Month: April 2021

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 101-55-3, Name is 1-Bromo-4-phenoxybenzene, SMILES is BrC1=CC=C(OC2=CC=CC=C2)C=C1, belongs to ethers-buliding-blocks compound. In a document, author is Wen, Zhipeng, introduce the new discover, Application In Synthesis of 1-Bromo-4-phenoxybenzene.

Ag-modified hydrogen titanate nanowire arrays for stable lithium metal anode in a carbonate-based electrolyte

In the investigation of the next-generation battery anode, Li metal has attracted increasing attention owing to its ultrahigh specific capacity and low reduction potential. However, its low columbic efficiency, limited cycling life, and serious safety hazards have hindered the practical application of rechargeable Li metal batteries. Although several strategies have been proposed to enhance the electrochemical performance of Li metal anodes, most are centered around ether-based electrolytes, which are volatile and do not provide a sufficiently large voltage window. Therefore, we aimed to attain stable Li deposition/stripping in a commercial carbonate-based electrolyte. Herein, we have successfully synthesized hydrogen titanate (HTO) nanowire arrays decorated with homogenous Ag nanoparticles (NPs) (Ag@HTO) via simple hydrothermal and silver mirror reactions. The 3D cross-linked array structure with Ag NPs provides preferable nucleation sites for uniform Li deposition, and most importantly, when assembled with the commercial LiNi0.5Co0.2Mn0.3O2 cathode material, the Ag@HTO could maintain a capacity retention ratio of 81.2% at 1 C after 200 cycles, however the pristine Ti foil failed to do so after only 60 cycles. Our research therefore reveals a new way of designing current collectors paired with commercial high voltage cathodes that can create high energy density Li metal batteries. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

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 101-55-3 is helpful to your research. Application In Synthesis of 1-Bromo-4-phenoxybenzene.

Application of 5111-65-9, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 5111-65-9, Name is 2-Bromo-6-methoxynaphthalene, SMILES is C1=C2C(=CC=C1OC)C=C(Br)C=C2, belongs to ethers-buliding-blocks compound. In a article, author is Lokachari, Nitin, introduce new discover of the category.

An experimental and kinetic modeling study of cyclopentane and dimethyl ether blends

Cyclopentane is a suitable naphthene, or cycloalkane, in a palette for multi-component gasoline surrogate fuels due to its presence in market fuels and its relevance to alkyl substituted cyclopentanes also present. However, the previous oxidation studies of cyclopentane have primarily focused on neat mixtures. Blending cyclopentane with dimethyl ether in this work therefore serves to inform our understanding of, and improve predictive models for, multi-component mixtures. In this work, the auto-ignition of cyclopentane/dimethyl ether blends was studied in a high-pressure shock tube and in a rapid compression machine. A wide range of temperatures (650 – 1350 K) and elevated pressures of 20 and 40 bar were studied at equivalence ratios of 0.5, 1.0 and 2.0 in air for two blending ratios (30/70 and 70/30 mole% cyclopentane/di-methyl ether mixtures). A detailed kinetic model for cyclopentane was revised to capture the measured ignition delay times and apparent heat release rates in this study. Literature ignition delay time, jet-stirred reactor, and laminar burning velocity measurements of neat cyclopentane were used as additional validation. Improvements to the kinetic model were based on recent literature studies related to sub-models including cyclopentene and cyclopentadiene which allowed the removal of previous local rate-constant optimizations. Low temperature reactivity of cyclopentane was found to be controlled by the branching ratio between concerted elimination of HO2 and the strained formation of. QOOH radicals in agreement with previous studies. In this study, the low branching ratio of.QOOH formation increases the influence of a competing consumption pathway for cyclopentyl-peroxy (CPTO(2)J) radicals. The sensitivity of the simulated ignition delay times to the formation of cyclopentyl hydroperoxide (CPTO2H), from CPTO(2)J and HO2, is discussed. The current model is used to analyze the influence of dimethyl ether on the reactivity of cyclopentane in the context of previous literature studies of dimethyl ether binary blends with ethanol and toluene. (C) 2020 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Application of 5111-65-9, 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 5111-65-9.

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Kobayashi, Ryo, once mentioned the application of 20059-73-8, Name is 2-(4-(Aminomethyl)phenoxy)-N,N-dimethylethanamine, molecular formula is C11H18N2O, molecular weight is 194.27, MDL number is MFCD01075231, category is ethers-buliding-blocks. Now introduce a scientific discovery about this category, Product Details of 20059-73-8.

