Tag: M.W:100-200

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. 19444-84-9, Name is 3-Hydroxydihydrofuran-2(3H)-one, molecular formula is , belongs to tetrahydrofurans compound. In a document, author is Feng, Dong, Application In Synthesis of 3-Hydroxydihydrofuran-2(3H)-one.

Microwave-assisted rapid fabrication of robust polyetherimide bead foam parts

Polyetherimide (PEI) is an important candidate for fabrication of high-performance polymer foams. Nevertheless, the manufacture of PEI foamed parts with specific three-dimensional geometry shape and lightweight properties remains a big challenge worldwide. Herein, a microwave (MW)-assisted foaming and selective sintering approach was proposed towards rapid fabrication of robust PEI bead foams. During the process, compressed carbon dioxide/tetrahydrofuran was used as physical co-foaming agent, and the surface-coated graphene nanoplatelets (GNPs) was used as MW absorbent. Upon MW irradiation, the GNPs selectively heated and served as solders that effectively facilitated the foaming of expandable PEI (EPEI) beads, and strongly promoted the local polymer melt and entanglement across the surface of EPEI beads. The MW irradiation power and time were considered as the important parameters to achieve fine inter-bead bonding strength between foamed beads. As a model system, we successfully fabricated a 25-mm-thickness foamed part with an apparent density of 0.32 g/cm(3)and achieved excellent inter-bead bonding performance. Specifically, we also utilized the COMSOL Multiphysics simulations to study the MW selective heating mechanism. This MW-assisted fabrication strategy offers a new foaming approach toward high-performance polymer foamed parts for many advanced applications.

If you are hungry for even more, make sure to check my other article about 19444-84-9, Application In Synthesis of 3-Hydroxydihydrofuran-2(3H)-one.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

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, 706-14-9, Name is gamma-Decanolactone, SMILES is O=C1OC(CCCCCC)CC1, belongs to tetrahydrofurans compound. In a document, author is Udomsasporn, Kwanchanok, introduce the new discover, Quality Control of gamma-Decanolactone.

Comparative bindings of lactones, lactide, and cyclic carbonates: experimental insights into the coordination step of polymerization

Comparative bindings of several renowned monomers were investigated experimentally using B(C6F5)(3) as a Lewis acid model for the coordination step in ring-opening polymerization. A complete series of the X-ray crystal structures of the B(C6F5)(3) adducts with the monomers was reported. The X-ray structural studies and spectroscopic data revealed a coordination strength in the order lactones > tetrahydrofuran > cyclic carbonates > lactide.

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 706-14-9 is helpful to your research. Quality Control of gamma-Decanolactone.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

In an article, author is Lin, Yidong, once mentioned the application of 108-30-5, HPLC of Formula: C4H4O3, Name is Dihydrofuran-2,5-dione, molecular formula is C4H4O3, molecular weight is 100.0728, MDL number is MFCD00005525, category is tetrahydrofurans. Now introduce a scientific discovery about this category.

Synthesis and photophysical properties of donor-acceptor flavone-based derivatives with good aggregation-induced emission characteristics

Four novel compounds (1-4) were synthesized using 2-phenyl-4H-1-benzopyran-4-one (flavone) moiety as an acceptor and phenoxazine, phenothiazine, 9,9-dimethyl-9,10-dihydroacridine, diphenylamine as donors. Their photophysical properties were studied with spectroscopic and theoretical methods. The results show that 1 and 2 exhibit good aggregation-induced emission (AIE) properties in tetrahydrofuran (THF)/water mixtures, whose maximum photoluminescence (PL) intensities are 156- and 187-fold higher than those in pure THF solutions, and can reach 256- and 506-fold higher than those in the mixtures at water fractions of 50%, respectively. 3 displays similar PL property except for obvious emission in pure THF solution. However, PL intensity of 4 decreases with an increase in water fraction, and then is enhanced with further increase in water fraction. Moreover, 4 shows high quantum yields both in toluene solution (0.61) and in solid state (0.83). It exhibits a positive sol-vatochromism. In addition, 2 possesses mechanofluorochromic transition from sky blue to yellow after grinding. It can also be applied in live-cell imaging.

If you are interested in 108-30-5, you can contact me at any time and look forward to more communication. HPLC of Formula: C4H4O3.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 108-30-5, Name is Dihydrofuran-2,5-dione, SMILES is O=C(CC1)OC1=O, belongs to tetrahydrofurans compound. In a document, author is Mrowka, Jan, introduce the new discover, Application In Synthesis of Dihydrofuran-2,5-dione.

