Tag: M.W=200-250

Barannikov, Vladimir P. published the artcileEffect of Solvent Polarity on Enthalpies of Solvation of Ethylene Oxide Oligomers, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is solvent polarity effect solvation enthalpy ethylene oxide oligomer.

The enthalpies of dissolution, ΔsolHm∞, and solvation, ΔsolvHm∞, of ether oligomers CH3O(CH2CH2O)nCH3 (n = 1-4) in Et acetate, pyridine, N,N-dimethylformamide, and acetonitrile have been determined from calorimetric measurements at 298.15 K. The values of group contributions of repeated ether units and monoether fragment have been compared on the basis of the additive method. The contributions of ether group to ΔsolvHm∞ for oligomeric and monomeric mols. coincide within their uncertainties for solutions in highly polar solvents, in contrast to non-polar, moderately polar, and H-bonding solvents. The dependence of ether group contributions to ΔsolvHm∞ on the electron pair acceptance index of solvents ETN has been considered.

Journal of Chemical & Engineering Data published new progress about Evaporation enthalpy. 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

Singh Syali, Mohanjeet published the artcileStudies on a novel Na+ superionic conducting polymer gel cocktail electrolyte membrane immobilizing molecular liquid mixture of carbonates, tetraglyme and ionic liquid, Quality Control of 143-24-8, the main research area is superionic conducting polymer gel carbonates tetraglyme ionic liquid.

Novel Na+ superionic conducting polymer gel cocktail electrolyte membranes immobilizing mol. liquid mixture of carbonates, tetraglyme and ionic liquid have been prepared by solution cast method. The optimized free standing electrolyte membrane offers ionic conductivity of 3.3 x 10-3 S cm-1 and sodium-ion transport number of 0.31 at ambient temperature The detailed ion-dynamics have been investigated with the help of frequency dependent dielec. and modulus studies. The possible interaction of these mol. liquids with sodium tetrafluoroborate salt and poly(vinylidiene fluoride-hexafluoropropylene) polymer host is investigated by FTIR studies. The DSC study confirms that the electrolyte system maintains the gel phase up to ∼ 120°C. The linear sweep voltammetry reveal the working voltage range offered by the electrolyte system to be 3.46 V. The Elec. double layer capacitor (EDLC) cell with optimized electrolyte membrane and electrodes of activated carbon demonstrate the specific discharge capacity of ∼ 60F g-1 and drops negligibly with cycle number The reported Na+ superionic conducting cocktail electrolyte system can be utilized as an electrolyte while fabricating electrochem. devices especially the EDLCs.

Journal of Molecular Liquids published new progress about Carbonates Role: PEP (Physical, Engineering or Chemical Process), PROC (Process). 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

Walus, Sylwia published the artcileElectrochemical impedance spectroscopy study of lithium-sulfur batteries: Useful technique to reveal the Li/S electrochemical mechanism, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is electrochem impedance lithium sulfur battery.

Electrochem. impedance spectroscopy (EIS) study was done to go deeper into the electrochem. processes of Li/S battery in a common CR2032 coin-type cell. To sep. the contributions of each electrode (i. e. Li neg. electrode and S composite pos. electrode), impedance measurements on sym. cells consisting of two previously cycled electrodes was used. This methodol. enables to propose an overall interpretation of the different electrochem. phenomena present during cycling. Low temperature tests were also applied, which brought fruitful information concerning the kinetics of the reactions and allowed to confirm the chem.-phys. interpretations performed on the cell cycled at 25°.

Electrochimica Acta published new progress about Carbon fibers, fabrics Role: TEM (Technical or Engineered Material Use), USES (Uses). 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Name: 2,5,8,11,14-Pentaoxapentadecane.

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

Carreras, Lucas published the artcileSelective functionalisation of aromatic alcohols with supramolecularly regulated gold(I) catalysts, Recommanded Product: 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is hydroxyaryl carbonyl derivative preparation gold catalyst; aromatic alc diazo ester carbon hydrogen insertion reaction.

Phosphite-based Au(I) catalytic systems containing an array of structurally diverse polyether-based regulation sites were designed and synthesized. These catalysts have been successfully tested in the Au(I)-catalyzed C-H functionalization of phenols and related derivatives with gold-carbenes derived from diazo compounds Regulation of the steric congestion around the catalytic Au(I) center via ion-dipole interactions with an external regulation agent led to an enhancement of both the activity and selectivity of the reaction. This new approach in supramol. gold(I) catalysis has been applied to the derivatisation of an array of substituted phenols and related substrates and to the preparation of an advanced synthetic intermediate of the anticancer agent tamoxifen. The effects of the regulation agent on the selectivity and yield of the reaction have been studied and rationalised using DFT-D calculations

Organic Chemistry Frontiers published new progress about Aromatic alcohols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Recommanded Product: 2,5,8,11-Tetraoxatridecan-13-ol.

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

Mao, Wuyu published the artcileOrganocatalytic and Scalable Syntheses of Unsymmetrical 1,2,4,5-Tetrazines by Thiol-Containing Promotors, Synthetic Route of 23783-42-8, the main research area is tetrazine derivative preparation; nitrile heterocyclization olefination; annulations; heterocycles; nitriles; organocatalysis; synthetic methods.

Despite the growing application of tetrazine bioorthogonal chem., it is still challenging to access tetrazines conveniently from easily available materials. Described here is the de novo formation of tetrazine from nitriles and hydrazine hydrate using a broad array of thiol-containing catalysts, including peptides. Using this facile methodol., the syntheses of 14 unsym. tetrazines, containing a range of reactive functional groups, on the gram scale were achieved with satisfactory yields. Using tetrazine methylphosphonate as a building block, a highly efficient Horner-Wadsworth-Emmons reaction was developed for further derivatization under mild reaction conditions. Tetrazine probes with diverse functions can be scalably produced in yields of 87-93 %. This methodol. may facilitate the widespread application of tetrazine bioorthogonal chem.

Angewandte Chemie, International Edition published new progress about Heterocyclization. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Synthetic Route of 23783-42-8.

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

Li, Longjia published the artcileAmphiphilic ligands for Cu-catalyzed aerobic oxidation to synthesize 9-fluorenones in water, Related Products of ethers-buliding-blocks, the main research area is fluorenone preparation; fluorene aerobic oxidation copper catalyst.

A series of amphiphilic PEG-functionalized nitrogen ligands were developed for the highly efficient copper-catalyzed aerobic oxidation of 9-fluorenes, with mol. oxygen as the sole oxidant in neat water to afford 9-fluorenones I [R = H, 2-NH2, 2-I, etc.]. A broad range of functional groups were well tolerated and thus offered the opportunity for further functionalization.

Catalysis Communications published new progress about Oxidation. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Related Products of ethers-buliding-blocks.

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

Zheng, Ruixin published the artcileOxygen vacancy engineering of vertically aligned NiO nanosheets for effective CO2 reduction and capture in Li-CO2 battery, Computed Properties of 143-24-8, the main research area is oxygen vacancy vertically aligned nickel oxide nanosheet; carbon dioxide reduction capture lithium battery.

The Li-CO2 battery with the concept of turning waste into treasure has aroused great scientific research enthusiasm recently, but unfortunately it is a long shot for the large-scale applications of Li-CO2 battery due to its huge overpotential and poor cycling life at current stage. Herein, NiO nanosheets engineered by O vacancy growing vertically on C clothes (NiO-Vo@CC) was developed as viable catalyst for both CO2 reduction reaction (CO2RR) and CO2 evolution reaction (CO2ER) in Li- CO2 system. The O vacancy decorated by surplus electron will not only work as electron donor (Lewis base) surface to activated the electron-deficient C atom in CO2 but also narrow the band gap of NiO, therefore optimized CO2 conversion kinetic can be obtained by using defective NiO-Vo@CC electrode. The use of defect engineering to achieve performance improvement in aprotic Li-CO2 battery is still in its infancy at current stage and thus the authors’ research initially corroborates that modulation of the surface property via defect engineering can serve as valid strategy to design high performance electrodes for Li-CO2 battery.

Electrochimica Acta published new progress about Crystal vacancies (oxygen). 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Computed Properties of 143-24-8.

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

Benkovics, Tamas published the artcileDiverse Catalytic Reactions for the Stereoselective Synthesis of Cyclic Dinucleotide MK-1454, Quality Control of 143-24-8, the main research area is transition metal thiophosphate enzyme catalytic stereoselective synthesis cyclization nucleotide; STING gene agonist cyclic dinucleotide MK1454 stimulator thiophosphate fluorination.

As practitioners of organic chem. strive to deliver efficient syntheses of the most complex natural products and drug candidates, further innovations in synthetic strategies are required to facilitate their efficient construction. These aspirational breakthroughs often go hand-in-hand with considerable reductions in cost and environmental impact. Enzyme-catalyzed reactions have become an impressive and necessary tool that offers benefits such as increased selectivity and waste limitation. These benefits are amplified when enzymic processes are conducted in a cascade in combination with novel bond-forming strategies. In this article, we report a highly diastereoselective synthesis of MK-1454, a potent agonist of the stimulator of interferon gene (STING) signaling pathway. The synthesis begins with the asym. construction of two fluoride-bearing deoxynucleotides. The routes were designed for maximum convergency and selectivity, relying on the same benign electrophilic fluorinating reagent. From these complex subunits, four enzymes are used to construct the two bridging thiophosphates in a highly selective, high yielding cascade process. Critical to the success of this reaction was a thorough understanding of the role transition metals play in bond formation.

Journal of the American Chemical Society published new progress about Cyclization. 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

Klepel, Florian published the artcilePhoto-responsive host-guest complexation directs dynamic covalent condensation of phenyl boronic acid and D-fructose, Application In Synthesis of 23783-42-8, the main research area is photoresponsive host guest complexation directs dynamic covalent condensation; dynamic combinatorial libraries mol recognition; dynamic covalent system responds rapidly conformation change.

Inspired by the way templates have been used to drive dynamic combinatorial libraries by mol. recognition, we exploited the photo-responsive host-guest interaction of an azo-based photoswitch with permethylated cyclodextrin to reversibly manipulate the dynamic covalent interaction of a Ph boronic acid and D-fructose by irradiation with light.

Chemical Communications (Cambridge, United Kingdom) published new progress about Azo compounds, aromatic Role: PEP (Physical, Engineering or Chemical Process), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Application In Synthesis of 23783-42-8.

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

Ren, Muqing published the artcileBioinspired Redox Mediator in Lithium-Oxygen Batteries, SDS of cas: 143-24-8, the main research area is superoxide dismutase biomimetic redox mediator activated charcoal.

LiO2 is an intermediate formed in aprotic Li-O2 and Li-air batteries during an oxygen reduction reaction (ORR). The soluble LiO2 triggers undesirable side reactions, such as a nucleophilic reaction and the formation of the byproduct Li2CO3 upon reaction with the electrolyte and substrate, resulting in irreversible redox reactions and causing a low Coulombic efficiency with poor cycling durability. Inspired by superoxide dismutase (SOD) in biol. systems, we hypothesized that SOD mimetics could likewise be applied in Li-O2 and Li-air batteries, thereby prolonging the battery cycle life. Oxidized activated charcoal (OAC) is known to be one SOD mimetic with fast kinetics and a high turnover. Therefore, OAC was added to a dual polymer gel electrolyte as a redox mediator. The OAC redox mechanism is well illustrated in quasi-solid Li-O2 batteries, and the battery stability was significantly improved in the presence of OAC. Furthermore, the best Li-O2 battery containing OAC demonstrated stable galvanostatic charge/discharge performance for ~300 cycles (3000 h) with a cutoff capacity of 0.4 mAh cm-2. In addition, under a discharge cutoff potential of 2.0 V, the discharge capacity of the best Li-O2 battery is ~37.0 mAh cm-2.

ACS Catalysis published new progress about Biomimetics. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, SDS of cas: 143-24-8.

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