Tag: M.W=200-250

Shi, Kaiyuan published the artcileElectrochemical Polishing: An Effective Strategy for Eliminating Li Dendrites, COA of Formula: C10H22O5, the main research area is lithium dendrite electrochem polishing deposition density functional theory.

Dendritic growth of lithium (Li) is well-known to originate from deposition on rough and inhomogeneous Li-metal surfaces, and has long been a central problem in charging lithium metal batteries. Herein, a universal strategy is proposed for dendrite suppression by both in situ and ex situ electrochem. polishing of Li metal from the corrosion science perspective. This polishing technique greatly smoothens the surface of the Li and dynamically regenerates a homogeneous solid electrolyte interphase film simultaneously during cell cycling, which suppresses the nucleation sites for dendritic Li and establishes an ideal matrix for even deposition of Li. As a result, the polished Li presents a stable voltage profile and high Li utilization in both the sym. cells and the full cells coupled with LiNi0.8Co0.1Mn0.1O2 (NCM811) or LiFePO4. The long cycle life of polished Li electrodes clearly demonstrates a uniform dendrite-free deposition of Li. This strategy shows a new direction to realize a uniform deposition of Li by providing a regenerative homogeneous Li-surface during repeated cycling.

Advanced Functional Materials published new progress about Adsorption. 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

Li, Na published the artcileBacteriochlorin aggregates as dopant-free hole-transporting materials for perovskite solar cells, Product Details of C9H20O5, the main research area is bacteriochlorin aggregate hole transport perovskite solar cell electrochem property.

Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted great interests not only of academic field but also of industrial world toward practical applications in the last decade due to their extremely low production cost and excellent photo-phys. properties. Hole-transporting layer (HTL) as an integral component of PSC plays an important role in elevating its performance. In this work, five bacteriochlorophyll-a derivatives characterized by different C17-propionate residue were prepared and their J-type aggregates were investigated as HTLs of PSCs. It was confirmed that the nature of the introduced C17-propionate side chains have negligible effects on the electrochem. properties of main dye unit, such as the electronic absorption spectra and energy levels. However, the different lipophilicity, hydrophilicity, or hydrophobicity of chain characters affect the solubility of each dye component, resulting in diverse surface morphologies of their aggregate films as revealed by AFM observations. Furthermore, the five solid films prepared by spin-coating method showed discrepant charge extraction and transport abilities as HTLs, which were supported by both photo luminescence spectra and electrochem. impedance spectroscopy measurement results and were concluded to be the fundamental reason of the different PSC performance.

Organic Electronics published new progress about Aggregates. 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

Yiu, Asteria published the artcileFacile Synthesis of Novel Thermo-Responsive Polyvalerolactones with Tunable LCSTs, COA of Formula: C9H20O5, the main research area is thermoresponsive polyvalerolactone biodegradable tunable lower critical solution temperature; oligoethylene glycol functionalized polyvalerolactone thermal tunable.

Thermoresponsive polymers have emerged as promising candidates for biomedical applications. Seven novel oligoethylene glycol (OEG) functionalized polyvalerolactones P1-P7 are synthesized from poly(α-allyl-δ-valerolactone) via thiol-ene addition post-polymerization modification. All seven polymers exhibit thermoresponsive behavior with lower critical solution temperatures (LCSTs) ranging from 13.8 to 92.2°C. Polymers P5-P7 are synthesized via thiol-ene addition reaction using two thiol mixtures at three different ratios. LCSTs of P5-P7 fall in between those of P1 and P2, and exhibit a linear relationship, indicating a tunable thermoresponsive system. This newly developed system offers great control for a desired thermoresponsive biocompatible, biodegradable polymeric system with desired LCSTs.

Macromolecular Chemistry and Physics published new progress about Aggregates. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, COA of Formula: C9H20O5.

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

Bartolec, Boris published the artcileEmergence of Compartments Formed from Unconventional Surfactants in Dynamic Combinatorial Libraries, Computed Properties of 23783-42-8, the main research area is combinatorial library self assembly membrane.

Assembly processes can drive the selection of self-assembling mols. in dynamic combinatorial libraries, yielding self-synthesizing materials. We now show how such selection in a dynamic combinatorial library made from an amphiphilic building block which, by itself, assembles into micelles, can yield membranous aggregates ranging from vesicles to sponge phases. These aggregates are made from a mixture of unconventional surfactant mols., showing the power of dynamic combinatorial selection approaches for the discovery of new, not readily predictable, self-assembly motifs.