Poly(methylvinylsiloxane)-Based High Internal Phase Emulsion-Templated Materials (polyHIPEs)-Preparation, Incorporation of Palladium, and Catalytic Properties

Poly(methylvinylsiloxane) (V-3 polymer) obtained by kinetically controlled anionic ring-opening polymerization of 1,3,5-trimethy1-1,3,5-trivinylcyclotrisiloxane was cross-linked with various amounts of 1,3,5,7-tetramethylcyclotetrasiloxane (D-4(H)) in w/o high internal phase emulsions (HIPEs). PolyHIPEs thus prepared differed in the polymer cross-linking degree, which affected their porous morphology and total porosity. The obtained V-3 polymer-based polyHIPEs were applied as matrices for the incorporation of Pd from the Pd(OAc)(2) solution in tetrahydrofuran. This process involved the conversion of Si-H groups remaining in the polymer networks and resulted in the formation of crystalline, metallic Pd in the systems. Mean sizes of the generated Pd crystallites were lower in polyHIPEs of higher than in those of lower polymer cross-linking degrees and porosities (similar to 5 nm vs similar to 8 nm, respectively). The Pd-containing polyHIPEs showed activity in catalytic hydrogenation of the triple carbon-carbon bond in phenylacetylene giving the unsaturated product, styrene with a selectivity of ca. 80%. To the best of our knowledge, this is the first work devoted to polysiloxane-based polyHIPEs with dispersed metallic particles.

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 108-30-5 is helpful to your research. Application In Synthesis of Dihydrofuran-2,5-dione.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Electric Literature of 492-62-6, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 492-62-6, Name is alpha-D-Glucose, SMILES is O[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O, belongs to tetrahydrofurans compound. In a article, author is Aerts, Annelore, introduce new discover of the category.

Pyranine Based Ion-Paired Complex as a Mechanophore in Polyurethanes

A new mechanophore for polyurethane thermoplastic elastomers based on ion-paired complexes is developed. 8-(2-hydroxyethoxy)pyrene-1,3,6-trisulfonate (HEPTS) is incorporated into polyurethanes as an end-capper and aggregates in apolar media. Aggregation of the ionic HEPTS end groups in solution depends on concentration solvent polarity. The addition of dimethylformamide to a tetrahydrofuran solution of the polymer results in the dissociation of the aggregates and a significant shift in fluorescence emission from yellow to blue. The same shift in fluorescence emission is induced by stretching the solid polymer at strains larger than 1 and stresses above 7.5 MPa, with a clear increase above 12.5 MPa. Strain induced dissociation of HEPTS aggregates not attached to the polymer chain leads to fluorescence changes that are much less reproducible.

Electric Literature of 492-62-6, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 492-62-6.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

In an article, author is Dong, Ting, once mentioned the application of 97-99-4, Formula: C5H10O2, Name is (Tetrahydrofuran-2-yl)methanol, molecular formula is C5H10O2, molecular weight is 102.1317, MDL number is MFCD00005372, category is Tetrahydrofurans. Now introduce a scientific discovery about this category.

Surface-modified electrospun polyacrylonitrile nano-membrane for a lithium-ion battery separator based on phase separation mechanism

A separator is an indispensable part of a lithium-ion battery and can seriously affect the battery performance. This study demonstrates the feasibility of a non-solvent-induced phase-separation mechanism for the preparation of lithium-ion battery separators. Based on the mechanism, polyacrylonitrile (PAN) solutions were prepared with different proportions of dimethylformamide (DMF) and tetrahydrofuran (THF) for electrospinning to prepare separators. The surface and interior of the fibers of the electrospun membranes show different morphologies, which make a difference in the performance of batteries based on these separators. The property mixing of DMF and THF can cause microporous structures on the surface and inside of the electrospun fibers, and some pores are internal and external interconnected. This improves the porosity (67.7%), ionic conductivity (1.96 mS.cm(-1)), electrochemical stability (4.2 V), and battery performance compared to commercial Celgard separators.

If you are interested in 97-99-4, you can contact me at any time and look forward to more communication. Formula: C5H10O2.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 5061-21-2, Name is 2-Bromo-4-butanolide, molecular formula is C4H5BrO2, belongs to Tetrahydrofurans compound, is a common compound. In a patnet, author is Yamashita, Katsumi, once mentioned the new application about 5061-21-2, Application In Synthesis of 2-Bromo-4-butanolide.

Facile preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/alpha, omega-dihydroxy-terminated poly(dimethylsiloxane) composite rubber: application to effective removal of fluorinated aromatic compound from aqueous methanol solution by fluoroalkylated silicone composite rubber

Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [R-F-(CH2CHSiOMe)(3))(n)-R-F;n = 2, 3; R-F = CF(CF3)OC3F7: R-F-(VM)(n)-R-F] undergoes the sol-gel reactions in the presence of alpha, omega-dihydroxy-terminated poly(dimethylsiloxane) [HO-(SiMe2O)(n)H:HPDMS] under non-catalytic conditions to provide the crosslinked R-F-(VM)(n)-R-F/HPDMScomposite rubber in quantitative isolated yields. Especially, we can isolate the expected composite rubber through the sol-gel reactions, in which the contents of the R-F-(VM)(n)-R(F)oligomer based on employed oligomer andHPDMSare greater than 0.16%. In contrast, traditional silane coupling agents such as tetraethoxysilane, methyltrimethoxysilane and triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane were unable to afford the expected composite rubber through the sol-gel reactions withHPDMSunder similar conditions. The fluoroalkylated silicone composite rubber thus obtained gave no swelling behavior toward water, dimethyl sulfoxide and methanol; however, the composite rubber was found to display the higher swelling characteristic for toluene, hexane and tetrahydrofuran, especially for fluorinated aliphatic solvents. Interestingly, it was demonstrated that the fluoroalkylated silicone composite rubber swollen with hexane can adsorb a variety of aromatic compounds in aqueous methanol solutions. More interestingly, we found that the fluoroalkylated silicone composite rubber can exhibit an excellent adsorption ability toward the fluorinated aromatic compounds such as 2 ‘, 3 ‘, 4 ‘, 5 ‘, 6 ‘-pentafluoroacetophenone, compared to that of the corresponding non-fluorinated one. Graphic abstract