Cleavage of C-O and C-H bonds in ethers by a genuine Si=O bond

An isolable three-coordinate dialkylsilanone without substantial electronic stabilization reacts with several ethers resulting in the cleavage of the C-O or C-H and C-O bonds in the ethers which have not been observed for the hitherto-known electronically stabilised isolable Si=O species. The formation of the Lewis base (DMAP and MTHP) complexes of the dialkylsilanone and the DFT calculations elucidated that the coordination of the ethereal oxygen atom to the Lewis acidic Si atom of the genuine Si=O bond is a key interaction for the reaction.

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Electric Literature of 5111-65-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 5111-65-9, Name is 2-Bromo-6-methoxynaphthalene, SMILES is C1=C2C(=CC=C1OC)C=C(Br)C=C2, belongs to ethers-buliding-blocks compound. In a article, author is Hu, Fengshuo, introduce new discover of the category.

Epoxidized soybean oil modified using fatty acids as tougheners for thermosetting epoxy resins: Part 1

A series of bio-rubber (BR) reactive tougheners for thermosetting epoxy resins was prepared by grafting renewable saturated fatty acids of different chain lengths (C6-C14) onto epoxidized soybean oil (ESO) at varying molar ratios. The tunable nature of the BR systems derives from the architecture and functionality of naturally occurring molecules. Control of BR reactivity and molecular weight by varying the degree of grafting and the chain length of the fatty acid was demonstrated. The BR-toughened samples were prepared by blending BRs with diglycidyl ether of bisphenol A (DGEBA), Epon 828, and stoichiometrically curing the mixture using an aromatic amine hardener, diethyl toluene diamine (Epikure W). Fracture surface morphology studies showed that tuning of phase separated particle sizes was possible depending on the BR type and weight fraction. The resulting toughening effect was evaluated by measuring the fracture toughness of control and toughened polymer samples. The use of BRs significantly improved the critical strain energy release rate and critical stress intensity factor values of thermosetting polymer samples without significantly reducing T-g and modulus. In addition to toughening and adding renewable content to petroleum-based thermosetting epoxy systems these new tougheners have low viscosity compared to common alternatives and aid ease of processing.

Electric Literature of 5111-65-9, 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 5111-65-9.

In an article, author is Feng, Hongru, once mentioned the application of 101-55-3, Name is 1-Bromo-4-phenoxybenzene, molecular formula is C12H9BrO, molecular weight is 249.1033, MDL number is MFCD00000094, category is ethers-buliding-blocks. Now introduce a scientific discovery about this category, Product Details of 101-55-3.

Occurrence and spatial distribution of legacy and novel brominated flame retardants in seawater and sediment of the South China sea

The occurrence and spatial distribution of polybrominated diphenyl ethers (PBDEs) and novel brominated flame retardants (NBFRs) in seawater and surficial sediment samples (N = 19 and 45, respectively) from the South China Sea (SCS) in 2018 were investigated, and the correlation between BFRs and site parameters (total organic carbon, depth, etc.) were assessed by principal component analysis. The concentration ranges of Sigma PBDEs in seawater and sediments were 0.90-4.40 ng/L and 0.52-22.67 ng/g dry weight (dw), respectively, while those of Sigma NBERs were 0.49-37.42 ng/L and 0.78-82.29 ng/g dw, respectively. BDE-209 and decabromodiphenyl ethane were the predominant BFRs, accounting for 38.65% and 36.94% in seawater and 26.71% and 68.42% in sediments, respectively. Notably, tris(2,3-dibromopropyl)isocyanurate and 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine, seldomly detected in aquatic matrices worldwide, were detected for the first time in the study area, and their relatively high levels and detection frequencies indicate the ubiquitous application of these NBFRs in the Pearl River Delta. Zhuhai and Jiangmen are the main sources of NBFRs in the SCS. Preliminary risk assessment on NBFRs using hazard quotient indicates low to medium risks to marine organisms at some sites. The occurrence of NBFRs in the SCS highlights the prioritization of more toxicological information on these compounds. (C) 2020 Elsevier Ltd. All rights reserved.

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In an article, author is Wankowski, James L., once mentioned the application of 150-78-7, Application In Synthesis of 1,4-Dimethoxybenzene, Name is 1,4-Dimethoxybenzene, molecular formula is C8H10O2, molecular weight is 138.16, MDL number is MFCD00008401, category is ethers-buliding-blocks. Now introduce a scientific discovery about this category.

Ionic liquid (IL) cation and anion structural effects on the extraction of metal ions into N-alkylpyridinium-based ILs by a macrocyclic polyether

Previous studies of the effect of IL cation/anion hydrophobicity and the nature of the aqueous phase anion on the partitioning of alkali and alkaline earth cations between an acidic aqueous phase and 1,3-dialkylimidazolium-based or quaternary ammonium-based ILs in the presence of a crown ether have revealed significant similarities between the behavior of the two IL families. To further explore the generality of these observations and their potential application in the rational design of ILs for use as replacements for the molecular diluents typically employed as extraction solvents, the extraction of several metal ions (Na+, Sr2+ and Ba2+) from nitric and hydrochloric acid solutions by dicyclohexano-18-crown-6 (DCH18C6) into a series of N-alkylpyridinium-based ILs (C-n-pyr(+) ILs) has been studied. Although much of the extraction behavior observed in these systems is consistent with that seen for the 1,3-dialkylimidazolium and quaternary ammonium-based ILs, certain observations, in particular the effect of IL cation hydrophobicity on divalent metal ion extraction from HNO3 by N-alkylpyridinium-ILs bearing long (dodecyl- and tetradecyl-) alkyl chains, cannot be fully explained by the established three-path model for metal ion partitioning. Instead a complete description of metal ion extraction in these systems requires consideration of the aggregation of the IL cation in the aqueous phase. The effects of this aggregation on the efficiency and selectivity of metal ion extraction into C-n-pyr(+) ILs by the crown ether are systematically explored.

If you are interested in 150-78-7, you can contact me at any time and look forward to more communication. Application In Synthesis of 1,4-Dimethoxybenzene.

In an article, author is Zhang, Hang, once mentioned the application of 93-04-9, Name is 2-Methoxynaphthalene, molecular formula is C11H10O, molecular weight is 158.2, MDL number is MFCD00004061, category is ethers-buliding-blocks. Now introduce a scientific discovery about this category, Name: 2-Methoxynaphthalene.

Inhibitory effects of functionalized polycarboxylate retarder on aberrant thickening phenomena of oil well cement at high temperature

Aberrant thickening of cement slurry caused by polycarboxylate retarders mainly refers to abnormal gelation and thickening time reversal (TTR) when temperature reaches above 120 degrees C. These phenomena would directly jeopardize cementing operation and hinder the application of polycarboxylate retarders in oil and gas exploitation. Herein, two functionalized polycarboxylate retarders were synthesized to overcome the challenges in complex conditions. The incorporation of isoprenyl oxy poly(ethyleneglycol) ether (TPEG) and [3-(methacryloylamino) propyl] trimethyl ammonium chloride (MAPTAC) was capable of preventing unfavorable crosslinking and chelation reaction between cement grains and polymer, thereby avoiding abnormal gelation. It was also found that the hydrophobic association behavior of long side chain in TPEG could cause the gradual release of carboxyl groups at elevated temperature, which was unfavorable for TTR inhibition. When the TPEG was replaced by N-Vinyl-2-Pyrrolidinone (NVP), its retarding effect gradually weakened when temperature rose from 130 degrees C to 150 degrees C, and excellent inhibition of TTR was achieved. (C) 2020 Elsevier Ltd. All rights reserved.

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Related Products of 645-36-3, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 645-36-3, Name is 2,2-Diethoxyethanamine, SMILES is CCOC(OCC)CN, belongs to ethers-buliding-blocks compound. In a article, author is Garcia, Antonio, introduce new discover of the category.

Methanol and OMEx as fuel candidates to fulfill the potential EURO VII emissions regulation under dual-mode dual-fuel combustion

Recent investigations show that there are different combustion strategies that promise to achieve higher efficiencies in internal combustion engines. Advanced combustion modes such as reactivity controlled compression ignition (RCCI) and dual-mode dual-fuel (DMDF) have proven to be able to achieve low NOx and soot engine-out emissions while being able to operate over the complete engine map. On another front, intensive research has been done in the fuels field. Oxygenated fuels, like oxymethylene dimethyl ethers (OMEx) and methanol, are of special interest because of their potential to reduce the soot emissions, while allowing to adjust parameters, such as EGR, to higher values to also reduce NOx emissions and avoid other problems like excessive in-cylinder peaks of pressure. In this research, the effects of diesel-methanol and OMEx-gasoline fuels were studied on a dual-mode dual-fuel (DFDM) multi-cylinder engine at 1800 rpm for various loads (25, 50, 80 and 100%). To do so, a dedicated calibration to optimize the brake thermal efficiency while trying to maintain NOx and soot emissions under EURO VI limitations was applied. Then, the combustion characteristics, performance and emissions results are compared to a base diesel-gasoline case. Boundary conditions (intake pressure, temperature and air mass) for each fuel combination where similar, with the exception of the premixed energy ratio, which was on average 20% lower for diesel-methanol. Each fuel combination was, weighted against each other by means of an merit function, where the fuel combination with the lowest value has the closest approximation to ideal BSFCeq, BSNOx, BSSoot, BSCO and BSHC targets. Results show that diesel-methanol presents no significant differences with respect to diesel-gasoline in terms of equivalent BSFCeq and NOx, while the substitution of diesel by OMEx in the dual-mode dual-fuel combustion has the potential of, although penalizing HC and CO emissions, not only achieving the EURO VI NOx (0.4 g/kWh) limits but also the future potential EURO VII (0.2 g/kWh) as well because of a negligible soot production that allows using EGR levels of up to 50%.

