Tag: M.W=200-250

Bennett, Ellie published the artcileSize Dependent Optical Properties and Structure of ZnS Nanocrystals Prepared from a Library of Thioureas, SDS of cas: 143-24-8, the main research area is optical absorption zinc sulfide nanocrystal thiourea precursor size.

ZnS nanocrystals (λmax(1Se-1S3/2h) = 260-320 nm, d = 1.7-10.0 nm) are synthesized from Zn(O2CR)2 (O2CR = tetradecanoate, oleate and 2-hexyldecanoate), N,N′-disubstituted and N,N′,N′-trisubstituted thioureas, and P,P,N-trisubstituted phosphanecarbothioamides. The influence of precursor substitution, ligand sterics, and reaction temperature on the final nanocrystal size was evaluated. Using saturated hydrocarbon solvents and saturated aliphatic carboxylate ligands, polymeric byproducts could be avoided and pure ZnS nanocrystals isolated. Elevated temperatures, slower precursor conversion reactivity, and branched zinc 2-hexyldecanoate yield the largest ZnS nanocrystals. Carefully purified zinc carboxylate, rapidly converting precursors, and cooling the synthesis mixture following complete precursor conversion provide quasispherical nanocrystals with the narrowest shape dispersity. Nanocrystal sizes were measured using pair distribution function (PDF) anal. of X-ray scattering and scanning transmission electron microscopy (STEM) and plotted vs. the energy of their first excitonic optical absorption. The resulting empirical relationship provides a useful method to characterize the nanocrystal size from 1.7 to 4.0 nm using optical absorption spectroscopy.

Chemistry of Materials published new progress about Band gap. 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

Liang, Dong published the artcileInhibiting the shuttle effect using artificial membranes with high lithium-ion content for enhancing the stability of the lithium anode, Computed Properties of 143-24-8, the main research area is graphene oxide polystyrene sulfate lithium oxygen battery stability.

The low cycle stability of the lithium anode has become one of the bottlenecks restricting the development of lithium-metal batteries with high theor. energy d. Serious side reactions between lithium and electrolyte components are one of the key reasons for the poor cycle stability of the lithium anode. Herein, lithiated graphene oxide (GO-Li) and lithium poly(styrene sulfate) (PSS-Li) are used to construct composite membranes for the protection of the Li-anode, which shows long-term operation over 1000 h in Li-Li sym. cells in the presence of redox chems. that accelerate the cathodic reaction. The high content of Li+ of PSS-Li can not only inhibit the dissolution and diffusion of redox mols. in the membrane, but also improve the Li+ transport rate through the membrane. In our study, we take a lithium-oxygen (Li-O2) battery as the model device and 2,2,6,6-tetramethyl-1-piperidinyloxy as the model redox chem. to accelerate the cathodic reaction. Compared with conventional membranes, artificial membranes can effectively inhibit the side reaction between the redox mols. and the lithium anode. Consequently, the energy efficiency and cycle stability (over three times) of Li-O2 batteries are greatly improved. This provides an important theor. basis and tech. support for the design and preparation of membranes for high performance energy-conversion batteries.

Journal of Materials Chemistry A: Materials for Energy and Sustainability 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, Computed Properties of 143-24-8.

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

Hegemann, P. published the artcileStability of tetraglyme for reversible magnesium deposition from a magnesium aluminum chloride complex, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is stability tetraglyme reversible magnesium deposition aluminum chloride complex.

The electrochem. behavior of Mg deposition and stripping at Au-electrode in magnesium aluminum chloride complex (MACC) tetraglyme electrolyte was studied using differential electrochem. mass spectrometry (DEMS) and scanning tunneling microscopy (STM). During Mg deposition no dendrites are formed. MACC electrolyte supports reversible Mg deposition with high coulombic efficiency. Despite of the high coulombic efficiencies that was observed in MACC, appreciable ethylene formation due to the decomposition of tetraglyme was detected solely during Mg stripping. The mechanism of organic solvent decomposition will be discussed. This ethylene formation is quant. responsible for the missing charge balance of Mg-deposition and dissolution Possible origins will be discussed.

Journal of the Electrochemical Society published new progress about Electrodes. 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

Lin, En published the artcileA Class of Rigid-Flexible Coupling Crystalline Crosslinked Polymers as Vapomechanical Actuators, Related Products of ethers-buliding-blocks, the main research area is rigid flexible coupling crystalline crosslinked polyazomethine vapomech actuator; Covalent Organic Frameworks; Crosslinked Polymer; Crystalline; Smart Materials; Vapor Responsive.

Fabricating mech. responsive actuators that can efficiently convert external stimuli into mech. work is of great significance for real-world applications. Herein, we rationally design a class of rigid-flexible coupling crystalline crosslinked polymers (CCPs) to fabricate vapomechanically responsive actuators. Interfacial condensation reactions of flexible macromers with rigid monomers afford a series of freestanding CCP membranes. Notably, it is the first example where crosslinked polymers show high crystallinity and porosity. Moreover, the CCP membranes exhibit good mech. properties and interesting vapor-triggered actuation performance, which is reversible and repeatable. We find that the unusual polymer structures, high vapor sorption, and anisotropic membranes contribute to the directional deformation performance of the CCP actuators. The synthesis approach in this work provides new insights into the design and fabrication of smart materials for advanced applications.

Angewandte Chemie, International Edition published new progress about Actuators. 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

Tan, Tian published the artcilePrediction of infinite-dilution activity coefficients with neural collaborative filtering, HPLC of Formula: 143-24-8, the main research area is prediction infinite dilution activity coefficient neural collaborative filtering.

Accurate prediction of infinite dilution activity coefficient (γ∞) for phase equilibrium and process design is crucial. In this work, an exptl. γ∞ dataset containing 295 solutes and 407 solvents (21,048 points) is obtained through data integrating, cleaning, and filtering. The dataset is arranged as a sparse matrix with solutes and solvents as columns and rows, resp. Neural collaborative filtering (NCF), a modern matrix completion technique based on deep learning, is proposed to fully fill in the γ∞ matrix. Ten-fold cross-validation is performed on the collected dataset to test the effectiveness of the proposed NCF, proving that NCF outperforms the state-of-the-art phys. model and previous machine learning model. The completed γ∞ matrix makes solvent screening and extension of UNIFAC parameters possible. Taking two typical hard-to-sep. systems (benzene/cyclohexane and Me cyclopentane/n-hexane mixtures) as examples, the NCF-developed database provides high-throughput screening for separation systems in terms of solvent selectivity and capacity.

AIChE Journal published new progress about Algorithm. 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

Xue, Hairong published the artcileHollow mesoporous Fe2O3 nanospindles/CNTs composite: an efficient catalyst for high-performance Li-O2 batteries, COA of Formula: C10H22O5, the main research area is iron oxide carbon nanotube composite hydrolysis; Li-O2 batteries; carbon support; cathodic catalyst; hollow mesoporous structure; transition metal oxides.

The design of mesoporous or hollow transition metal oxide/carbon hybrid catalysts is very important for rechargeable Li-O2 batteries. Here, spindle-like Fe2O3 with hollow mesoporous structure on CNTs backbones (Fe2O3-HMNS@CNT) are prepared by a facile hydrolysis process combined with low temperature calcination. Within this hybrid structure, the hollow interior and mesoporous shell of the Fe2O3 nanospindles provide high sp. surface area and abundant catalytical active sites, which is also beneficial to facilitating the electrolyte infiltration and oxygen diffusion. Furthermore, the crisscrossed CNTs form a three-dimensional (3D) conductive network to accelerate and stabilize the electron transport, which leads to the decreasing internal resistance of electrode. As a cathodic catalyst for Li-O2 batteries, the Fe2O3-HMNS@CNT composite exhibits high specific capacity and excellent cycling stability (more than 100 cycles).

Frontiers in Chemistry (Lausanne, Switzerland) published new progress about Annealing. 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

Wang, Junbo published the artcileIn situ growth of Co3O4 on nitrogen-doped hollow carbon nanospheres as air electrode for lithium-air batteries, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is inSitu growth cobalt oxide nitrogen doped hollow carbon nanosphere; air electrode lithium battery.

Design and synthesis of efficient bifunctional electrocatalysts for both O reduction reaction and O evolution reactions are of great significant for metal-air batteries. Here, bifunctional catalysts consisting of Co3O4 nanocrystals and N-doped hollow C nanospheres are synthesized through in situ growth of Co3O4 nanocrystals on the surface of N-doped hollow C nanospheres. The observed Co-N bond formation is an indication of the nucleation of Co3O4 nanocrystals starting from N-sites in N-doped hollow C nanospheres. The resulted hybrids exhibit improved activity towards O reduction reaction compared to pristine N-doped hollow C nanospheres in terms of the 42 mV pos. shift of half-wave potential and comparable activity towards O evolution reactions with com. RuO2 and IrO2 catalysts. The thus-assembled Li-O battery delivers an initial discharge capacity of 3325 mAh/g at 100 mA/g using mixed gas of O and Ar (20% of O in volume). The battery fails after 27 discharge/charge cycles due to the accumulation of discharge products on electrode.

Journal of Alloys and Compounds published new progress about Annealing. 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

Byrne, Stephen A. published the artcileLate-stage modification of peptides and proteins at cysteine with diaryliodonium salts, Formula: C9H20O5, the main research area is cysteine diaryliodonium salt peptide protein modification.

The modification of peptides and proteins has emerged as a powerful means to efficiently prepare high value bioconjugates for a range of applications in chem. biol. and for the development of next-generation therapeutics. Herein, we report a novel method for the chemoselective late-stage modification of peptides and proteins at cysteine in aqueous buffer with suitably functionalised diaryliodonium salts, furnishing stable thioether-linked synthetic conjugates. The power of this new platform is showcased through the late-stage modification of the affibody zEGFR and the histone protein H2A.

Chemical Science published new progress about Arylation. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Formula: C9H20O5.

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

Berac, Christian M. published the artcileEvaluation of charge-regulated supramolecular copolymerization to tune the time scale for oxidative disassembly of β-sheet comonomers, Computed Properties of 23783-42-8, the main research area is peptide solid phase synthesis self Click chem assembly nanorod; nanorod peptide polymer beta sheet charge TEM CD; supramol structure peptide dendrimer nanorod oxidation disassembly kinetics; kinetic control; multicomponent supramolecular polymers; reactive oxygen species responsive materials; redox regulation; supramolecular chemistry.

A multistimuli-responsive supramol. copolymerization is reported. The copolymerization is driven by hydrogen bond encoded β-sheet-based charge co-assembly into 1D nanorods in water, using glutamic acid or lysine residues in either of the peptide comonomers. The incorporation of methionine as hydrophobic amino acid supports β-sheet formation, but oxidation of the thioether side-chain to a sulfoxide functional group destabilizes the β-sheet ordered domains and induces disassembly of the supramol. polymers. Using H2O2 as reactive oxygen species, the time scale and kinetics of the oxidative disassembly are probed. Compared to the charge neutral homopolymers, it is found that the oxidative disassembly of the charged ampholytic copolymers is up to two times faster and is operative at neutral pH. The strategy is therefore an important addition to the growing field of amphiphilic polythioether containing (macro)mol. building blocks, particularly in view of tuning their oxidation induced disassembly which tends to be notoriously slow and requires high concentrations of reactive oxygen species or acidic reaction media.

Macromolecular Rapid Communications published new progress about Azidation. 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

Tripathi, Balram published the artcileBiFeO3 Coupled Polysulfide Trapping in C/S Composite Cathode Material for Li-S Batteries as Large Efficiency and High Rate Performance, Category: ethers-buliding-blocks, the main research area is carbon sulfur composite; bismuth iron oxide polysulfide composite cathode lithium sulfur battery.

We demonstrated the efficient coupling of BiFeO3 (BFO) ferroelec. material within the carbon-sulfur (C-S) composite cathode, where polysulfides are trapped in BFO mesh, reducing the polysulfide shuttle impact, and thus resulting in an improved cyclic performance and an increase in capacity in Li-S batteries. Here, the built-in internal field due to BFO enhances polysulfide trapping. The observation of a difference in the diffusion behavior of polysulfides in BFO-coupled composites suggests more efficient trapping in BFO-modified C-S electrodes compared to pristine C-S composite cathodes. The X-ray diffraction results of BFO-C-S composite cathodes show an orthorhombic structure, while Raman spectra substantiate efficient coupling of BFO in C-S composites, in agreement with SEM images, showing the interconnected network of submicron-size sulfur composites. Two plateaus were observed at 1.75 V and 2.1 V in the charge/discharge characteristics of BFO-C-S composite cathodes. The observed capacity of ∼1600 mAh g-1 in a 1.5-2.5 V operating window for BFO30-C10-S60 composite cathodes, and the high cyclic stability substantiate the superior performance of the designed cathode materials due to the efficient reduction in the polysulfide shuttle effect in these composite cathodes.

Energies (Basel, Switzerland) published new progress about Batteries. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Category: ethers-buliding-blocks.

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