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 5061-21-2. The above is the message from the blog manager. Application In Synthesis of 2-Bromo-4-butanolide.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 492-62-6, Name is alpha-D-Glucose, formurla is C6H12O6. In a document, author is Kumar, Pawan, introducing its new discovery. Name: alpha-D-Glucose.

Simple Iron(III) Complex Based Highly Sensitive Fluorescent Off-On Sensor for the Detection of Trace Amount of Water in Organic Solvents and Edible Oilseeds

Moisture detection in organic solvents and materials by using chemical sensors represent the latest research area in analytical chemistry. In this paper, we report a new fluorescent chemical sensor for the sensitive detection of trace amount of water in Tetrahydrofuran(THF), acetone and acetonitrile. The new probeL.Fe(III) complex consists of the fluorescent reporter dansyl dye attached with Fe(III) ion. LigandL, and probeL.Fe(III) exhibits solvatochromism by intramolecular charge transfer (ICT) due to the donor-acceptor properties of the dansyl compound. ProbeL.Fe(III) is a non-fluorescent compound and it becomes highly fluorescent in the presence of trace amount of water in THF, acetone and acetonitrile. The probe shows highly sensitive towards the water in THF with a limit of detection (LOD) as low as 0.0003 weight(wt) %.H-1-NMR, ESI-MS and fluorescence lifetime studies established that displacement of metal from the probe is responsible for fluorescent enhancement. Further, for the first time probeL.Fe(III) has been explored as a fluorescence indicator for the qualitative and quantitative detection of trace-level of water content in various edible oilseeds such as groundnut, mustard, sunflower, sesame and almond.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 492-62-6 help many people in the next few years. Name: alpha-D-Glucose.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Application of 7331-52-4, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, SMILES is O=C1OC[C@@H](O)C1, belongs to Tetrahydrofurans compound. In a article, author is Delnick, Frank M., introduce new discover of the category.

Investigation of Complex Intermediates in Solvent-Mediated Synthesis of Thiophosphate Solid-State Electrolytes

Lithium thiophosphates represent a promising class of solid Li+ conductors for all-solid-state batteries. Scalable solvent-mediated synthesis routes for several Li-P-S ternary compounds have been reported, but little is known regarding the reaction mechanism of such pathways. This work demonstrates that solvent-mediated synthesis of lithium thiophosphate solid electrolytes from mixtures of Li2S and P2S5 proceeds through a highly soluble P2S62- intermediate. This intermediate exhibits virtually the same Raman spectra in several solvents including acetonitrile, methyl acetate, ethyl acetate, ethyl propionate, dimethoxyethane, tetraethylene glycol dimethyl ether, and tetrahydrofuran. Based on this universal intermediate, a general reaction mechanism is proposed for the solvent-mediated synthesis of several lithium thiophosphates including (LiPS3)(n), Li2P2S6, Li7P3S11, and Li3PS4.

Application of 7331-52-4, 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 7331-52-4 is helpful to your research.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 79-50-5, Name is 3-Hydroxy-4,4-dimethyldihydrofuran-2(3H)-one, SMILES is O=C1OCC(C)(C)C1O, belongs to Tetrahydrofurans compound. In a document, author is Chaffin, Vinicius O., introduce the new discover, Formula: C6H10O3.

Composition dependence on the spectral behavior of magnesium aluminum chloride complex electrolytes

A composition-dependent study is presented for 1:1 and 2:1 MgCl2:AlO3 (MACC)-tetrahydrofuran (THF) electrolytes and the findings very well support electrochemical data reported in the literature. Quantitative Raman analyses in the region characteristic of the nu(cc) and nu(co) modes of THF at around 915 cm(-1) were performed and correlated with the low wavenumber region. The nu(Al-O) and nu(Mg-O) vibrations are reported for the first time and are in excellent agreement with the solvates identified in the IR and Raman spectra. Although AlCl3.xTHF (x = 1-2) are present in these solutions, the systems are governed by the [AlCl4](-) anion. In light of our spectroscopic results, [Mg(THF)(6)](2+) is the major species and responsible for the lower electrochemical performance of the 1:1 electrolyte, whereas [MgCl2(THF)(4)] and [(mu-Cl)(3)Mg-2(THF)(6)](+) are the complexes related with the higher electrochemical activity of the 2:1 proportion. (C) 2020 Elsevier B.V. All rights reserved.

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 79-50-5 is helpful to your research. Formula: C6H10O3.

Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem