Month: March 2021

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 10272-07-8, Name is 3,5-Dimethoxyaniline, SMILES is NC1=CC(OC)=CC(OC)=C1, belongs to ethers-buliding-blocks compound. In a document, author is Xu, Chuanhui, introduce the new discover, Product Details of 10272-07-8.

Strengthened, conductivity-tunable, and low solvent-sensitive flexible conductive rubber films with a Zn2+-crosslinked one-body segregated network

A high-performance flexible conductive material based on cheap carboxymethyl chitosan (CMCS) and carboxylated styrene-butadiene rubber (XSBR) was fabricated via latex film-forming technique. Nano zinc oxide (ZnO) was introduced to react with CMCS, generating a Zn2+-crosslinked CMCS one-body segregated (Zn2+-COBS) network. Differing from reported conductive fillers with segregated structures, this Zn2+-COBS network was a continuous framework structure, which could be turned into conducting network by absorbing moisture. Superior tensile strength of 22.6 MPa was achieved with 30 wt% CMCS and 2.5 wt% ZnO owing to the reinforced concrete structure effect of Zn2+-COBS architecture. The order of volume resistance (Rv) of the films could be tailored between x 10(8) and x 10(4) Omega cm by changing the water content from 0 to similar to 20%, although at 20% water content the strength decreased to about 2 MPa. Particularly, the material with 30 wt% CMCS and 2.5 wt% ZnO achieved a Rv of 7.8 x 10(3) Omega cm with 18.7% water content. Thanks to the abundant hydrogen bonding interactions between CMCS chains, this special architecture provided a strong swelling restriction on the rubber matrix and dramatically improved the conducting stability of film in solvents. The R-t/R-0 in toluene, petroleum ether and anhydrous alcohol for 2 h were only 7.52, 1.35 and 1.47 for the films with a water content of 4.9%, 5.3% and 8.8%, respectively. These results demonstrate a promising method to fabricate an economical, conductivity-tunable, and flexural film material with potential applications in humidity detectors or in solvent environments.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 10272-07-8 is helpful to your research. Product Details of 10272-07-8.

Application of 1163-19-5, Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. The appropriate choice of redox mediator can avoid electrode passivation and overpotential. 1163-19-5, Name is 6,6′-Oxybis(1,2,3,4,5-pentabromobenzene), SMILES is BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC2=C(Br)C(Br)=C(Br)C(Br)=C2Br, belongs to ethers-buliding-blocks compound. In a article, author is Amini, Kasra, introduce new discover of the category.

The synergic effects of metakaolin and polycarboxylate-ether on dispersion of graphene oxide in cementitious environments and macro- level properties of graphene oxide modified cement composites

Studying the effects of pozzolanic materials such as silica fume, fly ash, and metakaolin (MK) on dispersion of graphene oxide (GO) in cementitious environments has attracted interest in recent years. In this research, the potential of MK particles as an impediment against GO agglomeration in high alkaline environments is investigated. Despite the exhibited results in previous studies that the particles of pozzolans can inhibit the agglomeration of GO in cementitious environments by consuming Ca(OH)(2) besides the mechanical separation of GO sheets, the results of the present study revealed that MK particles alone could not prevent GO nanosheets from clustering, physically or chemically. However, based on UV-vis spectroscopy and SEM-EDS analysis results, the incorporation of MK particles with Polycarboxylateether (PCE) significantly ameliorates the dispersion and time-dependent stability of GO nanosheets in simulated cement pore solution. Indeed, in this case, the anchoring characteristic of the negative surface charge of MK particles besides the steric hindrance effect of PCE’s side chains can reduce the possibility of the interaction between GO nanosheets and calcium ions in cementitious environments. Moreover, the improved stability of MK-PCE modified GO suspensions ensures the permanence of the desired dispersion of GO in the alkaline medium of cement composites, which is advantageous for enhancing the mechanical and transport properties of cement composites. In this research, the results of compressive strength, flexural strength, flexural modulus, toughness, and ultrasonic pulse velocity tests on MK-GO incorporated cement paste samples after 28 days of curing showed an enhancement by 27.6%, 36.3%, 49.8%, 42.0%, and 5.0%, respectively compared to the reference sample. This improvement is primarily due to the beneficial effects of MK-PCE to make GO play a better reinforcing role in cement composites. (C) 2020 Elsevier Ltd. All rights reserved.

Application of 1163-19-5, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 1163-19-5 is helpful to your research.

Let¡¯s face it, organic chemistry can seem difficult to learn, Safety of 1,4-Dimethoxybenzene, Especially from a beginner¡¯s point of view. Like 150-78-7, Name is 1,4-Dimethoxybenzene, molecular formula is ethers-buliding-blocks, belongs to ethers-buliding-blocks compound. In a document, author is Arakawa, Yuki, introducing its new discovery.

Carbonyl- and thioether-linked cyanobiphenyl-based liquid crystal dimers exhibiting twist-bend nematic phases

A homologous series of ketone-type liquid crystal (LC) dimers, namely carbonyl- and thioether-linked cyanobiphenyl-based bent LC dimers (CBCOnSCB), with odd numbers of alkylene spacers (n = 3, 5, 7, and 9), was developed. CBCOnSCB dimers (n = 3, 5, and 7) formed a twist-bend nematic (N-TB) phase below the nematic (N) phase. The N to N-TB phase-transition temperatures of CBCOnSCB were higher than those of previously reported symmetric bis(thioether)-linked CBSnSCB and asymmetric ether- and thioether-linked CBOnSCB analogs. Compared to the vitrifiable CBSnSCB and CBOnSCB analogs, CBCOnSCB tended to crystallize. Single-crystal X-ray structural analysis of CBCO5SCB was also performed. (C) 2020 Elsevier Ltd. All rights reserved.

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Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 1836-62-0, Name is 2-(2-Methoxyphenoxy)ethylamine, SMILES is COC1=CC=CC=C1OCCN, belongs to ethers-buliding-blocks compound. In a document, author is Wang, Gang, introduce the new discover, Recommanded Product: 1836-62-0.

Novel amphoteric ion exchange membranes by blending sulfonated poly(ether ether ketone) with ammonium polyphosphate for vanadium redox flow battery applications

A novel amphoteric ion exchange membrane for vanadium redox flow battery (VRFB) was explored by blending sulfonated poly(ether ether ketone) (SPEEK) and ammonium polyphosphate (APP). The high-stability flame retardant of cross-linked APP with a large number of NH4+ groups was first introduced into SPEEK membrane. It was observed that the addition of APP with special structure could achieve a good balance between proton conductivity and vanadium ions permeability. The abundant NH4+ in APP could block the penetration of vanadium ions by Donnan/Manning exclusion effect and ionic crossing networks due to the ionic bonds between cation and anion groups, and specially a small amount of APP within 5% could remarkably improve the proton conductivity of pristine SPEEK membrane might be ascribed to the unique fast proton transport channels formed by hydrogen bond networks and particular micro-phase separation as a result of interaction between SPEEK and APP. When 5% APP was blended, the SPEEK/APP-5% (S/APP-5%) amphoteric membrane showed a higher selectivity of 20.87 x 10(4) S min/cm(3) (with a good proton conductivity of 0.075 S/cm and a lower VO2+ permeability of 3.45 x 10(-7) cm(2)/ min) and presented better thermal and chemical stability compared to Nafion115 and SPEEK membranes. The VRFB single cell assembled with S/APP-5% amphoteric membrane exhibited more excellent performance than that of Nafion115 and pristine SPEEK membranes, which revealed a higher coulombic efficiency of 96.3%-98.3%, comparable voltage efficiency of 88.4%-78.7% and higher energy efficiency of 85.1%-77.4% from 40 to 80 mA/cm(2), respectively, and showed relatively good stability of the efficiency up to 50 cycles at 60 mA/cm(2). The results demonstrated that the designed S/APP amphiprotic membrane of outstanding selectivity, high battery efficiency, and good durability is a prospected VRFB separator.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1836-62-0 is helpful to your research. Recommanded Product: 1836-62-0.

#REF!

What happens when pesticides are solubilised in binary ionic/zwitterionic-nonionic mixed micelles?

Hypothesis: Surfactants have been widely used as adjuvants in agri-sprays to enhance the solubility of pesticides in foliar spray deposits and their mobility through leaf cuticles. Previously, we have characterised pesticide solubilisation in nonionic surfactant micelles, but what happens when pesticides become solubilised in anionic, cationic and zwitterionic and their mixtures with nonionic surfactants remain poorly characterised. Experiments: To facilitate characterisations by SANS and NMR, we used nonionic surfactant hexaethylene glycol monododecyl ether (C12E6), anionic sodium dodecylsulphate (SDS), cationic dodecyltrimethylammonium bromide (DTAB) and zwitterionic dodecylphosphocholine (C12PC) as model adjuvant systems to solubilise 3 pesticides, Cyprodinil (CP), Azoxystrobin (AZ) and Difenoconazole (DF), representing different structural features. The investigation focused on the influence of solubilisates in driving changes to the micellar nanostructures in the absence or presence of electrolytes. NMR and NOESY were applied to investigate the solubility and location of each pesticide in the micelles. SANS was used to reveal subtle changes to the micellar structures due to pesticide solubilisation with and without electrolytes. Findings: Unlike nonionic surfactants, the ionic and zwitterionic surfactant micellar structures remain unchanged upon pesticide solubilisation. Electrolytes slightly elongate the ionic surfactant micelles but have no effect on nonionic and zwitterionic surfactants. Pesticide solubilisation could alter the structures of the binary mixtures of ionic/zwitterionic and ionic/nonionic micelles by causing elongation, shell shrinkage and dehydration, with the exact alteration being determined by the molar ratio in the mixture. (C) 2020 Published by Elsevier Inc.

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Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 1163-19-5, Name is 6,6′-Oxybis(1,2,3,4,5-pentabromobenzene), molecular formula is , belongs to ethers-buliding-blocks compound. In a document, author is Wang, Zhigang, COA of Formula: C12Br10O.

Exploring 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether as a high voltage electrolyte solvent for 5-V Li2CoPO4F cathode

1,1,2,2-Tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (F-EPE) is investigated as a cosolvent for high voltage electrolytes of Li2CoPO4F. Compared with conventional carbonate-based electrolyte (1-M LiPF6 ethylene carbonate [EC]/dimethyl carbonate [DMC] [1:1, wt:wt]), 1 M LiPF6 F-EPE/DMC (1:2, wt:wt) exhibits significantly improved antioxidant ability in high voltage, thus greatly enhances the electrochemical performance of 5.0-V Li2CoPO4F/Li cells. Linear sweep voltammetry (LSV) and charging/discharging tests demonstrate that the F-EPE/DMC electrolyte possesses both a high oxidation voltage up to 6.2 V vs. Li+/Li on Pt electrode and superior oxidation stability on Li2CoPO4F cathode. Benefiting from its high antioxidant ability, the capacity retention of Li2CoPO4F cathode increases from 15% in EC/DMC electrolyte to 51% in F-EPE/DMC electrolyte after 100 cycles at 1 C between 3.0 and 5.4 V. Moreover, differential capacity (dQ/dV) analysis, electrochemical impedance spectroscopy, ex situ X-ray diffraction, and X-ray photoelectron spectroscopy are used to analyze the effects of F-EPE/DMC electrolyte on the improved electrochemical performance. It is illustrated that the high stability of F-EPE/DMC electrolyte effectively inhibits the oxidative decomposition of the electrolyte on Li2CoPO4F electrode above 5.0 V and suppresses the damage to the surface of Li2CoPO4F, thus alleviate the increase in electrode polarization and cell impedance.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1163-19-5, in my other articles. COA of Formula: C12Br10O.

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , SDS of cas: 93-04-9, 93-04-9, Name is 2-Methoxynaphthalene, molecular formula is C11H10O, belongs to ethers-buliding-blocks compound. In a document, author is Chen, Dequan, introduce the new discover.

Direct conversion of ester bond-rich waste plastics into hard carbon for high-performance sodium storage

Disordered hard carbon (HC) has shown potential as the most promising anode materials for sodium-ion batteries (SIBS). Pyrolyzing waste plastics is a sustainable alternative to obtain HC. However, most plastics will completely decompose without carbon residue or transform into highly graphitic carbon during the carbonation process because of lacking oxygen functional groups. Hence, ester bond-rich waste engineering plastics, polycarbonate (PC), and polyethylene terephthalate (PET) were selected and directly converted into HC by a simple pyrolysis method. The PC and PET-derived carbon anodes (PC-HC and PET-HC) exhibit high reversible capacities of 327 and 342 mAh.g(-1) at 20 mA.g(-1) with remarkable initial coulombic efficiency (ICE) of 84.7% and 86.1%, respectively. Particularly, the carbon samples have no severe capacities decay after 140 cycles at 100 mA.g(-1). This work provides a cost-effective, easily large-scale, and eco-friendly route to fabricate HC anodes for grid-scale energy storage. (C) 2020 Elsevier Ltd. All rights reserved.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 93-04-9. SDS of cas: 93-04-9.

In an article, author is Wang, Yu, once mentioned the application of 150-78-7, Quality Control of 1,4-Dimethoxybenzene, Name is 1,4-Dimethoxybenzene, molecular formula is C8H10O2, molecular weight is 138.16, MDL number is MFCD00008401, category is ethers-buliding-blocks. Now introduce a scientific discovery about this category.

Microphase separation/crosslinking competition-based ternary microstructure evolution of poly(ether-b-amide)

The temperature dependence of the rheological properties of poly(ether-b-amide) (PEBA) segmented copolymer under oscillatory shear flow has been investigated. The magnitude of the dynamic storage modulus is affected by the physical microphase separation and irreversible crosslinking network, with the latter spontaneously forming between the polyamide segments and becoming the dominant factor in determining the microstructural evolution at temperatures well above the melting point of PEBA. From the rheological results, the initial temperature of the rheological properties dominated by the microphase separation and crosslinking (T-cross) structures were determined, respectively. Based on the two obtained temperatures, the microstructure evolution upon the heating can be separated into the ternary microstructure domains: homogenous (temperature below ), microphase separation dominating (between and T-cross), and crosslinking dominating domains (above T-cross). When the PEBA is heated to above T-cross, the content of crosslinking network increases with time and temperature, leading to an irreversible and non-negligible influence on the rheological, crystallization, and mechanical properties. A more pronounced strain-hardening phenomenon during the uniaxial stretching is observed for the sample with a higher content of crosslinking network.

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Reference of 578-57-4, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 578-57-4, Name is 1-Bromo-2-methoxybenzene, SMILES is COC1=CC=CC=C1Br, belongs to ethers-buliding-blocks compound. In a article, author is Majnooni, Mohammad Bagher, introduce new discover of the category.

Rapid and sensitive UHPLC-DAD method for simultaneous determination of sofosbuvir and ledipasvir in human serum

Today, the direct-acting antiviral agents (DAAs) such as sofosbuvir (SOF) and ledipasvir (LED) are widely used to treat the hepatitis virus infection. The aim of this study was to develop a rapid, simple and valid method for simultaneous determination of SOF and LED in human plasma for bioavailability and pharmacokinetic studies. Chromatographic analysis was performed on the C-18 column (Blue Orchid, 1.8 mu m, 50 x 2 mm) using 0.1 % formic acid in water (pH 2.6) and acetonitrile (60:40; v/v) as mobile phase at a flow rate of 0.5 mL/min. The UV detector was set at 328 nm and 260 nm for analysis of SOF and LED, respectively. To 400 mu L of plasma, 100 mu L of clonazepam as the internal standard (I.S, 7 mu g/mL) was added and the mixture subjected to liquid-liquid extraction using 1000 mu L diethyl ether. The calibration curves were linear with coefficients of variation less than 8% for all analyses. The limit of quantification (LOQ) was 20 and 5 ng/mL for SOF and LED, respectively. The results of inter-day and intra-day precision showed good reproducibility and the total analysis time was 1.2 min. This method successfully applied for determination SOF and LED in four healthy volunteers. (C) 2020 Published by Elsevier B.V.

Reference of 578-57-4, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 578-57-4 is helpful to your research.

Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 150-78-7, Name is 1,4-Dimethoxybenzene. In a document, author is Gong, Ying, introducing its new discovery. Product Details of 150-78-7.

First stable (Z)-configuration of cyanostilbene derivative: An effective turn-on fluorescent sensor for lysine in aqueous media

Due to the rapid E/Z isomerization of cyanostilbene under light or heating, the stable (Z)-configuration of cyanostilbene was hard to be obtained although many (E)-cyanostilbene derivatives had been reported as excellent fluorescence sensor. In this work, the first stable (Z)-configuration of cyanostilbene derivative (Z)-CS bridged by crown-ether chain was designed and synthesized under the irradiation of UV365 and heating. The stable (Z)-configuration was attributed to the short bridging crown-ether chain which restricted the E/Z isomerization of cyanostilbene. (Z)-CS exhibited the weak AIE effect in H2O/DMSO system, but showed the strong turn-on fluorescence enhancement after adding lysine. The detection limit of (Z)-CS for lysine attained 1.34 x 10(-7) M. The selective sensing behavior for lysine was stable in pH = 6-9 and was little interfered by other species. The 1:1 sensing mechanism was proposed by the investigation of Job’s plot, H-1 NMR and MS binding spectra. The sensing ability of (Z)-CS was successfully applied for analyzing lysine in urine samples of human body. (Z)-CS also displayed the good bioimaging performance with enhanced blue-purple fluorescence after detecting lysine. The work not only presented an effective fluorescence sensor for lysine in aqueous media, but also confirmed firstly the excellent application prospect of stable (Z)-configuration of cyanostilbene as fluorescence probe in complicated and living environment.

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