Category: 143-24-8

Drvaric Talian, Sara published the artcileImpedance response of porous carbon cathodes in polysulfide redox system, Formula: C10H22O5, the main research area is impedance porous carbon cathode polysulfide redox.

The transport-reaction mechanism taking place in porous cathodes used in Li-S battery cells is systematically studied using impedance spectroscopy. The adverse effects of metallic Li are excluded by using sym. C-C cells. The results obtained on two types of porous electrodes, a C felt and a conventional mesoporous C electrode, are compared to those previously obtained on a flat glassy C electrode. The thickness of both porous electrodes as well as the thickness of porous separator are varied and impedance spectra studied. The shapes, magnitudes and trends of various impedance features could well be reproduced by a proposed transmission line model. The model is upgraded with respect to known transmission line models in two ways: diffusion in pores of electrode is taken into account and a coupling of this diffusion to diffusion in separator is carried out. The results consistently show that the migration, reaction and diffusion impedances due to processes taking place inside a typical cathode are one to two orders of magnitude smaller than the impedance due to diffusion of active species in the porous separator. However, the present findings strongly indicate that if one could suppress the leakage of polysulfides into the separator, the total impedance would drop dramatically, regardless of the actual thickness or porosity of the cathode.

Electrochimica Acta published new progress about Diffusion (in pores). 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Formula: C10H22O5.

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

Schaffarczyk McHale, Karin S. published the artcileUnderstanding the effects of solvate ionic liquids as solvents on substitution processes, SDS of cas: 143-24-8, the main research area is solvate ionic liquid solvent nucleophilic substitution reaction kinetics; aromatic substitution reaction kinetics nucleophilic solvent solvate ionic liquid.

The effects of solvate ionic liquids as solvents have been considered for two substitution processes where the solvent effects of typical ionic liquids have been extensively investigated previously; the bimol. nucleophilic substitution (SN2) reaction between pyridine and benzyl bromide and the nucleophilic aromatic substitution (SNAr) reaction between ethanol and 1-fluoro-2,4-dinitrobenzene. It was found that use of solvate ionic liquids gave rise to similar trends in the activation parameters for both substitution processes as typical ionic liquids, implying the microscopic interactions responsible for the effects were the same. However, different effects on the rate constants compared to typical ionic liquids were observed due to the changes in the balance of enthalpic and entropic contributions to the observed rate constants From these data it is clear that the reaction outcome for both of these substitution reactions fall within the ‘predictive framework’ established in previous studies with a cautionary tale or two of their own to add to the general knowledge of ionic liquid solvent effects for these processes, particularly with respect to potential reactivity of the solvate ionic liquids themselves.

Organic & Biomolecular Chemistry published new progress about Activation enthalpy. 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

Hosoya, Takashi published the artcileAlkaline aerobic oxidation of native softwood lignin in the presence of Na+-cyclic polyether complexes, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is softwood lignin sodium cyclic polyether complex aerobic oxidation.

Alk. aerobic oxidation is a promising way to convert lignin to low mol. weight phenols, especially 4-hydroxybenzaldehydes. Our previous studies reported that oxidation of softwood lignin samples with a bulky cation, Bu4N+, facilitates selective production of vanillin (4-hydroxy-3-methoxybenzaldehyde). This study presents vanillin production from native softwood lignin in Japanese cedar (Cryptomeria japonica) in NaOH aqueous in the presence of cyclic polyethers, with our expectation that Na+-polyether complexes exhibit effects similar to those of Bu4N+. Oxidation of wood flour (10 mg) in 4.0 M NaOH aqueous (2.0 mL) at 120°C under air gave vanillin with 6.2 weight% lignin-based yield, which was raised to 15.2 weight% by the addition of 15-crown-5 (1,4,7,10,13-pentaoxacyclopentadecane). On the other hand, such effect was not observed with the addition of tetraethylene glycol di-Me ether, a non-cyclic analog of 15-crown-5. Mechanistic study with a lignin model compound revealed that stabilization of a vanillin precursor by the complex cation was a reason for the increased vanillin yield exhibited by the crown ether. This is similar to the influence of Bu4N+ reported previously, suggesting effective control of aerobic oxidation by large size cationic species.

Journal of Wood Chemistry and Technology published new progress about Cannizzaro reaction. 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

Hashimoto, Kei published the artcileSolvation Structure of Poly(benzyl methacrylate) in a Solvate Ionic Liquid: Preferential Solvation of Li-Glyme Complex Cation, HPLC of Formula: 143-24-8, the main research area is solvation polybenzyl methacrylate lithium glyme based ionic liquid MD; x ray scattering solvation polybenzylmethacrylate lithium glyme ionic liquid.

