Tag: M.W=200-250

Wang, Miaomiao published the artcileSuspect Screening and Chemical Profile Analysis of Storm-Water Runoff Following 2017 Wildfires in Northern California, Application of 2,5,8,11,14-Pentaoxapentadecane, 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). 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

Sapotta, Meike published the artcileA Water-Soluble Perylene Bisimide Cyclophane as a Molecular Probe for the Recognition of Aromatic Alkaloids, Quality Control of 23783-42-8, the main research area is perylene bisimide cyclophane mol probe aromatic alkaloid; alkaloids; cyclophanes; fluorescence probes; host-guest systems; perylene bisimides.

Herein, we report a water-soluble macrocyclic host based on perylene bisimide (PBI) chromophores that recognizes natural aromatic alkaloids in aqueous media by intercalating them into its hydrophobic cavity. The host-guest binding properties of our newly designed receptor with several alkaloids were studied by UV/Vis and fluorescence titration experiments as the optical properties of the chromophoric host change significantly upon complexation of guests. Structural information on the host-guest complexes was obtained by 1D and 2D NMR spectroscopy and mol. modeling. Our studies reveal a structure-binding property relationship for a series of structurally diverse aromatic alkaloids with the new receptor and higher binding affinity for the class of harmala alkaloids. To our knowledge, this is the first example of a chromophoric macrocyclic host employed as a mol. probe for the recognition of aromatic alkaloids.

Angewandte Chemie, International Edition published new progress about Alkaloids Role: ANT (Analyte), ANST (Analytical Study) (aromatic). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Quality Control of 23783-42-8.

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

Sun, Tao published the artcileSolvation Effect on the Improved Sodium Storage Performance of N-Heteropentacenequinone for Sodium-Ion Batteries, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is heteropentacenequinone sodium ion battery solvation effect; electrolytes; organic electrode; sodium-ion batteries; solvation effect.

The performance of electrode material is correlated with the choice of electrolyte, however, how the solvation has significant impact on electrochem. behavior is underdeveloped. Herein, N-heteropentacenequinone (TAPQ) is investigated to reveal the solvation effect on the performance of sodium-ion batteries in different electrolyte environment. TAPQ cycled in diglyme-based electrolyte exhibits superior electrochem. performance, but experiences a rapid capacity fading in carbonate-based electrolyte. The function of solvation effect is mainly embodied in two aspects: one is the stabilization of anion intermediate via the compatibility of electrode and electrolyte, the other is the interfacial electrochem. characteristics influenced by solvation sheath structure. By revealing the failure mechanism, this work presents an avenue for better understanding electrochem. behavior and enhancing performance from the angle of solvation effect.

Angewandte Chemie, International Edition published new progress about Aromatic compounds 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, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

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

Ouhib, Farid published the artcileInfluence of the Cyclic versus Linear Carbonate Segments in the Properties and Performance of CO2-Sourced Polymer Electrolytes for Lithium Batteries, Related Products of ethers-buliding-blocks, the main research area is cyclic carbonate segment polymer electrolyte lithium battery.

Polycarbonates bearing linear carbonate linkages and polyether segments have demonstrated to be highly attractive solid electrolyte candidates for the design of safe energy storage devices, for example, lithium metal batteries. In this contribution, we are studying the influence of the introduction of some cyclic carbonate linkages within the polymer backbone on the electrolyte properties. We first describe the synthesis of polycarbonates/polyethers containing different contents of both linear and cyclic carbonate linkages within the chain by the copolymerization of a highly reactive CO2-based monomer (bis(α-alkylidene cyclic carbonate)) with poly(ethylene glycol) diol and a dithiol at room temperature We then explore the influence of the content of the cyclic carbonates and the loading of the polymer by lithium bis(trifluoromethane) sulfonimide (LiTFSI) on the electrolyte properties (glass transition and melting temperatures, ion conductivity, and diffusivity). The best electrolyte candidate is characterized by a linear/cyclic carbonate linkage ratio of 82/18 when loaded with 30 weight % LiTFSI. It exhibits an ion conductivity of 5.6 × 10-5 S cm-1 at 25° (7.9 × 10-4 S cm-1 at 60°), which surpasses by 150% (424% at 60°) the conductivity measured for a similar polymer bearing linear carbonate linkages only. It is also characterized by a high oxidation stability up to 5.6 V (vs. Li/Li+). A self-standing membrane is then constructed by impregnating a glass fiber filter by this optimal polymer, LiTFSI, and a small amount of a plasticizer (tetraglyme). Cells are then assembled by sandwiching the membrane between a C-coated LiFePO4 (LFP) as the cathode and lithium as the anode and counter electrode. The cycling performances are evaluated at 0.1 C at 60° and room temperature for 40 cycles. Excellent cycling performances are noted with 100% of the theor. capacity (170 mAh g-1) at 60° and 73.5% of the theor. capacity (125 mAh g-1) at 25°.

