Tag: M.W=200-250

Zhang, Qi published the artcileHigh-performance Li-O2 batteries enabled by dibenzo-24-crown-8 aldehyde derivative as electrolyte additives, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium ion battery electrolyte additive aldehyde derivative.

Aprotic Li-O2 batteries (LOB) with high theor. energy d. usually experience cathode clogging by insoluble Li2O2, along with high charge overpotential from its insulating nature. A dibenzo-24-crown-8 aldehyde derivative (DB24C8A) is employed as an additive to enhance the binding strength with Li+, hence promoting the solubility of Li2O2. The generated [DB24C8A•Li+] avoids the parasitic reactions caused by reactive O2-. Thus, the LOB achieves a large discharge capacity of 6939 mAh g-1 at 200 mA g-1 and a high Li2O2 yield (≈93%). Moreover, DB24C8A facilitates the efficient decomposition of Li2O2 via Li+ coordination during the charge process, reducing the charge overpotential to 0.77 V and prolonging the lifetime of the LOB over 213 cycles at 1000 mAh g-1 and 500 mA g-1. This work provides a novel approach to boost the performance of LOB by incorporation of crown ether-based compounds to regulate the Li2O2 growth and decomposition pathway.

Advanced Energy Materials published new progress about Battery electrolytes. 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

Mukra, Tzach published the artcileDisiloxane with nitrile end groups as Co-solvent for electrolytes in lithium-sulfur batteries – A feasible approach to replace LiNO3, Related Products of ethers-buliding-blocks, the main research area is disiloxane nitrile solvent electrolyte lithium sulfur battery nitrate solvent.

The Li-S battery is a leading candidate for a new-generation Li-ion battery, because of its high theor. capacity and abundance of S. Yet, the flammability of either the organic-carbonate or ether-based electrolytes used in such battery systems is of concern. Also, the oxidation of Li2S gives polysulfides (Li2S3-8), which dissolve in the electrolyte and initiate a shuttle mechanism, which results in low Coulombic efficiency and growth of a thick SEI on the anode. Therefore, various electrolyte additives, like LiNO3, are added to the electrolyte. Unfortunately, the nitrate additive is gradually consumed and the shuttle effect resumes. Here the authors present a LiNO3-free electrolyte consisting of nitrile-functionalized disiloxane (TmdSx-CN) with dissolved LiTFSI as a candidate electrolyte for Li-S batteries. The authors have examined the effect of TmdSx-CN as a co-solvent along with 1,3-dioxolane (DOL) on the performance of Li/S cells. LiNO3-free TmdSx-CN:DOL electrolyte mitigates the polysulfide shuttle. The cell containing this electrolyte yields an average capacity of 700 mAh g-1 and 96% Coulombic efficiency for >100 cycles. Also, 87.5% energy efficiency, which is similar to the LiNO3-based control cell. The authors expect that the authors’ preliminary results will encourage the further use of siloxane-based electrolytes in metallic-Li battery systems, and specifically, in Li-S batteries.

Electrochimica Acta published new progress about Battery electrolytes. 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

Kosir, Urban published the artcilePolysulfide species in various electrolytes of Li-S batteries – a chromatographic investigation, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is polysulfide species various electrolyte lithium sulfur batteries chromatog.

The HPLC method including derivatization was used for the determination of polysulfide species concentration during the operation of Li-S battery cells. A comparison was made between a glyme based electrolyte, which exhibits high polysulfide solubility, and a fluorinated ether based electrolyte, which probably reduces the dissolution and diffusion of polysulfides. A sep. anal. was conducted on porous C cathodes and separators obtained from cycled battery cells. The determination of the species concentration trends allowed a deeper understanding of the differences in battery cell operating mechanism. Polysulfide species are formed in similar concentrations in both examined electrolytes, but they remain trapped in the cathode pores in the fluorinated ether based electrolyte Li-S battery cells. The polysulfide concentration in the separators of the fluorinated ether cells was below the limit of detection, which indicates that the solubilities of polysulfides in the fluorinated electrolyte are <50μM. This results in absence of disproportionation or coproportionation reactions between the polysulfide species in solution This different mechanism influences the change in length and potential of the voltage plateaus of the battery cells during galvanostatic cycling. Electrochimica Acta published new progress about Battery electrolytes. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application of 2,5,8,11,14-Pentaoxapentadecane.

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

Nakanishi, Azusa published the artcileSulfolane-Based Highly Concentrated Electrolytes of Lithium Bis(trifluoromethanesulfonyl)amide: Ionic Transport, Li-Ion Coordination, and Li-S Battery Performance, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is sulfolane concentrated electrolyte lithium trifluoromethanesulfonylamide ionic conductivity sulfur battery.