Related Products of 645-36-3, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 645-36-3 is helpful to your research.

Chemistry, like all the natural sciences, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, begins with the direct observation of nature¡ª in this case, of matter.143-24-8, Name is 2,5,8,11,14-Pentaoxapentadecane, SMILES is COCCOCCOCCOCCOC, belongs to ethers-buliding-blocks compound. In a document, author is Ghule, Balu, introduce the new discover.

Separation and quantification of lupeol in Hygrophila schulli by high-performance thin-layer chromatography

Lupeol is the main active constituent of Hygrophila schulli (HS) plant. A simple, reliable and reproducible method of quantification is needed for the quality control of HS. Therefore, high-performance thin-layer chromatography (HPTLC) method was established for determining lupeol in HS roots and aerial parts. The laboratory isolated and identified (by UV, FT-IR, 1H- and 13C-NMR and MS) lupeol from HS roots was used to develop the proposed method. The method was validated in terms of linearity, limits of detection and quantification, stability, precision, accuracy and robustness studies. Aluminum-backed HPTLC plates precoated with silica gel 60F(254) were used as the stationary phase and benzene-chloroform-methanol (93:5.75:1.25, V/V) as the optimized mobile phase. Post-chromatographic derivatization was done with anisaldehye-H2SO4 reagent, and the chromatograms were scanned using CAMAG TLC Scanner III at 540 nm. The linear regression analysis data for the calibration plots of lupeol showed good linearity relationship with y = 7.1841x + 751.42 (r(2) = 0.9979) regression equation in the concentration range of 200-1000 ng band(-1) (R-F = 0.43 +/- 0.02). Mean +/- SD values of slope and intercept were 7.1840 +/- 0.067 and 751.42 +/- 45.50, respectively. The stability study suggested that lupeol in chloroform was stable within 24 h at room temperature (%RSD = 1.07). The average percentage recovery of lupeol from the petroleum ether extracts of HS roots and aerial parts was 98.66 +/- 0.65 and 98.77 +/- 0.39, respectively, with a % w/w content 5.02 +/- 0.23 and 0.39 +/- 0.11% w/w on dry weight basis. The limits of detection and quantification were found to be 17.85 and 54.11, respectively.

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 143-24-8. Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 5111-65-9, Name is 2-Bromo-6-methoxynaphthalene, molecular formula is C11H9BrO, belongs to ethers-buliding-blocks compound. In a document, author is Guan, Shengjie, introduce the new discover, Name: 2-Bromo-6-methoxynaphthalene.

Preparation of in-situ grown carbon nanotubes via dithiocarbamate in composites with excellent microstructure and mechanical performance

Dithiocarbamate binding to nickel was successfully synthesized on the surface of carbon fibers acting as the catalyst of carbon nanotubes via two feasible strategy, including typical one-step method with metal hydroxide and green mild Markovnikov addition procedure using ethyl vinyl ether. The positive effects of modified carbon fibers were investigated, consisting of microstructure, roughness, and surface energy, etc. Further, carbon fiber composites with carbon nanotubes grown in-situ were prepared by combining methylphenyl silicone and phenolic resin, then undergoing a hyperthermal sintering process. The surface morphologies proved that the microstructure of composites changed dramatically due to substantial carbon nanotube whiskers. Furthermore, the mechanical performance of high temperature treated composite materials with higher modulus and strength had been enhanced, which the compressive strength and interlaminar shear strength could reach approximately 20 MPa (further up to 150%) and 10 MPa (120%). The modification of carbon fibers and growth of CNTs in-situ would contribute to competitive application of resin-based composites in the field of thermal bearing and insulation.

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 5111-65-9. Name: 2-Bromo-6-methoxynaphthalene.