each copper atom is connected to two thiocyanate anions and two 1-ethyl-2-methyl-pyrazine ligands. In this compound only one nitrogen atom of the 1-ethyl-2-methyl-pyrazine ligand is involved in copper coordination. The crystal structure of II is composed of CuSCN layers that are connected by the N-donor ligands via mu-N,N? coordination into a three-dimensional coordination network. On heating the amine rich compound I loses half of the ligands and transforms into the amine-poorer compound II which occurs as an intermediate. Compound II decomposes on further heating to CuSCN. This reaction was investigated using simultaneous differential thermoanalysis and thermogravimetry coupled with mass spectroscopy and temperature dependent X-ray powder diffraction.

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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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Electron and hole transport layers optimization by numerical simulation of a perovskite solar cell

In this paper an n-i-p perovskite solar cell was studied using SCAPS simulator. The primary solar cell’s structure is FTO/ITO/Perovskite/PEDOT:PSS/Au which has achieved a power conversion efficiency of eta ? 13.94%. In order to enhance its performance, several materials were suggested as electron and hole transport layers (ETL and HTL). Among the proposed ETL materials it was found that Zinc oxide (ZnO) and titanium dioxide (TiO2) are the most adequate materials. For the HTL materials, among the proposed materials Copper (I) thiocyanate (CuSCN) forms the appropriate one. Also, the solar cell performance was improved by optimizing the absorber thickness which was found to be 1 mum. With these considerations the power conversion efficiency reached 25.02%. In addition, the detrimental effect of defects at the perovskite/TiO2 interface on the solar cell performance is also presented.

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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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COPPER MEDIATED REACTIONS IN NUCLEOSIDE SYNTHESIS

The regiospecific functionalization of the base moiety of purine nucleosides through copper-mediated nucleophilic reactions is described.

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

 

Let¡¯s face it, organic chemistry can seem difficult to learn. Recommanded Product: 1111-67-7. Especially from a beginner¡¯s point of view. Like Recommanded Product: 1111-67-7, Name is Cuprous thiocyanate. In a document type is Patent, introducing its new discovery.

SUBSTITUTED INDOLINE DERIVATIVES AS DENGUE VIRAL REPLICATION INHIBITORS

The present invention concerns substituted indoline derivatives, methods to prevent or treat dengue viral infections by using said compounds and also relates to said compounds for use as a medicine, more preferably for use as a medicine to treat or prevent dengue viral infections. The present invention furthermore relates to pharmaceutical compositions or combination preparations of the compounds, to the compositions or preparations for use as a medicine, more preferably for the prevention or treatment of dengue viral infections. The invention also relates to processes for preparation of the compounds.

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

 

Electric Literature of 1317-39-1, 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 1317-39-1.

Tubulin binding ligands and corresponding prodrug constructs

A diverse set of tubulin binding ligands have been discovered which are structurally characterized, in a general sense, by a semi-rigid molecular framework capable of maintaining aryl-aryl, pseudo pi stacking distances appropriate for molecular recognition of tubulin. In phenolic or amino form, these ligands may be further functionalized to prepare phosphate esters, phosphate salts, and phosphoramidates capable of demonstrating selective targeting and destruction of tumor cell vasculature.

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

 

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. Cuprous thiocyanate,introducing its new discovery. Recommanded Product: 1111-67-7

Integration of phenylammoniumiodide (PAI) as a surface coating molecule towards ambient stable MAPbI3 perovskite for solar cell application

In the present work, different hybrid perovskites were synthesized by gradual concentration variation of larger cation of phenylammoniumiodide (PAI) and methylammoniumiodide (MAI) in PbI2 solution with the aim of improving the stability of MAPbI3 film and photovoltaic efficiency. To understand the properties of perovskite like structural, optical, thermal, morphological and chemical state, extensive characterizations such as XRD, UV?visible spectroscopy, FE-SEM, SEM, EDX and XPS were performed. The role of PAI was investigated further with the use of DFT studies. The DFT results confirmed that the PAI was passivated on the surface of MAPbI3 with most stable arrangement. The stable arrangement revealed the formation of ?-? interactions within the phenyl rings, which shielded the MAI crystals and thereby resulted in enhanced stability of the perovskites. Highly protected perovskite consequently yielded high- performance solar cell device with enhanced stability under 60% humidity, high temperature exposure and longer time stability even when directly exposed to normal room temperature. The new investigation of capping techniques with the use of bigger organic molecules, high performance solar cell with low device costs could emerge. This could lead to unprecedented rapid progress on power conversion efficiency (PCE). Thus, more stable organic-inorganic hybrid perovskites could be developed for future applications.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Recommanded Product: 1111-67-7, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1111-67-7, in my other articles.

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