Following the recent study demonstrating predominant Li-ion hopping conduction in sulfolane (SL)-based highly concentrated electrolytes with LiBF4, LiClO4, and lithium bis(fluorosulfonyl)amide, herein a systematic study on transport properties and Li-ion coordination of SL-based electrolytes with lithium bis(trifluoromethanesulfonyl)amide was performed. In the highly concentrated region, Li ions clearly diffuse faster than SL and TFSA anions. The two oxygen atoms of the SL sulfonyl group tend to coordinate to two different neighboring Li ions and TFSA anions form ionic clusters with Li ions, verifying the previous observation of the unusual Li-ion conduction and its relevance to the SL- and anion-bridged, chainlike Li-ion coordination structure for the SL-based concentrated systems with other Li salts. Also, addition of hydrofluoroether (HFE) to the SL-based concentrated electrolytes greatly enhances diffusion coefficients but fragments the chainlike Li-ion coordination to smaller clusters, leading to a reduced contribution of Li-ion hopping to the overall Li-ion conduction. The SL-based concentrated electrolyte and its mixtures with HFE showed lower lithium polysulfide solubility and higher rate capability for lithium-sulfur (Li-S) cells compared with previously reported tetraglyme-based electrolytes. The SL-based electrolytes manifest a significant improvement in Li-ion mass transfer as a sparingly solvating electrolyte, enabling the solid-state sulfur redox reactions in high-performance Li-S batteries.

Journal of Physical Chemistry C published new progress about Battery electrolytes. 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

Fujihira, Yamato published the artcilePentafluoroethylation of Carbonyl Compounds by HFC-125 via the Encapsulation of the K Cation with Glymes, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is pentafluoroethylation carbonyl compound HFC 125 encapsulation potassium cation glyme.

A simple protocol to overcome the explosive pentafluoroethylation of carbonyl compounds by HFC-125 is described. The use of potassium (K) bases with triglyme or tetraglyme as a solvent safely yields the pentafluoroethylation products in good to high yields. The exptl. results suggest that an encapsulation of the K cation by glymes as K(glyme)2 inhibits the contact between the K cation and the reactive anionic pentafluoroethyl counterion, preventing their transformation into KF and explosive tetrafluoroethylene (TFE). The generation of sterically demanding [K(G3)2]+ and [K(G4)2]+ is an effective way as an unstable pentafluoroethyl anion reservoir.

Journal of Organic Chemistry published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application of 2,5,8,11,14-Pentaoxapentadecane.

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

Blond, Pascale published the artcileReady-to-Use Germanium Surfaces for the Development of FTIR-Based Biosensors for Proteins, Product Details of C9H20O5, the main research area is germanium surface FTIR biosensor protein.

Germanium is particularly suitable for the design of FTIR-based biosensors for proteins. The grafting of stable and thin organic layers on germanium surfaces remains, however, challenging. To tackle this problem, the authors developed a calix[4]arene-tetradiazonium salt decorated with four oligo(ethylene glycol) chains and a terminal reactive carboxyl group. This versatile mol. platform was covalently grafted on germanium surfaces to yield robust ready-to-use surfaces for biosensing applications. The grafted calixarene monolayer prevents nonspecific adsorption of proteins while allowing bioconjugation with biomols. such as bovine serum albumin (BSA) or biotin. The native form of the studied proteins was maintained upon immobilization. As a proof of concept, the resulting calix[4]arene-based germanium biosensors were used through a combination of ATR-FTIR spectroscopy and fluorescence microscopy for the selective detection of streptavidin from a complex medium. This study opens real possibilities for the development of sensitive and selective FTIR-based biosensors devoted to the detection of proteins.

Langmuir published new progress about Attenuated-total-reflectance Fourier-transform IR spectroscopy. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Product Details of C9H20O5.

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

Atik, Jaschar published the artcileIonic liquid plasticizers comprising solvating cations for lithium metal polymer batteries, HPLC of Formula: 23783-42-8, the main research area is ionic liquid plasticizer lithium metal polymer battery.

Ternary solid polymer electrolytes (TSPEs) with ionic liquids (ILs) including alkyl-based ammonium cations and low coordinating anions suffer from the lack of Li+ ion coordination by the ILs compared to the immobile polymer backbone, in terms of Li+ ion transport. Thus, solvating ionic liquids (SILs) with an oligo(ethylene oxide) side chain attached onto the cation were prepared to improve the interaction between Li+ and the IL and accelerate Li+ transport in TSPEs. A variety of methods, such as pulsed field gradient NMR spectroscopy, Li metal plating/stripping and measurements of Sand’s times were used to show that Li+ ion transference numbers increase with the oligo(ethylene oxide) side chain length in SIL-based TSPEs, which results in faster Li+ ion transport and translates into much slower lithium depletion at a given current, thereby delaying the onset of fast dendrite growth of lithium metal.

Electrochimica Acta published new progress about Carbon black Role: MOA (Modifier or Additive Use), USES (Uses). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, HPLC of Formula: 23783-42-8.

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

Konishi, Hiroaki published the artcileInfluence of Electrolyte Composition on the Electrochemical Reaction Mechanism of Bismuth Fluoride Electrode in Fluoride Shuttle Battery, Product Details of C10H22O5, the main research area is fluoride shuttle battery bismuth fluoride electrode electrolyte composition.