ACS Applied Polymer Materials published new progress about Cyclic carbonates 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, Related Products of ethers-buliding-blocks.

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

Xiao, Qiang published the artcileStructural guidelines for stabilization of α-helical coiled coils via PEG stapling, Product Details of C9H20O5, the main research area is guideline helical coiled PEG stapling.

Macrocyclization or stapling is one of the most well-known and generally applicable strategies for enhancing peptide/protein conformational stability and target binding affinity. However, there are limited structure- or sequence-based guidelines for the incorporation of optimal interhelical staples within coiled coils: the location and length of an interhelical staple is either arbitrarily chosen or requires significant optimization. Here we explore the impact of interhelical PEG stapling on the conformational stability and proteolytic resistance of a model disulfide-bound heterodimeric coiled coil. We demonstrate that (1) interhelical PEG staples are more stabilizing when placed farther from an existing disulfide crosslink; (2) e/g ′ staples are more stabilizing than f/b ′ or b/c ′ staples; (3) PEG staples between different positions have different optimal staple lengths; (4) PEG stapling tolerates variation in the structure of the PEG linker and in the mode of conjugation; and (5) the guidelines developed here enable the rational design of a stabilized PEG-stapled HER-2 affibody with enhanced conformational stability and proteolytic resistance.

RSC Chemical Biology published new progress about Disulfides Role: BSU (Biological Study, Unclassified), BIOL (Biological 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, Product Details of C9H20O5.

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

Tan, Jihuai published the artcileDirect transformation of fatty acid-derived monomers from dimer acid manufacturing into valuable bio-plasticizers with high plasticization and compatibilization, Category: ethers-buliding-blocks, the main research area is dimer acid nitrile butadiene rubber plasticization compatibilization property.

Direct transformation of monomer fatty acids derived from the dimer acid manufacturing into high value-added green plasticizers represents a sustainable approach for reutilizing industrial wastes. However, this process is challenging due to the few double bonds and long-chain alkyl in monomer fatty acid-based derivatives, resulting in poor compatibility with polymer matrix and inferior plasticization. Herein, we develop a sustainable and low-cost strategy via direct esterification between monomer fatty acids and polyethylene glycol Me ether to produce plasticizers featured by high plasticization and compatibilization. The performances of monomer acid-based ethoxylated esters as resulting plasticizers for nitrile butadiene rubber were highly structure-dependent. Extensive experiments demonstrated that oxethyl unit played critical roles in both improving the compatibility between monomer acid-based ethoxylated esters and nitrile butadiene rubber and in promoting the dispersion of carbon black in nitrile butadiene rubber matrix. Specially, the processing, freezing resistance, oil resistance, thermal and mech. stabilities of nitrile butadiene rubber plasticized by monomer acid-based ethoxylated esters with three or four oxethyl units were comparable or better than those of nitrile butadiene rubber blended with dioctyl phthalate. This study opens a simple, general and industrialized strategy to produce valuable and sustainable plasticizers as alternatives of toxic dioctyl phthalate.

Journal of Cleaner Production published new progress about Carbon black Role: MOA (Modifier or Additive Use), USES (Uses) (N 550, N 770). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Category: ethers-buliding-blocks.

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

Bloi, Luise Maria published the artcileSodium Sulfide Cathodes Superseding Hard Carbon Pre-sodiation for the Production and Operation of Sodium-Sulfur Batteries at Room Temperature, Formula: C10H22O5, the main research area is sodium sulfide battery carbon cathode superseding fabrication morphol.

This study demonstrates for the first time a room temperature sodium-sulfur (RT Na-S) full cell assembled based on a pristine hard carbon (HC) anode combined with a nanostructured Na2S/C cathode. The development of cells without the demanding, time-consuming and costly pre-sodiation of the HC anode is essential for the realization of practically relevant RT Na-S prototype batteries. New approaches for Na2S/C cathode fabrication employing carbothermal reduction of Na2SO4 at varying temperatures (660 to 1060°C) are presented. Initial evaluation of the resulting cathodes in a dedicated cell setup reveals 36 stable cycles and a capacity of 740 mAh gS-1, which correlates to ~85% of the maximum value known from literature on Na2S-based cells. The Na2S/C cathode with the highest capacity utilization is implemented into a full cell concept applying a pristine HC anode. Various full cell electrolyte compositions with fluoroethylene carbonate (FEC) additive have been combined with a special charging procedure during the first cycle supporting in situ solid electrolyte interphase (SEI) formation on the HC anode to obtain increased cycling stability and cathode utilization. The best performing cell setup has delivered a total of 350 mAh gS-1, representing the first functional full cell based on a Na2S/C cathode and a pristine HC anode today.