Langmuir published new progress about Aggregates. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Computed Properties of 23783-42-8.

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

Bach, Nicolai N. published the artcileActive Mechanical Threading by a Molecular Motor, Safety of 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is active mech threading mol motor; Hemithioindigo; Indigoids; Molecular Machines; Molecular Motors; Photochemistry.

Mol. motors transform external energy input into directional motions and offer exquisite precision for nano-scale manipulations. To make full use of mol. motor capacities, their directional motions need to be transmitted and used for powering downstream mol. events. Here we present a macrocyclic mol. motor structure able to perform repetitive mol. threading of a flexible tetraethylene glycol chain through the macrocycle. This mech. threading event is actively powered by the motor and leads to a direct translation of the unidirectional motor rotation into unidirectional translation motion (chain vs. ring). The mechanism of the active mech. threading is elucidated and the actual threading step is identified as a combined helix inversion and threading event. The established mol. machine function resembles the crucial step of macroscopic weaving or sewing processes and therefore offers a first entry point to a “”mol. knitting”” counterpart.

Angewandte Chemie, International Edition published new progress about Alkylation. 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

Kichambare, Padmakar published the artcilePhthalocyanine as catalyst for rechargeable lithium-oxygen batteries, Computed Properties of 143-24-8, the main research area is phthalocyanine catalyst rechargeable lithium oxygen battery.

Tetrabutylammonium lithium phthalocyanine (TBA-LiPc) can function as a soluble catalyst in low-donor-number (DN) solvents such as tetraethylene glycol di-Me ether (TEGDME) (DN=16.6) for rechargeable lithium-oxygen cells. It is able to do so given that mol. oxygen forms a complex with the lithium phthalocyanine anion thereby keeping oxygen and the reaction intermediates in solution D. functional theory (DFT) calculations show the mechanism for complex formation and cyclic voltammetry results support the notion of reaction intermediates that are soluble in solution during oxygen reduction and oxygen evolution reactions. Deep discharge of a lithium-oxygen cell with TBA-LiPc had a capacity that was 3.6 times greater (5.28 mAh) than a similar cell with no TBA-LiPc (1.47 mAh). Long-term cycling of a lithium-oxygen cell with TBA-LiPc at a fixed capacity of 0.55 mAh did not fail after 100 cycles. A similar cell without TBA-LiPc failed after 37 cycles. Long-term cycling of a lithium-oxygen cell with TBA-LiPc and using natural air in low humidity as the source of oxygen cycled 151 times before cell failure.

Journal of Porphyrins and Phthalocyanines published new progress about Atmosphere. 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

Furuya, Ryota published the artcilePotential dependence of the impedance of solid electrolyte interphase in some electrolytes, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is solid electrolyte interphase electrode potential impedance.

The dependence of the impedances of lithium phosphorus oxynitride (LiPON) thin film and solid electrolyte interphase (SEI) formed by decomposition of some electrolytes on the electrode potential was investigated by electrochem. impedance spectroscopy. A LiPON thin film was prepared on a Ni electrode by radio frequency magnetron sputtering of Li3PO4 under nitrogen atm. The resistance of the LiPON thin film decreased with lowering the electrode potential in an ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing 1 M LiTFSA. The similar potential dependence of the impedance of the SEI formed in 1 M LiTFSA/BMPTFSA was observed, suggesting that the Li+ carrier d. in the LiPON thin film and SEI increased with lowering the electrode potential probably due to the doping of Li+ from the electrolyte into the thin Li+ conductors in order to compensate the neg. charge on the electrode. On the other hand, the potential dependence of the SEI formed in LiTFSA-tetraglyme (G4) solvate ionic liquid was insignificant because of the high concentration of Li+ in the SEI and electrolyte. The resistance of the SEI formed in 1 M LiClO4/EC (ethylene carbonate) + DMC (di-Me carbonate) (1 : 1 vol%) did not depend on the electrode potential, suggesting the thin and highly Li+ conductive SEI is formed in the organic electrolyte.

Electrochemistry (Tokyo, Japan) published new progress about Atmosphere. 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

Delehedde, Caroline published the artcileNovel Sterically Crowded and Conformationally Constrained α-Aminophosphonates with a Near-Neutral pKa as Highly Accurate 31P NMR pH Probes. Application to Subtle pH Gradients Determination in Dictyostelium discoideum Cells, Computed Properties of 23783-42-8, the main research area is Dictyostelium discoideum cell aminophosphonate neutral pKa NMR pH probe; 31P NMR; Dictyostelium discoideum cells; X-ray crystallography; pH probes; phophorus pyramidalization angle; trans-sarcolemmal pH gradients; α-aminophosphonates.

