Tag: M.W:100-200

In an article, author is Kulikova, Mayya V., once mentioned the application of 18742-02-4, Name is 2-(2-Bromoethyl)-1,3-dioxolane, molecular formula is C5H9BrO2, molecular weight is 181.0278, MDL number is MFCD00003216, category is copper-catalyst. Now introduce a scientific discovery about this category, Safety of 2-(2-Bromoethyl)-1,3-dioxolane.

Properties of Cu-Co Composite Catalysts for Synthesis of Aliphatic Alcohols

Cu-Co-containing cellulose-based carbon composite materials (Cu-Co/Cel) were formed by a matrix isolation method. Using X-ray diffraction (XRD), transmission electron microscopy (TEM), infrared-Fourier spectroscopy (IR-Fourier spectroscopy), and non-isothermal research methods, the physicochemical properties of the composites were established. The catalysts are nanosized particles distributed in a carbon matrix, containing fragments of a system of conjugated bonds (C=C-C=C) of various lengths. Cu-Co/Cel catalysts are active in the synthesis of alcohols from CO and H-2, demonstrating high CO conversion (68%) and specific activity (17 mol CO g(Me)(-1) s(-1)). Differences in the mechanism of alcohol formation from CO and H-2 on cellulose-based composites and an oxide support (comparison catalyst) were shown by analyzing the distribution of synthesis products.

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

 

Electric Literature of 2568-25-4, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 2568-25-4, Name is Benzaldehyde Propylene Glycol Acetal, SMILES is CC1OC(C2=CC=CC=C2)OC1, belongs to copper-catalyst compound. In a article, author is Kaminski, Piotr, introduce new discover of the category.

The Application of Copper-Gold Catalysts in the Selective Oxidation of Glycerol at Acid and Basic Conditions

The crude glycerol is produced during the transesterification of animal fats and vegetable oils, but it is a by-product of this process. Currently, its elimination is a problem in the chemical industry. The main goal of this work was the preparation, characterization and application of mesoporous cerium-zirconium oxide as supports for copper and gold species and the comparison of selected factors on the properties of catalysts in glycerol oxidation in the liquid phase. The samples were characterized using adsorption and desorption of nitrogen, XRD, UV-vis, XPS, TEM, SEM, and STEM-EDXS. The obtained results of glycerol oxidation show that the bimetallic copper-gold catalysts are more active and selective to glyceric acid in this reaction than analogous monometallic gold catalysts. Additionally, bimetallic catalysts are also characterized by the catalytic stability, and their application leads to the increase of selectivity to glyceric acid during their reusing in glycerol oxidation in alkali media. In this work, the influence of selected factors, e.g., oxygen source and its pressure, solution pH, and base content on the catalytic activity of bimetallic catalysts is discussed.

Electric Literature of 2568-25-4, One of the oldest and most widely used commercial enzyme inhibitors is aspirin, which selectively inhibits one of the enzymes involved in the synthesis of molecules that trigger inflammation. you can also check out more blogs about 2568-25-4.

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

 

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 14347-78-5, Name is (R)-(2,2-Dimethyl-1,3-dioxolan-4-yl)methanol, molecular formula is C6H12O3. In an article, author is Singh, Gurmeet,once mentioned of 14347-78-5, COA of Formula: C6H12O3.

Catalytic hydrogenation of furfural to furfuryl alcohol over chromium-free catalyst: Enhanced selectivity in the presence of solvent

Copper chromite (Cr2CuO4) catalyst is commercially being used for hydrogenation of furfural (FAL) to furfuryl alcohol (FA). However, due to the negative environmental impact of chromium, the use of a chromium-free catalyst has become a logical choice. In order to develop Cr-free catalysts, several Cu-Zn-X-Y [X and Y = additives] based trimetallic and tetrametallic catalysts were synthesized and tested for selective hydrogenation of furfural to furfuryl alcohol in different solvents. The characterization of catalysts using XRD, N-2 sorption, H-2-TPR, and HRTEM reveals the synergetic effect between CuO and ZnO interface. Interestingly, the strong influence of solvents was observed on the catalytic activity and selectivity. The positive influence of the solvent on enhancing selectivity was associated with the hydrogen bond donation (HBD) and hydrogen bond acceptance (HBA) capability. Water, a green solvent, has been found the most effective solvent. The high hydrogen bond donor capability of water was responsible for the strong positive effect. The effect of parameters, such as H-2 pressure, catalyst loading, furfural concentration, temperature, and reaction time, was studied on catalyst performance. Excellent selectivity for furfuryl alcohol >= 99% was obtained at mild operating conditions of temperature of 100 degrees C and H-2 pressure of 1 MPa. The kinetic study revealed that the furfural conversion profile was well fitted by the first-order kinetic model. The best CZAl catalyst showed reproducible activity up to 5 cycles.

Interested yet? Keep reading other articles of 14347-78-5, you can contact me at any time and look forward to more communication. COA of Formula: C6H12O3.

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

 

Reference of 16606-55-6, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 16606-55-6, Name is (R)-4-Methyl-1,3-dioxolan-2-one, SMILES is O=C1OC[C@@H](C)O1, belongs to copper-catalyst compound. In a article, author is Khan, Wasim U., introduce new discover of the category.

Copper-Promoted Cobalt/Titania Nanorod Catalyst for CO Hydrogenation to Hydrocarbons

The effect of Cu on cobalt/titania nanorod (Co/TNR) catalysts for the promotion of carbon monoxide (CO) hydrogenation to hydrocarbons was investigated. Varying amounts of Cu (1.5-6.0 wt%) were loaded onto the base Co/TNR catalyst using the deposition-precipitation method. Characterization by X-ray diffraction (XRD) revealed that the Cu particles were well dispersed over the Co/TNR catalysts. Characterizations by temperature-programmed desorption of hydrogen (H-2-TPD) and carbon monoxide (CO-TPD) and temperature-programmed reduction in hydrogen (H-2-TPR) proved the effect of the Cu promoter in the Co/TNR catalyst by its bimetal effect with Co, where the Co/TNR catalysts containing Cu generally showed a significant improvement in comparison with the base Co/TNR catalyst not containing the Cu promoter. The CO and H-2 adsorption capacities and reducibility were optimal on the catalyst containing 1.5% Cu (1.5Cu-Co/TNR). This aligns well with the catalytic activity performance of all the catalysts, where the 1.5Cu-Co/TNR catalyst exhibited the best performance, yielding 16.8% CO conversion and 57.7% C5+ hydrocarbon selectivity at 240 celcius and 5 bar.

Reference of 16606-55-6, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 16606-55-6.

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

 

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products, Formula: C6H12O3, 14347-78-5, Name is (R)-(2,2-Dimethyl-1,3-dioxolan-4-yl)methanol, molecular formula is C6H12O3, belongs to copper-catalyst compound. In a document, author is Mallavarapu, Akhila, introduce the new discover.

Ruthenium-Assisted Chemical Etching of Silicon: Enabling CMOS-Compatible 3D Semiconductor Device Nanofabrication

The semiconductor industry’s transition to three-dimensional (3D) logic and memory devices has revealed the limitations of plasma etching in reliable creation of vertical high aspect ratio (HAR) nanostructures. Metal-assisted chemical etch (MacEtch) can create ultra-HAR, taper-free nanostructures in silicon, but the catalyst used for reliable MacEtch-gold-is not CMOS (complementary metal-oxide-semiconductor)-compatible and therefore cannot be used in the semiconductor industry. Here, for the first time, we report a ruthenium MacEtch process that is comparable in quality to gold MacEtch. We introduce new process variables-catalyst plasma pretreatment and surface area-to achieve this result. Ruthenium is particularly desirable as it is not only CMOS-compatible but has also been introduced in semiconductor fabrication as an interconnect material. The results presented here remove a significant barrier to adoption of MacEtch for scalable fabrication of 3D semiconductor devices, sensors, and biodevices that can benefit from production in CMOS foundries.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 14347-78-5. Formula: C6H12O3.

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

 

In an article, author is Huang, Xuemin, once mentioned the application of 16606-55-6, Name is (R)-4-Methyl-1,3-dioxolan-2-one, molecular formula is C4H6O3, molecular weight is 102.09, MDL number is MFCD00798265, category is copper-catalyst. Now introduce a scientific discovery about this category, Category: copper-catalyst.

A dual-mode strategy for sensing and bio-imaging of endogenous alkaline phosphatase based on the combination of photoinduced electron transfer and hyperchromic effect

Benefit from the additional correction of the output signal in dual-mode detection, traditional dual signal readout strategies are performed by constructing the ratiometric fluorescent probe through excitation energy transfer (EET) or fluorescence resonance energy transfer (FRET). To avoid the complicated modification process and obtain the results rapidly, a simple dual-mode sensing strategy based on the electronic effects of p-nitrophenol (PNP) is described to monitor the activities of alkaline phosphatase (ALP). In the sensing platform, p-nitrophenylphosphate was used as a substrate to produce the PNP using ALP as the catalyst. Due to the PNP possesses negative effect of induction and conjugation, photoinduced electron transfer and hyperchromic effect have been achieved between PNP and polyethyleneimine-protected copper nanoclusters (PEI-Cu NCs), which caused the changes of the fluorescence intensity and UV-visible absorption. The dual-mode signal sensing system showed the satisfactory linear results of ALP from 1 to 100 U/L for fluorescent sensing strategy and 1-70 U/L for the absorption method with a competitive LOD of 0.27 and 0.87 U/L (signal-to-noise ratio of 3). This strategy detected biological ALP in human serum and bio-imaging of endogenous ALP in A549 cells successfully, which verifies a certain potential of the strategy for the practical applications. (C) 2020 Published by Elsevier B.V.

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Reference:
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. 16606-55-6, Name is (R)-4-Methyl-1,3-dioxolan-2-one, SMILES is O=C1OC[C@@H](C)O1, in an article , author is Gungor, Fusun Seyma, once mentioned of 16606-55-6, Application In Synthesis of (R)-4-Methyl-1,3-dioxolan-2-one.

Non-peripherally substituted metallophthalocyanines catalyzed diastereoselective carbonyl-ylide reactions: Synthesis and DFT calculations

Many catalysts are used to control the chemo-selectivity, diastereoselectivity, and enantioselectivity in carbenoid reactions. In this work, the [4 + 1] carbonyl-ylide reaction of dimethyl diazomalonate with ccionone and the [3 + 2] carbonyl-ylide reaction of dimethyl diazomalonate with thiophene-2carbaldehyde were chosen to obtain enriched diastereomeric products with the synthesized metallophthalocyanine compounds as catalysts. Four metallophthalocyanines (MPcs) including two neopenthoxy substituted and two novel fenchoxy substituted on non-peripheral positions of phthalocyanine ring were synthesized. Their catalytic activities were also compared with several common catalysts. Our results showed that in both reactions copper-Pc with neopentyl is the most effective catalyst to obtain diastereoselective results with diastereomeric product ratios of 30:70 and 10:90. DFT calculations also performed to explain the effect of the catalyst in diastereoselectivity. The calculations were in good agreement with the experimental results and assisted in understanding the selectivity. (C) 2020 Elsevier Ltd. All rights reserved.

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Reference:
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. 18742-02-4, Name is 2-(2-Bromoethyl)-1,3-dioxolane, SMILES is C(C1OCCO1)CBr, in an article , author is Di, Jia-Qi, once mentioned of 18742-02-4, Quality Control of 2-(2-Bromoethyl)-1,3-dioxolane.

Copper anchored on phosphorus g-C3N4 as a highly efficient photocatalyst for the synthesis of N-arylpyridin-2-amines

A heterogeneous photocatalyst based on copper modified phosphorus doped g-C3N4 (Cu/P-CN) has been prepared and characterized. This recyclable catalyst exhibited high photocatalytic activity for the synthesis of N-arylpyridin-2-amine derivatives by the reaction of 2-aminopyridine and aryl boronic acid at room temperature under the irradiation of blue light. Importantly, the range of substrates for this coupling reaction has been expanded to include aryl boronic acids with strong electron-withdrawing groups as viable raw materials. In addition, this heterogeneous catalyst can be used at least 6 times while maintaining its catalytic activity.

Interested yet? Read on for other articles about 18742-02-4, you can contact me at any time and look forward to more communication. Quality Control of 2-(2-Bromoethyl)-1,3-dioxolane.

Reference:
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, Formula: C6H12O314347-78-5, Name is (R)-(2,2-Dimethyl-1,3-dioxolan-4-yl)methanol, SMILES is OC[C@H]1OC(C)(C)OC1, belongs to copper-catalyst compound. In a article, author is Hsu, Che-Jung, introduce new discover of the category.

Simultaneous aqueous Hg(II) adsorption and gaseous Hg-0 re-emission inhibition from SFGD wastewater by using Cu and S co-impregnated activated carbon

Seawater flue gas desulfurization (SFGD) has shown great effectiveness in the controlling of sulfur dioxide (SO2) emission and the removing of mercury (Hg) from flue gases of coal-fired power plants. Some problems pertaining to SFGD for Hg control, however, remain to be solved: (1) environmental impact from the discharge of Hg-containing seawater to the ocean, and (2) re-emission of gaseous Hg from the aeration tank to the atmosphere. This study synthesizes the copper/sulfur co-impregnated activated carbon (Cu-S-AC) to simultaneously capture aqueous Hg(II) and inhibit gaseous Hg-0 re-emission from actual SFGD wastewater. Cu-S-AC exhibited greater Hg(II) adsorption than both raw activated carbon (AC) and sulfur-impregnated activated carbon (S-AC) at an initial Hg(II) concentration of higher than 8000 ng/L. The Hg(II) adsorption of Cu-S-AC was slightly greater at pH 7 and 8 than that under acidic conditions. The Hg(II) adsorption was well-fitted with both linear and Freundlich isotherms. The results of thermodynamic analyses veiled the endothermic and spontaneous adsorption of Hg(II) on Cu-S-AC. In addition, the pseudo-second-order equation provided the best correlation coefficient for the Hg(II) adsorption on Cu-S-AC. Notably, the increases of pH and temperature increased the Hg-0 re-emission. Nevertheless, Cu-S-AC addition significantly inhibited the Hg-0 re-emission (92%) from SFGD wastewater. (C) 2020 Elsevier Ltd. All rights reserved.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 14347-78-5. Formula: C6H12O3.

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

 

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 16606-55-6, Name is (R)-4-Methyl-1,3-dioxolan-2-one, SMILES is O=C1OC[C@@H](C)O1, belongs to copper-catalyst compound. In a document, author is Roberts, Charles A., introduce the new discover, Name: (R)-4-Methyl-1,3-dioxolan-2-one.

Effect of Cu substitution on the structure and reactivity of CuxCo3-xO4 spinel catalysts for direct NOx decomposition

A Cu-substituted, Co-based spinel catalyst (CuxCo3-xO4) is introduced for direct NO decomposition to N-2 and O-2. A series of CuxCo3-xO4 catalysts with varying Cu content (0 <= x <= 1) were synthesized via a co-precipitation method. Reactivity for direct NO decomposition was measured at 450 degrees C, with the maximum activity of 2.8 x 10(-2) [(mu mol NO to N-2) g(-1) s(-1)] and selectivity to N-2 of 61 % occurring over the Cu0.4Co2.6O4 (x = 0.4) catalyst. Additionally, the CuxCo3-xO4 catalysts demonstrated the ability to mitigate N2O formation as all traces of this greenhouse gas were decomposed regardless of Cu content. Characterization by X-ray diffraction and Xray absorption spectroscopy revealed the effects of Cu substitution on the occupancies and valencies of the Co and Cu ions in the spinel structure. Activity was shown to correlate with increasing incorporation of Cu2+ into the tetrahedral sites of the normal spinel structure; however, significant formation of a segregated CuO phase caused the activity to decrease when x >= 0.4. The bulk structure-activity relationships we elucidate are expected to provide a guide for the design of improved direct NO decomposition catalysts and other bulk oxide catalyst systems based on careful design of the cation arrangements in oxides.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 16606-55-6 is helpful to your research. Name: (R)-4-Methyl-1,3-dioxolan-2-one.

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