We report the solvation structure of a lower critical solution temperature (LCST)-type thermoresponsive polymer in a solvate ionic liquid (SIL, i.e., an ionic liquid comprising solvate ions) to elucidate the predominant interaction for the dissolution of the thermoresponsive polymer in SIL at low temperatures The solvation structure of poly(benzyl methacrylate) (PBnMA) and a model compound of its monomer in a typical glyme-based SIL, [Li(G4)][TFSA] (G4: tetraglyme; TFSA: bis(trifluoromethanesulfonyl)amide), have been investigated using high-energy X-ray total scattering and all-atom mol. dynamics simulations. In the model compound/SIL system, the intermol. components extracted from the total G(r)s revealed that the ester moiety of BnMA is preferentially solvated by Li cations through a cation-dipole interaction, which induces slight desolvation of the G4 mols., and the aromatic ring of BnMA is secondarily solvated by the [Li(G4)] cation complex through a cation-π interaction with maintaining the complex structure. In contrast, TFSA anions are attracted only by the [Li(G4)] cation. These interactions result in the formation of a solvation layer of SILs around the aromatic ring, which plays a key role in the neg. entropy and enthalpy of mixing. Meanwhile, in the polymer solution, the coordination number of the Li cation around the ester moiety significantly decreased. This could be ascribed to the steric effect of the bulky side chains, preventing the approach of the [Li(G4)] cation complex to the ester moiety located near the main chain. These solvation structures lead to small absolute values of neg. entropy and enthalpy of mixing, which together are key factors to understand the LCST-type phase behavior in the IL system.

Journal of Physical Chemistry B published new progress about Coordination number. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, HPLC of Formula: 143-24-8.

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

Khan, N. M. published the artcileElectrical conduction of PMMA/PLA doped lithium bis(oxalato) borate based hybrid gel polymer electrolyte, COA of Formula: C10H22O5, the main research area is elec conduction polylactic acid polymethylmethacrylate hybrid gel polymer electrolyte.

The present work highlights the investigation of elec. conduction properties of gel polymer electrolyte (GPE) based poly(methyl) methacrylate (PMMA) and poly(lactic) acid (PLA) blend doped with various compositions of lithium bis(oxalato) borate. The impedance anal. revealed the GPE systems exhibit maximum ionic conductivity of 1.37 x 10-3 S cm-1 for sample PLi20. The elec. properties based on the dielec. permittivity of entire samples decreased with increasing frequency and followed the trend of ionic conductivity Further anal. was carried out to determine the dielec. response at different temperatures, focusing on the most conducting sample (PLi20). Both dielec. constant and loss increase with the increasing temperature, which suggested that total polarization has occurred. In conclusion, the samples with 20 wt% composition of LiBOB exhibit the highest conducting properties which significantly provides good elec. performance for the application in energy storage devices.

Materials Today: Proceedings published new progress about Dielectric constant. 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

Houchins, Gregory published the artcileMechanism for Singlet Oxygen Production in Li-Ion and Metal-Air Batteries, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is mechanism singlet oxygen production lithium ion metal air battery.

Singlet oxygen has emerged as a real mystery puzzling battery science, having been observed in Li-O2 and Na-O2 batteries, in conventional Li-ion batteries with NMC cathodes, and during the oxidation of Li2CO3. The formation of singlet oxygen has been directly linked to the degradation and catastrophic fade seen in these battery chemistries. While there are several proposed hypothesis for its origin, the exact mechanism for the formation of singlet oxygen remains unclear. In this Letter, we attempt to unify these findings by proposing a mechanism of singlet oxygen production in metal-air and Li-ion batteries. We show that a potential dependence of surface termination explains the onset potentials of singlet oxygen release, and in all considered cases the mechanism of singlet oxygen generation is through the chem. disproportionation of the uncoordinated superoxide anion in solution; therefore, the singlet oxygen yield is determined by the concentration of free superoxide vs. alkali superoxide ion pairs in solution

ACS Energy Letters published new progress about Dielectric constant. 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

Parkatzidis, Kostas published the artcilePhotoinduced Iron-Catalyzed ATRP of Renewable Monomers in Low-Toxicity Solvents: A Greener Approach, Quality Control of 143-24-8, the main research area is photoinduced iron catalyzed ATRP monomer solvent.

Producing polymers from renewable resources via more sustainable approaches has become increasingly important. Herein we present the polymerization of monomers obtained from biobased renewable resources, employing an environmentally friendly photoinduced iron-catalyzed atom transfer radical polymerization (ATRP) in low-toxicity solvents. We demonstrate that renewable monomers can be successfully polymerized into sustainable polymers with controlled mol. weights and narrow molar mass distributions (D as low as 1.17). This is in contrast to reversible addition-fragmentation chain-transfer (RAFT) polymerization, arguably the most commonly employed method to polymerize biobased monomers, which led to poorer mol. weight control and higher dispersities for these specific monomers (Ds ~1.4). The versatility of our approach was further highlighted by the temporal control demonstrated through intermittent “”on/off”” cycles, controlled polymerizations of a variety of monomers and chain lengths, oxygen-tolerance, and high end-group fidelity exemplified by the synthesis of block copolymers. This work highlights photoinduced iron-catalyzed ATRP as a powerful tool for the synthesis of renewable polymers.

ACS Macro Letters published new progress about RAFT polymerization. 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

Makarouni, Dimitra published the artcileSolvent-Driven Selectivity on the One-Step Catalytic Synthesis of Manoyl Oxide Based on a Novel and Sustainable “”Zeolite Catalyst-Solvent”” System, COA of Formula: C10H22O5, the main research area is manoyl oxide preparation zeolite glyme catalyst cyclodehydration sclareol.

Presented is the application of a novel “”zeolite catalyst-solvent”” system for the sustainable one-step synthesis of the terpenoid manoyl oxide I, the potential precursor of forskolin and Ambrox. Manoyl oxide high-yield and large-scale production over a zeolite catalyst has been infeasible so far, while the proposed system results in 90% yields at 135°C and atm. pressure. A substrate-controlled methodol. is used to achieve selectivity. Solvent-driven catalysis was demonstrated, as the activation energy barrier decreases in the presence of appropriate solvents, being 62.7 and 93.46 kJmol-1 for a glyme-type solvent and dodecane, resp. Finally, catalyst acidity was found to be a key parameter for the process.

Catalysis Letters published new progress about Acidity (catalyst). 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

Divya, Madhusoodhanan Lathika published the artcileHighly Reversible Na-Intercalation into Graphite Recovered from Spent Li-Ion Batteries for High-Energy Na-Ion Capacitor, Computed Properties of 143-24-8, the main research area is supercapacitor graphite tetraglyme aging; Graphite; Na-ion capacitor; ether; high-temperature aging; pre-sodiation.

High-performance Na-ion capacitor (NIC) was constructed with graphite recovered from spent Li-ion batteries (LIBs) as battery-type neg. electrode and high-surface-area activated carbon as a supercapacitor component. Unlike Li-insertion into graphite, Na-insertion into graphite is extremely limited; hence, a “”solvent-co-intercalation”” mechanism was proposed for high reversibility using ether family solvents. First, the Na-insertion properties were assessed in the half-cell assembly with 0.5 M NaPF6 in tetraethylene glycol di-Me ether as an electrolyte solution and compared with the com. graphite. The NIC comprised pre-sodiated graphite as a neg. electrode and com. activated carbon as a cathode. This fascinating NIC configuration displayed the maximum energy d. of 59.93 Wh kg-1 with exceptional cyclability of 5000 cycles at ambient temperature with approx. 98% retention. Interestingly, the electrode aging process in the presence of electrolyte resulted in approx. 19% higher energy d. than the routine electrode heat treatment. Further, the electrochem. activity of the NIC at various temperatures was studied, and it was found that the graphite recovered from spent LIBs could be effectively reused towards the construction of high-performance charge storage devices with exceptional performance.

ChemSusChem published new progress about Aging of materials. 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

Dutta, Arghya published the artcileIdentifying the Performance Limiters in High Areal-Capacity Li-Oxygen Battery at Subzero Temperatures, Synthetic Route of 143-24-8, the main research area is lithium oxygen battery subzero temperature.

Li-O2 batteries are found to show severe loss in energy d. at subzero temperatures Here we investigate and deconvolute several temperature dependent parameters of a high areal-capacity Li-O2 battery, and our analyses show that combined effects of electrode kinetics, diffusion of electroactive species in the electrolyte, and charge transport through the electrodes directly influence the temperature dependent average discharge potential of the cell. In contrast, the low capacity of Li-O2 cells at subzero temperatures is found to be the result of charge transport resistance in the Li2O2 layer and the diffusion limitation of electroactive species in the electrolyte.

ACS Applied Energy Materials published new progress about Battery electrodes. 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