In order to discover new 31P NMR markers for probing subtle pH changes (<0.2 pH unit) in biol. environments, fifteen new conformationally constrained or sterically hindered α-aminophosphonates derived from diethyl(2-methylpyrrolidin-2-yl)phosphonate were synthesized and tested for their pH reporting and cytotoxic properties in vitro. All compounds showed near-neutral pKas (ranging 6.28-6.97), chem. shifts not overlapping those of phosphorus metabolites, and spectroscopic sensitivities (i.e., chem. shifts variation Δδab between the acidic and basic forms) ranging from 9.2-10.7 ppm, being fourfold larger than conventional endogenous markers such as inorganic phosphate. X-ray crystallog. studies combined with predictive empirical relationships and ab initio calculations addressed the inductive and stereochem. effects of substituents linked to the protonated amine function. Satisfactory correlations were established between pKas and both the 2D structure and pyramidalization at phosphorus, showing that steric crowding around the phosphorus is crucial for modulating Δδab. Finally, the hit 31P NMR pH probe 1b bearing an unsubstituted 1,3,2-dioxaphosphorinane ring, which is moderately lipophilic, nontoxic on A549 and NHLF cells, and showing pKa = 6.45 with Δδab = 10.64 ppm, allowed the first clear-cut evidence of trans-sarcolemmal pH gradients in normoxic Dictyostelium discoideum cells with an accuracy of <0.05 pH units. Molecules published new progress about Biomarkers. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Computed Properties of 23783-42-8.

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

Liu, Xiao published the artcileBiphasic Electrolyte Inhibiting the Shuttle Effect of Redox Molecules in Lithium-Metal Batteries, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium metal battery shuttle effect biphasic electrolyte; biphasic electrolytes; lithium redox flow batteries; lithium-oxygen batteries; redox mediators; shuttle effects.

Redox mols. (RMs) as electron carriers have been widely used in electrochem. energy-storage devices (ESDs), such as lithium redox flow batteries and lithium-O2 batteries. Unfortunately, migration of RMs to the lithium (Li) anode leads to side reactions, resulting in reduced coulombic efficiency and early cell death. Our proof-of-concept study utilizes a biphasic organic electrolyte to resolve this issue, in which nonafluoro-1,1,2,2-tetrahydrohexyl-trimethoxysilane (NFTOS) and ether (or sulfone) with lithium bis(trifluoromethane)sulfonimide (LiTFSI) can be separated to form the immiscible anolyte and catholyte. RMs are extracted to the catholyte due to the enormous solubility coefficients in the biphasic electrolytes with high and low polarity, resulting in inhibition of the shuttle effect. When coupled with a lithium anode, the Li-Li sym., Li redox flow and Li-O2 batteries can achieve considerably prolonged cycle life with biphasic electrolytes. This concept provides a promising strategy to suppress the shuttle effect of RMs in ESDs.

Angewandte Chemie, International Edition published new progress about Cell cycle. 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

Erdol, Zeynep published the artcileAssessment on the Stable and High-Capacity Na-Se Batteries with Carbonate Electrolytes, Product Details of C10H22O5, the main research area is sodium selenium battery carbonate electrolyte.

Factors affecting proper functioning of Na-Se system are investigated focusing on the polyselenide formation in ether- and carbonate-based electrolytes. To do so, Se cathode is prepared by ball milling with com. carbon and selenium powders. It is revealed that the soluble polyselenide species form in ether while no signature in carbonates proven by the in-situ cyclic voltammetry and ex-situ UV-visible spectroscopy measurements as well as monitoring self-discharge behaviors. Different Se discharge mechanism is also highlighted by staircase potentio electrochem. impedance spectroscopy (SPEIS) that is an impedance measurement applied to each potential step. Volume expansion is targeted using different types of binders in which carboxyl methylcellulose-styrene butadiene rubber (CMC-SBR) delivers the highest reversible capacity and the best rate performance resulting from its high adhesion strength. To further improve the performances, fluoroethylene carbonate (FEC) is used as a film forming additive that preserves Na metal integrity proven by the Na-Na sym. cells and voltage relaxation upon cycling. As a whole, binders and electrolyte compositions are found to be the two crucial factors to obtain stable and high-capacity Na-Se cells. This study underlines that much effort needs to be put on the strategies to overcome volume expansion than that of Se confinement into porous cathode.

ChemElectroChem published new progress about Composites. 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