Fluoride shuttle battery (FSB) is a promising next-generation battery candidate. In the FSB, metal fluoride and organic solvent containing supporting electrolyte salt and anion acceptor were used as active material and electrolyte. In this study, using bis[2-(2-methoxyethoxy)ethyl] ether (tetraglyme: G4) containing cesium fluoride (CsF; 0.45 mol dm-3 or saturated) and triphenylboroxine (TPhBX; 0.50 mol dm-3) as electrolyte (CsF(0.45)-TPhBX(0.50)-G4 and CsF(saturate)-TPhBX(0.50)-G4), the electrochem. performance of bismuth fluoride (BiF3) was assessed. Although the discharge and charge reactions of BiF3 electrode proceeded in both electrolytes, the cycling performance of BiF3 electrode in CsF(0.45)-TPhBX(0.50)-G4 was poorer than that in CsF(saturate)-TPhBX(0.50)-G4. The cause of differences in the electrochem. properties was investigated using at. absorption spectrometry (AAS), XPS, and cross-sectional SEM (SEM)/energy dispersive X-ray spectroscopy (EDX). The AAS results indicate that the poor cycling performance with CsF(0.45)-TPhBX(0.50)-G4 was due to the dissolution of active material during charging. The XPS and cross-sectional SEM/EDX results indicate that the formation state of Bi, and the progress of electrolyte decomposition during discharging were affected by the CsF/TPhBX ratio in the electrolyte.

Journal of Physical Chemistry C published new progress about Carbon black 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, Product Details of C10H22O5.

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

Xiao, Yushan published the artcileSynthesis of SCF3-Substituted Sulfonium Ylides from Sulfonium Salts or α-Bromoacetic Esters, Safety of 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is acyltetrahydrothiophenium bromide trifluoromethylthiophthalimide trifluoromethylthiolation; bromoacetate tetrahydrothiophene trifluoromethylthiophthalimide trifluoromethylthiolation; tetrahydrothiophenylidene trifluoromethylthioethanone preparation.

A metal-free direct trifluoromethylthiolation of sulfonium ylides with an electrophilic trifluoromethylthiolating reagent was established, in which sulfonium salt or α-bromoacetic ester was employed as sulfonium ylide precursors. This trifluoromethylthiolation enabled the straightforward construction of SCF3-substituted sulfonium ylides from a wide range of substrates, including ketones, esters, and even PEGylated substrates. Moreover, the application of this approach in large-scale preparation and the fluorescence and fluorine-19 magnetic resonance imaging capabilities of the product were also explored.

Advanced Synthesis & Catalysis published new progress about Acetates Role: RCT (Reactant), RACT (Reactant or Reagent) (bromo-). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Safety of 2,5,8,11-Tetraoxatridecan-13-ol.

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

Wang, Miaomiao published the artcileSuspect Screening and Chemical Profile Analysis of Storm-Water Runoff Following 2017 Wildfires in Northern California, SDS of cas: 23783-42-8, the main research area is storm water wildfire suspect screening California; Emerging contaminants of concern; Nontargeted analysis; Organic contaminants; Storm-water runoff; Wildfire-impacted.

The combustion of structures and household materials as well as firefighting during wildfires lead to releases of potentially hazardous chems. directly into the landscape. Subsequent storm-water runoff events can transport wildfire-related contaminants to downstream receiving waters, where they may pose water quality concerns. To evaluate the environmental hazards of northern California fires on the types of contaminants in storm water discharging to San Francisco Bay and the coastal marine environment, we analyzed storm water collected after the northern California wildfires (Oct. 2017) using a nontargeted anal. (NTA) approach. Liquid chromatog. quadrupole time-of-flight mass spectrometric anal. was completed on storm-water samples (n = 20) collected from Napa County (impacted by the Atlas and Nuns fires), the city of Santa Rosa, and Sonoma County (Nuns and Tubbs fires) during storm events that occurred in Nov. 2017 and Jan. 2018. The NTA approach enabled us to establish profiles of contaminants based on peak intensities and chem. categories found in the storm-water samples and to prioritize significant chems. within these profiles possibly attributed to the wildfire. The results demonstrated the presence of a wide range of contaminants in the storm water, including surfactants, per- and polyfluoroalkyl substances, and chems. from consumer and personal care products. Homologs of polyethylene glycol were found to be the major contributor to the contaminants, followed by other widely used surfactants. Nonylphenol ethoxylates, typically used as surfactants, were detected and were much higher in samples collected after Storm Event 1 relative to Storm Event 2. The present study provides a comprehensive approach for examining wildfire-impacted storm-water contamination of related contaminants, of which we found many with potential ecol. risk.

Environmental Toxicology and Chemistry published new progress about Alcohols, ethoxylated Role: ANT (Analyte), ANST (Analytical Study). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, SDS of cas: 23783-42-8.

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