Tag: M.W:100-200

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, COA of Formula: C6H12O6, 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 document, author is Wang, Huazhao, introduce the new discover.

Gamma Radiation-Induced Unsaturated P(VDF-CTFE) Membranes with Improved Mechanical Properties

Poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDF-CTFE)) membranes were prepared by drop-casting with tetrahydrofuran (THF), and were then radiated by a low dose of gamma radiation without any other reagents. The apparent colour of the freshly prepared film was a semi-transparent white, which gradually darkened and finally turned black after 10.2 kGy gamma radiation. Meanwhile, the yield and breaking strength of the membrane both improved. X-Ray diffraction (XRD) spectra showed that the structure of the microcrystal of the irradiated P(VDF-CTFE)-THF membrane was not changed. FT-IR analysis showed that the structure of the newly formed double bonds was dominated by -CF2-CF=CH-CF2-, which was formed by both dehydrofluorination and dehydrochlorination. This structure was further confirmed by H-1 NMR spectra. The intermediates, such a radical-containing double bonds (-(CF=CH)(n)-C center dot F-) formed in this process were traced by electron paramagnetic resonance (EPR) spectroscopy. The thermal and mechanical properties were studied by gel permeation chromatography (GPC), thermogravimetric analysis (TGA), stress-strain and dynamic mechanical analysis (DMA), and all the changes of microstructure and optimization of apparent properties were not found in the corresponding membrane prepared by a solution-cast method with ethyl acetate (EtOAc). Therefore, this paper briefly analyses the probable mechanism of using low dose of gamma radiation to improve the mechanical properties of the P(VDF-CTFE) film prepared with THF.

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 492-62-6. COA of Formula: C6H12O6.

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

Chemistry is an experimental science, SDS of cas: 5061-21-2, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 5061-21-2, Name is 2-Bromo-4-butanolide, molecular formula is C4H5BrO2, belongs to Tetrahydrofurans compound. In a document, author is Huang, Yuzhang.

Cu(I)-Catalyzed Heterogeneous Multicomponent Polymerizations of Alkynes, Sulfonyl Azides, and NH4Cl

Nitrogen-containing polymers are a group of fascinating materials, which are usually prepared from nitrogencontaining organic monomers produced from NH3 gas or aqueous solution of ammonia. The direct utilization of safe, clean, convenient, and inexpensive inorganic NH4Cl salt as a nitrogen source for the construction of functional polymers is highly desired but challenging. Multicomponent polymerizations, with their strong designability, structural diversity, high efficiency, simple procedure, and environmental benefit, have been proven to be powerful tools to efficiently convert simple monomers to complex polymer materials. In this work, Cu(I)-catalyzed multicomponent polymerizations of alkynes, sulfonyl azides, and NH4Cl are developed, utilizing simple inorganic NH4Cl salt to serve as a monomer for the preparation of functional poly(sulfonyl amidine)s. The heterogeneous polymerization goes smoothly at room temperature in CH2Cl2/tetrahydrofuran, which is also applicable to a range of different monomer structures, affording seven poly(sulfonyl amidine)s with high yields (up to 96%) and high molecular weights (up to 47,100 g/mol). Unique functionalities such as photophysical properties and metal ion detection can be introduced to the poly(sulfonyl amidine)s either from monomer structures or the in situ generated product structures, rendering them as selective and sensitive fluorescence sensors for Ru3+. This multicomponent polymerization showed high synthetic efficiency with environmental and economic benefit, which has opened up a feasible synthetic method of using inorganic NH4Cl salt instead of organic amines, isocyanates, isocyanides, or nitriles to construct nitrogen-containing polymers, demonstrating a promising synthetic approach for the synthesis of advanced functional polymer materials.

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 5061-21-2, in my other articles. SDS of cas: 5061-21-2.

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

Application of 97-99-4, 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. 97-99-4, Name is (Tetrahydrofuran-2-yl)methanol, SMILES is OCC1OCCC1, belongs to Tetrahydrofurans compound. In a article, author is Yuan, Xinqiang, introduce new discover of the category.

IDTI Dyes for Fluoride Anion Chemosensors

Fluoride anions play a key role in human health and chemical engineering, such as in organic synthesis and biological processes. The development of high-sensitivity naked-eye detection sensors for fluoride anions in organic solutions is crucial and challenging. In this study, (3Z,3 ‘ Z)-3,3 ‘-[4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno(1,2-b:5,6-b ‘)dithiophene]-2,7-diylbis(methan-1-yl-1-ylidene) bis(6-bromo-indolin-2-one) (IDTI) was designed and used as a fluoride chemosensor for the first time. IDTI is a highly sensitive fluoride sensor with a detection limit of as low as 1 x 10(-7) M. In addition, upon the reaction of IDTI with fluoride anions in a tetrahydrofuran (THF) solution, color changes from red to yellow under ambient light and from purple to green under UV light were detectable by the naked eye. These studies indicate that IDTI is a promising fluoride chemosensor.

Application of 97-99-4, 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 97-99-4 is helpful to your research.

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

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. 79-50-5, Name is 3-Hydroxy-4,4-dimethyldihydrofuran-2(3H)-one, molecular formula is , belongs to Tetrahydrofurans compound. In a document, author is Nis, Berna, COA of Formula: C6H10O3.

A comprehensive experimental study on the production of key platform chemicals from raw biomass

In recent years, the utilization of biomass resources in the production of industrial chemicals and fuels become more preferable when considering low cost, renewability and environmental concerns. In this study, 5-hydroxymethylfurfural and levulinic acid obtained from catalytic one-pot reaction of different feedstocks (microcrystalline cellulose, corn straw, sorghum and waste fluff) under the specified conditions (temperature, time, solvent ratio, catalyst loading) using different cosolvents (methanol, hexane, tetrahydrofuran (THF), acetone) in reaction medium. Over the Amberlyst-15 catalyst, significant increase in levulinic acid concentration was achieved using acetone as cosolvent thus 94.34 +/- 5.25 mg levulinic acid was obtained from 1 g sorghum at 180 degrees C for 30 min. The use of polar aprotic solvents such as THF and acetone promoted further hydrolysis of raw biomass materials in reaction medium.

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 79-50-5, in my other articles. COA of Formula: C6H10O3.

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

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 706-14-9, Name is gamma-Decanolactone, molecular formula is C10H18O2, belongs to tetrahydrofurans compound. In a document, author is Riahi, Farhad, introduce the new discover, Safety of gamma-Decanolactone.

Kopetdaghinanes, pro-apoptotic hemiacetialic cyclomyrsinanes from Euphorbia kopetdaghi

Euphorbia kopetdaghi grows wild in the Northeast parts of Iran. Phytochemical study of its aerial parts led to the isolation of two undescribed cyclomyrsinol macrocyclic diterpenes with a new tetrahydrofuran oxidation pattern containing a hemiacetal group named: kopetdaghinane A and B. The structure of the isolated compounds was elucidated by extensive spectroscopic methods. Cytotoxic activity of kopetdaghinane A was evaluated using standard MTT assay against MCF-7 breast cancer and OVCAR-3 ovary cells. HUVEC cells were used as a normal cell line for calculation of the selectivity index. The MTT showed cyclomyrsinol diterpene has a significant cytotoxic effect with good selectivity indexes against both cell lines but with more selectivity against MCF-7 cells. Apoptosis induction by cyclomyrsinol treatment was confirmed by annexin V-FITC/PI staining, and caspase-6 activation. Western blot analysis showed that the expression of Bcl-2 was noticeably decreased in response to kopetdaghinane A treatment, while the expression of Bax protein was increased. Moreover, the apoptotic effect of cyclomyrsinol was shown to be related to ROS production, and loss of mitochondrial membrane potential (Delta Psi m). Taken together, these results showed that kopetdaghinane A inhibits the growth of MCF-7 breast cancer cells through the activation of the mitochondrial apoptotic pathway and may be considered as an investigational compound in breast cancer preclinical study.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 706-14-9. Safety of gamma-Decanolactone.

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

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Recommanded Product: Undecanoic gamma-Lactone, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 104-67-6, Name is Undecanoic gamma-Lactone, molecular formula is C11H20O2. In an article, author is Ibnaouf, K. H.,once mentioned of 104-67-6.

Photodynamic properties of poly [2-methoxy-5-(3 ‘,7 ‘-dimethyloctyloxy)-1, 4-phenylenevinylene] under pulsed laser excitation

In this work, the photophysical properties of a conjugated polymer poly [2-methoxy-5-(3′,7′-dimethyloctyloxy) (MDMO-PPV) under a wide range of solvents and concentrations were studied. MDMO-PPV in tetrahydrofuran (THF) showed two absorption bands at 333 and 490 nm. Regardless of the optical density, the absorption spectrum did not change with increasing or decreasing the concentration. Consequently, the studies showed that the aggregations were not formed in the ground state for MDMO-PPV for all solvents and concentrations used. On the other hand, the fluorescence spectrum of MDMO-PPV in THF showed two distinctive bands around 555 and 595 nm. By increasing concentration, the profile of the fluorescence spectrum remained constant. Most of PPV derivatives’ spectra are affected by the concentrations and temperatures in the ground or excited states. Nevertheless, the ratio of the intensity bands (555 nm: 595 nm) MDMO-PPV was not significantly affected by the concentration or temperature in both cases. According to our knowledge, the band at 595 nm is not attributed to the excimeric state. Therefore, fluorescence bands 555 and 595 nm are composed of two vibronic transitions and assigned to 0-0, 0-1 respectively. Under pulsed laser excitation of Nd: YAG laser (lambda(ex) = 355 nm), MDMO-PPV produced an amplified spontaneous emission (ASE) peaks at 597 nm. The ASE peaks may be attributed to 0-1transition.

If you¡¯re interested in learning more about 104-67-6. The above is the message from the blog manager. Recommanded Product: Undecanoic gamma-Lactone.

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

Chemistry, like all the natural sciences, Recommanded Product: 3-Hydroxy-4,4-dimethyldihydrofuran-2(3H)-one, begins with the direct observation of nature¡ª in this case, of matter.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 Hanthanong, Sujitra, introduce the new discover.

Two new rearranged clerodane diterpenes from Thai Tinospora baenzigeri

A new rearranged clerodane-type diterpene (1), tinobaenzigeride, and a new rearranged clerodane glucoside (2) were isolated from the stems ofTinospora baenzigeri, along with four known compounds (3-6). Their structures were elucidated by spectroscopic data analysis. In addition, the structure and configuration of1was confirmed by single-crystal X-ray diffraction analysis. Compound 1 are a rare example of rearranged clerodanes, since it contains a fully oxygenated tetrahydrofuran moiety. The isolated compounds were evaluated for their cytotoxicity against Hep-G2 and MCF-7 cancer cells, none of them did show any significant activity at 25 mu M. [GRAPHICS] .

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 79-50-5. Recommanded Product: 3-Hydroxy-4,4-dimethyldihydrofuran-2(3H)-one.

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. 97-99-4, Name is (Tetrahydrofuran-2-yl)methanol, SMILES is OCC1OCCC1, belongs to Tetrahydrofurans compound. In a document, author is Mok, Jorge Wu, introduce the new discover, Category: Tetrahydrofurans.

Evaluation of the engineered polysaccharide alpha-1,3 glucan in a thermoplastic polyurethane model system

Enzymatic polymerization is under development as novel scalable process technology to convert sucrose to engineered polysaccharides. Similar to established monomer-based polymerization processes, this approach allows for the synthesis of glucose-based polymers with controlled polymer linkage, structure, and material morphology. Using enzymatic polymerization, alpha-1,3-polyglucose (glucan) can now be produced from sugar on scales required for industrial applications. This alpha-1,3 glucan material, with accessible primary and secondary hydroxyl groups within the overall defined particle morphology, is especially of interest as a partially reactive component in polyurethane chemistry. This study explores the impact of alpha-1,3-glucan as additive in a thermoplastic polyurethane model system and the improvement in mechanical properties of these composites. Glucan was effectively first mixed with a polyether polyol diol, forming a stable dispersion with narrow particle size distribution, followed by reaction with diisocyanate and chain extender to form the polyurethane matrix. The analysis of the generated polyurethane matrix indicates that the hydroxyl groups of the dispersed glucan particles directly react with isocyanate. Tetrahydrofuran solubility of the formed polyurethane compound decreased with the addition of glucan, providing evidence of covalent bonding of glucan leading to cross-linking of the polyurethane matrix. Thermal analysis of this model system suggests that the glucan additive induces hard segment crystallization, resulting in increased hardness and tensile modulus compared with the reference. Based on the observed property enhancements, engineered polysaccharides provide a sustainable performance additive for polyurethane materials.

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 97-99-4 is helpful to your research. Category: Tetrahydrofurans.

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

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. Computed Properties of C4H4O3, 108-30-5, Name is Dihydrofuran-2,5-dione, SMILES is O=C(CC1)OC1=O, in an article , author is Kang, Houng, once mentioned of 108-30-5.

Nickel-Catalyzed Vinylidene Insertions into O-H Bonds

A (pybox)Ni catalyst (where pybox = pyridine-bis(oxazoline)) promotes the reductive cyclization of beta-hydroxy 1,1-dichloroalkenes to form 2,3-dihydrofurans. The substrates for this reaction are conveniently prepared by an aldol addition, followed by one-carbon homologation. Chiral substrates are accessible in highly enantioenriched form, allowing for the synthesis of stereochemically complex 2,3,4-trisubstituted products. Mechanistic studies support a vinylidene O-H insertion rather than a C-O cross-coupling pathway.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 108-30-5, you can contact me at any time and look forward to more communication. Computed Properties of C4H4O3.

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

Related Products of 108-30-5, 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. 108-30-5, Name is Dihydrofuran-2,5-dione, SMILES is O=C(CC1)OC1=O, belongs to tetrahydrofurans compound. In a article, author is Kim, Min Cheol, introduce new discover of the category.

Complementary Genomic, Bioinformatics, and Chemical Approaches Facilitate the Absolute Structure Assignment of lonostatin, a Linear Polyketide from a Rare Marine-Derived Actinomycete

A new linear type-1 polyketide, ionostatin (1), has been fully defined using a combined genomic and bioinformatics approach coupled with confirmatory chemical analyses. The 41 carbon-containing polyether is the product of the 101 kbp ion biosynthetic cluster containing seven modular type-1 polyketide synthases. Ionostatin is composed of 15 chiral centers that were proposed using the stereospecificities installed by the different classes of ketoreductases and enoylreductases and confirmed by rigorous NMR analyses. Incorporated into the structure are two tetrahydrofuran rings that appear to be the product of stereospecific epoxidation, followed by stereospecific ring opening and cyclization. These transformations are proposed to be catalyzed by conserved enzymes analogous to those found in other bacterial-derived polyether biosynthetic clusters. Ionostatin shows moderate cancer cell cytotoxicity against U87 glioblastoma and SKOV3 ovarian carcinoma at 7.4 mu g/mL.

Related Products of 108-30-5, Because enzymes can increase reaction rates by enormous factors and tend to be very specific, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 108-30-5.

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