Advanced Energy Materials 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, Formula: C10H22O5.

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

Li, Wenbiao published the artcileAnthraquinone-Catalyzed TEMPO Reduction to Realize Two-Electron Energy Storage of Poly(TEMPO-methacrylate), Quality Control of 143-24-8, the main research area is anthraquinone catalyzed reduction electron energy storage poly methacrylate.

2,2,6,6-Tetramethylpiperidine-1-oxyl (TEMPO) functional polymers are a type of organic electroactive material featuring a two-electron redox process. However, the electrochem. reduction of TEMPO (TEMPO•/-) is rarely adopted for energy storage due to its slow reaction kinetics. Here, we report using anthraquinone (AQ) as an organic redox mediator to promote TEMPO reduction kinetics. The catalytic effect of AQ is verified by electrochem. in situ FTIR spectroscopy in a model three-electrode system and further evidenced by cyclic voltammetry and chronoamperometry, providing a turnover frequency of 69 h-1. To exemplify the AQ catalytic effect in energy storage performance, we incorporate AQ groups into a typical TEMPO polymer (i.e., poly(TEMPO-methacrylate), PTMA). The AQ-catalyzed TEMPO reduction and AQ/carbon π-π interaction synergistically reduce the heterogeneous charge transfer resistance and accelerate the kinetics of the TEMPO•/- process in the PTMA electrode. The half-cell tests of the AQ functional PTMA show two prominent discharge plateaus with an initial capacity of 174 mAh g-1 and a 0.18% capacity loss per cycle. Moreover, the discharge capacity based on the TEMPO•/- couple is about 85 mAh g-1, 30% higher than that of the pristine PTMA. This new strategy could be widely applied to various organic redox systems to enhance their electrochem. kinetics and particularly improve the energy storage performance of organic polymer redox materials.

ACS Energy Letters 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, Quality Control of 143-24-8.

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

Li, Zhejun published the artcileDesigning Effective Solvent-Catalyst Interface for Catalytic Sulfur Conversion in Lithium-Sulfur Batteries, Name: 2,5,8,11,14-Pentaoxapentadecane, the main research area is solvent catalyst interface effect polysulfide reduction sulfur lithium battery.

S-based redox materials are promising next-generation energy storage solutions Identifying electrode and electrolyte properties that facilitate polysulfide reduction reactions is critical for rational material designs for S-based batteries. The authors reveal that the effectiveness of the polysulfide reduction is governed by the resolved binding strength of polysulfide on the electrode surface, which is dictated by the competition between electrode’s polysulfide chemisorption strength and solvent’s polysulfide solvation strength. Using Ti-based model compounds (TiX) as examples, the polysulfide reduction kinetics and S use increase with increasing polysulfide chemisorption strength of TiX, which can be associated with the decreasing electronegativity of nonmetal element (X). Strong coordinating solvent reduces catalyst’s efficacy by reducing the binding strength between polysulfide and the catalysts, highlighting that a weak solvent coordination is a critical selection criterion for effective catalysis in Li-S batteries. The study reveals phys. origins controlling the catalytic processes of polysulfide reduction reactions and unravels the interplay of solvent-polysulfide-catalyst competition for achieving higher-energy and reversible S-based energy storage.

Chemistry of Materials 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, Name: 2,5,8,11,14-Pentaoxapentadecane.

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

Wang, Wenjuan published the artcileRational Construction of Sulfur-Deficient NiCo2S4-x Hollow Microspheres as an Effective Polysulfide Immobilizer toward High-Performance Lithium/Sulfur Batteries, Product Details of C10H22O5, the main research area is hollow microsphere nickel cobalt sulfide polysulfide immobilizer; lithium sulfur battery.

The synergistic strategy combining architectural design with defect engineering in transition-metal sulfides offers a promising opportunity to realize high-efficiency polysulfide adsorption/conversion surface catalysis in lithium/sulfur (Li/S) batteries. Here, defect-rich yolk-shell hollow spheres composed of ultrafine NiCo2S4-x nanoparticles as sulfur hosts prepared by an anion-exchange method are reported. The elaborate design of sulfur defects endows the NiCo2S4-x hollow spheres with significantly enhanced electronic conductivity and superior affinity for polysulfides as well as expedited sulfur conversion. Meanwhile, the unique yolk-shell NiCo2S4-x hollow sphere structure provides large cavities that not only increase sulfur storage but also relieve the electrode volume expansion during cycling. Combining these favorable features, the NiCo2S4-x-hosted sulfur cathode revealed enhanced cycling stability, corresponding to a negligible capacity fading rate of 0.0754% per cycle after 500 cycles at 1 C, and achieved an outstanding rate capability (628.9 mA-h g-1 up to 5 C).

ACS Applied Energy Materials 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