Month: December 2022

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

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

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

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

Rausaria, Smita published the artcileManganese(III) Complexes of Bis(hydroxyphenyl)dipyrromethenes Are Potent Orally Active Peroxynitrite Scavengers, SDS of cas: 127972-00-3, the main research area is manganese chelate biscyclohexano fused bishydroxyphenyldipyrromethene preparation crystal structure; oral analgesic activity manganese chelate biscyclohexano fused bishydroxyphenyldipyrromethene; peroxynitrite scavenger manganese chelate biscyclohexano fused bishydroxyphenyldipyrromethene.

The authors report biscyclohexano-fused Mn(III) complexes of bis(hydroxyphenyl)dipyrromethenes, complexes I (R1 = H, Me, or F, 4a-c, resp.,) as potent and orally active peroxynitrite scavengers. Complexes 4a-c reduce peroxynitrite through a two-electron mechanism, thereby forming the corresponding Mn(V)O species, which were characterized by UV, NMR, and LC-MS methods. Mn(III) complex 4b and its strained boron (BODIPY) analog 9b were analyzed by x-ray crystallog. Finally, complex 4a is an orally active and potent analgesic in a model carrageenan-induced hyperalgesia known to be driven by the over-production of peroxynitrite.

Journal of the American Chemical Society published new progress about Analgesics. 127972-00-3 belongs to class ethers-buliding-blocks, name is 2-Methoxy-5-methylphenylboronic acid, and the molecular formula is C8H11BO3, SDS of cas: 127972-00-3.

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

Demuner, Antonio Jacinto published the artcileThe Fungal Phytotoxin Alternariol 9-Methyl Ether and Some of Its Synthetic Analogues Inhibit the Photosynthetic Electron Transport Chain, SDS of cas: 127972-00-3, the main research area is Alternaria phytotoxin alternariol methyl ether analog preparation inhibition photosynthesis.

Alternariol and monomethylalternariol are natural phytotoxins produced by some fungal strains, such as Nimbya and Alternaria. These substances confer virulence to phytopathogens, yet no information is available concerning their mode of action. Here it is shown that in the micromolar range alternariol 9-Me ether is able to inhibit the electron transport chain (IC50 = 29.1 ± 6.5 μM) in isolated spinach chloroplasts. Since its effectiveness is limited by poor solubility in water, several alternariol analogs were synthesized using different aromatic aldehydes. The synthesized 6H-benzo-[c]-cromen-6-ones, 5H-chromene-[4,3-b]-pyridin-5-one, and 5H-chromene-[4,3-c]-pyridin-5-one also showed inhibitory properties, and three 6H-benzo-[c]-cromen-6-ones were more effective (IC50 = 12.8-22.8 μM) than the lead compound Their addition to the culture medium of a cyanobacterial model strain was found to inhibit algal growth, with a relative effectiveness that was consistent with their activity in vitro. In contrast, the growth of a nonphotosynthetic plant cell culture was poorly affected. These compounds may represent a novel lead for the development of new active principles targeting photosynthesis.

Journal of Natural Products published new progress about Alternaria. 127972-00-3 belongs to class ethers-buliding-blocks, name is 2-Methoxy-5-methylphenylboronic acid, and the molecular formula is C8H11BO3, SDS of cas: 127972-00-3.

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

Hu, Xiaomei published the artcileModification of thionucleobases in ionic liquids, SDS of cas: 622-86-6, the main research area is ionic liquid catalyst thioalkylation nucleobase preparation thionucleobase.

A simple method was established for the preparation of thio-substituted thionucleobases using room temperature ionic liquids (RTILs) such as 1-butyl-3-methylimidazolium trifluoroacetate [BMIM]+[CF3COO]- and 1-methoxyethyl-3-methylimidazolium trifluoroacetate [MeOEtMIM]+[CF3COO]- as solvents and catalysts without any other catalyst. These reactions proceeded efficiently in RTILs with excellent yield of products. RTILs can be recycled and reused effectively without further purification

Journal of Chemistry published new progress about Alkylation. 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, SDS of cas: 622-86-6.

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

Nantaba, Florence published the artcileTemporal dynamics and ecotoxicological risk assessment of personal care products, phthalate ester plasticizers, and organophosphorus flame retardants in water from Lake Victoria, Uganda, COA of Formula: C11H16O2, the main research area is ecotoxicol risk assessment water pollution Lake Victoria Uganda; East africa; Flame retardants; Lake victoria; Personal care products; Plasticizers; Risk assessment.

For the first time the occurrence of 25 organic micropollutants (OMPs) including, eleven personal care products (PCPs), six phthalate ester plasticizers (PEPs) and eight organophosphorus flame retardants (OPFRs) was investigated in 72 water samples obtained from five bays in the Uganda sector of Lake Victoria. In addition, an assessment of the potential ecotoxic risk of the target OMPs to aquatic organisms was conducted. Water samples were analyzed for the target OMPs using gas chromatog. coupled with GC/MS. All the target PCPs were found in all the water samples with the exception of musk ketone and 2,6-di-tert-butylphenol. Triclosan, benzophenone, and 4-methylbenzylidine camphor were the most predominant PCPs. All the six plasticizers were found in all the water samples with di-Bu phthalate, and bis-(2-ethylhexyl) phthalate detected at the highest concentrations Tricresyl phosphate, tris-(2-chloroethyl) phosphate and tri-Ph phosphate were the most dominant OPFRs. The highest concentrations of OMPs were recorded in Murchison and Thurston Bays, presumably due to industrial wastewater effluents from the highly industrialized localities of the two Bays. Ecotoxicol. risk assessment showed that PCPs (triclosan, musk ketone, and 4-MBC), plasticizers (di-Bu phthalate, bis-(2-ethylhexyl) adipate and bis-(2-ethylhexyl) phthalate) and OPFRs (tricresyl phosphate, tri-Ph phosphate and tris-(2-chloroethyl) phosphate) pose a high ecotoxic risk to lives of aquatic organisms.

Chemosphere published new progress about Alkalinity. 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, COA of Formula: C11H16O2.

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