Ethers-buliding-blocks

Wang, Qin published the artcileTheoretical investigations on the cycle performance of a single-pressure diffusion absorption heat transformer with LiBr-H2O-R134a-TEGDME, COA of Formula: C10H22O5, the main research area is LiBr water tetrafluoroethane TEGDME pressure diffusion absorption heat transformer.

A simulation model using the first thermodn. law is first proposed to estimate the performance of diffusion absorption heat transformer, which could potentially improve energy utilization efficiency and reduce CO2 emission. Thermodn. analyses are performed to investigate the cycle performance when H2O is employed as refrigerant, LiBr as absorbent for H2O, R134a as diffusion gas and TEGDME as absorbent for R134a. Analyses aim to optimize system COP under specified temperature of two generators, two absorbers, evaporator and condenser, and compare the influence of the six temperatures on COP. The results under design conditions show that larger generation efficiency of R134a and smaller mass fraction of LiBr in H2O-LiBr solution are beneficial to COP improvement, but they are limited by the operating conditions. There is an optimal ratio of H2O-LiBr solution mass flow rate to R134a mass flow rate for an optimal COP, and the optimal ratio decreases with the increase of LiBr mass fraction in H2O-LiBr solution The highest COP of 0.1701 is reached with the optimal ratio of 1.743. In addition, under design-off conditions, the temperatures of refrigerant generator and evaporator have the greatest influence on COP while the temperature of diffusion gas generator has the least influence. The diffusion absorption heat transformer will provide a new way to lift temperature of low grade heat without electricity input which can further improve the energy utilization efficiency and reduce the CO2 emission.

Journal of Cleaner Production published new progress about Absorbents. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, COA of Formula: C10H22O5.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Nagumo, Ryo published the artcileCorrelation between Macroscopic Diffusion Rates and Microscopic Interactions in Ethylene Glycol-Based Solvents, Related Products of ethers-buliding-blocks, the main research area is diffusion residence time ethylene glycol based solvent MD simulation.

An evaluation of mol. interactions is important for estimating macroscopic properties, such as solubility and diffusivity. In this study, for several types of ethylene glycol-based absorbents, we discuss the correlation between a macroscopic property (mol. diffusivity) and a microscopic criterion (residence time) using mol. dynamics simulations for pure solvent systems and CO2-loaded solvent systems. The neg. correlations between the diffusivity and the residence time can be divided into categories, depending on the number of constituent hydroxy groups of the solvent mols. The disparity between the categories arises from whether hydrogen bonding can be formed between the solvent mols. This study leads to the systematic estimation of the mol. diffusivity from the theor. prediction of the residence time. We believe that the residence time is suitable as a criterion to evaluate macroscopic properties.

Industrial & Engineering Chemistry Research published new progress about Absorbents. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Ram, Siya published the artcileSynthesis of potential antifilarial agents. 2. Methyl 2-substituted purine 8-carbamates and related compounds, Quality Control of 622-86-6, the main research area is purinecarbamate preparation inactive filaricide; methoxycarbonylthioureidopyrimidine preparation inactive filaricide.

Purinecarbamates I [R = (un)substituted alkyl, benzyl] were prepared from 2-mercapto-4,5-pyrimidinediamine. Some methoxycarbonylthioureidopyrimidines were also prepared The compounds were tested against the filarial infection, Brugia pahangi, in Meriones ungericulatus malis. None of the compounds demonstrated antifilarial activity.

Journal of Heterocyclic Chemistry published new progress about Filaricides. 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Quality Control of 622-86-6.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kumaresan, R. published the artcileSynthesis and evaluation of N,N-di-alkyl-2-methoxyacetamides for the separation of U(VI) and Pu(IV) from nitric acid medium, Category: ethers-buliding-blocks, the main research area is preparation methoxyacetamide extractant uranium plutonium fuel reporcessing.

The homologs of N,N-di-alkyl-2-methoxyacetamides (DAMeOA) having three different alkyl chains varying from hexyl to decyl (C6, C8 and C10) were synthesized and characterized by NMR and IR spectral analyses. Extraction behavior of U(VI) and Pu(IV) from nitric acid medium in a solution of 0.5 M of DAMeOA in n-dodecane (n-DD) was studied and the results were compared with those obtained using N,N-di-hexyloctanamide (DHOA) in n-dodecane. The effect of various parameters on the distribution ratio of U(VI) and Pu(IV) in DAMeOA was studied. The extraction of nitric acid increased with decrease in chain length of alkyl group attached to amidic nitrogen atom of DAMeOA and the conditional nitric acid extraction constant was determined The extraction of nitric acid in DAMeOA/n-DD resulted in the formation of third phase in organic phase and the third phase occurred early with DAMeOA having smaller alkyl chain length. In contrast to this, the distribution ratio (D) of U(VI) and Pu(IV) in DAMeOA/n-DD increased with increase in the concentration of nitric acid and with increase in the chain length of alkyl group attached to amidic nitrogen atom of DAMeOA. The stoichiometry of the metal – solvate was determined from the slope of extraction data. Quant. recovery of uranium and plutonium from the loaded organic phase was achieved using dilute nitric acid.

Radiochimica Acta published new progress about Extractants. 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Category: ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Yang, Huibin published the artcileDesign and synthesis of thiazolylhydrazone derivatives as inhibitors of chitinolytic N-acetyl-β-D-hexosaminidase, Related Products of ethers-buliding-blocks, the main research area is thiazolylhydrazone derivative acetylhexosaminidase inhibitor mol docking.

N-acetyl-β-D-hexosaminidase (Hex) is potential target for pesticide design. Here, a series of thiazolylhydrazone derivatives were designed, synthesized and evaluated as competitive inhibitors of OfHex1, a Hex from the agricultural pest Ostrinia furnacalis. The derivative 3k, with a (benzyloxy)methyl group at the N3 atom, demonstrated greater potency with a Ki of 10.2 μM. Mol. docking anal. indicated that the (benzyloxy)methyl group of 3k was bound to a previously unexplored pocket formed by Loop 478-496. Then further optimization around naphthalene ring led to find the more potency substituent Ph. The derivative 7, with phenoxyethyl group at R1 and a Ph group at R2, demonstrated an augmented potency with a Ki of 2.1 μM. Mol. docking anal. indicated that 7 was bound to the active pocket of OfHex1 more favorably than 3k. This work suggests a novel scaffold for developing specific Hex inhibitors.

Bioorganic & Medicinal Chemistry published new progress about Drug design. 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Dorai, Arunkumar published the artcileVisualization of polysulfide dissolution in lithium-sulfur batteries using in-situ NMR microimaging, Quality Control of 143-24-8, the main research area is lithium sulfur battery magnetic resonance imaging.

Lithium-sulfur batteries offer the highest theor. energy d. among enclosed rechargeable batteries. However, there are various issues that need to be addressed before their practical adoption, such as the dissolution of intermediate lithium polysulfides (Li2Sn) into the electrolyte solution, which causes rapid degradation of the battery. Herein, we used NMR (NMR) and in-situ magnetic resonance imaging (MRI) to visualize the dissolution of the intermediate species formed during the discharge-charge process in Li-S batteries. A strong enhancement in the MRI signal was observed when the cell was first discharged, which is associated with the dissolution of intermediate polysulfides. To determine the origin of this signal enhancement, 1H NMR spectra, T1 relaxation time, and ESR (ESR) measurements were performed on electrolyte containing polysulfides. The origin of the strong enhancement of the MRI signal by the dissoluted polysulfides is mainly attributed to the paramagnetic interaction due to the formation of S*-3 and S*-4 radicals in the dissoluted polysulfides. The results demonstrate that 1H MRI is an indirect and effective way to study and visualize the intermediate species formed during Li-S battery operation.

Electrochemistry Communications published new progress about Dissolution. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Quality Control of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Jozwiak, Malgorzata published the artcileCompression of selected glymes in N,N-dimethylformamide + water. The hydration numbers and hydrophobic hydration process of glymes, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is glyme DMF water hydrophobic hydration number compression process.

This paper presents the speed of sound in selected glymes (monoglyme, diglyme, triglyme and tetraglyme) in N,N-dimethylformamide + water mixed solvent at four temperatures: 293.15 K, 298.15 K, 303.15 K and 308.15 K. The data obtained were used to calculate the values of isentropic compressibility (κS) of glymes solutions and apparent molar isentropic compression (KS,Φ,m), as well as the limiting partial molar isentropic compression (K0S,m) of glymes in the mixed solvent (DMF + W). Changes in the obtained values of the physicochem. parameters, as functions of temperature or mole fraction of water in the mixed solvent, were analyzed in terms of the mol. interactions and structural differentiation of the investigated systems. The hydrophobic hydration process of the studied glymes is visible in the high water content area of the mixed solvent. The hydration number of glymes in water at four temperatures was calculated and analyzed.

Journal of Molecular Liquids published new progress about Compression. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Robba, A. published the artcileFingerprinting Mean Composition of Lithium Polysulfide Standard Solutions by Applying High-Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium sulfur battery polysulfide solution x ray absorption spectroscopy.

In a lithium/sulfur (Li/S) battery, the reduction of sulfur during discharge involves a particular mechanism, where the active material successively dissolves into the electrolyte to form lithium polysulfide intermediate species (Li2Sx), with x being a function of the state of charge. In this work, sulfur K-edge resonant inelastic X-ray scattering measurements were performed for the characterization of different Li2Sx polysulfide standard solutions High-energy resolution fluorescence detected X-ray absorption spectroscopy allowed clear separation the pre-edge absorption peak corresponding to terminal sulfur atoms from the main absorption peak due to internal atoms and allowed quant. evaluation of the evolution of the peak area ratio as a function of the polysulfide chain length. Results of this exptl. work demonstrate that the normalized area of the pre-edge is a reliable fingerprint of the Li2Sx mean chain length in agreement with recent theor. predictions. As a perspective, this work confirms that operando HERFD XAS can be used to differentiate mean polysulfide composition, which is key issue in the characterization of Li/S cells.

Journal of Physical Chemistry Letters published new progress about Composition. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Safety of 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Stjerndahl, Maria published the artcileCleavable Surfactants: A Comparison between Ester, Amide, and Carbonate as the Weak Bond, Name: 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is ester amide carbonate hydrolysis gemini cleavable surfactant property.

Cleavable surfactants, i.e., surfactants in which a weak bond has deliberately been inserted into the mol., are of interest when remaining surface-active material at a surface can cause problems. Ester and amide bonds are established as week linkages in surfactants but these generate an acid when they hydrolyze. For some applications, acidic degradation products are unwanted. Surfactants with a carbonate bond between the polar headgroup and the hydrophobic tail are of interest for such purposes. In this article, we compare the phys.-chem. properties of nonionic carbonate surfactants with those of the corresponding ester and amide surfactants. The half-lives of the different cleavable surfactants are also compared and it was found that a carbonate bond is slightly more stable to alk. hydrolysis than an ester bond when present in otherwise identical structures. A nonionic gemini surfactant with a carbonate bond in the spacer, which on hydrolysis decomposes into two identical single-tailed nonionic amphiphiles, is also presented. The hydrolysis kinetics for this surfactant was studied in some detail and it was found that it degrades much faster at low temperature than at higher temperature This anti-Arrhenius type of hydrolysis kinetics is proposed to be due to the reverse solubility vs. temperature behavior of ethoxylated surfactants.

Journal of Surfactants and Detergents published new progress about Cloud point. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Name: 2,5,8,11-Tetraoxatridecan-13-ol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Li, Jia published the artcileBoron-doped carbon microspheres as a new catalyst for rechargeable Li-CO2 batteries, Synthetic Route of 143-24-8, the main research area is boron doped carbon microsphere lithium battery electrochem property.

Li-CO2 batteries are thought to be a promising technol. for it can combine storing energy with mitigating the “”greenhouse effect””. However, CO2 electrochem. reduction reaction is known to be a kinetically sluggish one. Therefore, researchers are committed to exploring catalysts with high catalytic activity to drive the reaction. In this study, boron-doped carbon microspheres (B-CMs) with mesoporous structure and large sp. surface area were prepared using one-step impregnation followed by calcination. Active sites are increased by the pos. charged boron atoms in B-CMs, thus, endowing higher catalytic performance for Li-CO2 batteries. The Li-CO2 battery with B-CMs cathode exhibited excellent performance, delivering a high discharge capacity of 17,429 and 11,975 at the c.d. of 200 and 500 resp., and can stably run 90 cycles at the c.d. of 200 with a limited capacity of 1000.

Fullerenes, Nanotubes, and Carbon Nanostructures published new progress about Calcination. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Synthetic Route of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem