Category: 89-00-9

Application of 89-00-9, 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. 89-00-9, Name is Pyridine-2,3-dicarboxylic acid, SMILES is O=C(C1=NC=CC=C1C(O)=O)O, belongs to pyridine-derivatives compound. In a article, author is El Hamdaoui, Lahcen, introduce new discover of the category.

Synthesis, Characterization and Pyrolysis Kinetics of Chitosan-N-Phenylacetamide in an Ionic Liquid 1-Butyl-3-Methylimidazolium Chloride

This study intends to synthesis novel compound phenolic chitosan-based via reaction of chitosan with 2-Chloro-N-phenylacetamide in 1-butyl-3-methylimidazolium chloride ionic liquid in the presence of pyridine at 80 degrees C for 4 h. The alterations in the chemical structure and morphology of the chitosan-N-phenylacetamide biopolymer were verified using IR spectroscopy, XRD, and SEM analyses. Chitosan and Chitosan-N-phenyacetamide were subjected to thermo-gravimetric analysis under an inert atmosphere in the temperature range of room temperature – 600 degrees C at a heating rate of 20 degrees C.min(-1). The kinetic parameters were determined by the Coats-Redfern method. The corresponding kinetic parameters of the main degradation stages were also determined. The energy required for the degradation of pure chitosan was lower than that of chitosan-N-phenylacetamide in the first region of thermal degradation where the main pyrolysis reaction took place, and the largest weight loss occurred. Energy values in this region are running from 40.25 to 151.07 kJ/mol and 58.45 to 210.99 kJ/mol, respectively. The most probable reaction functions have thus been determined for these two stages by Coats-Redfern and Criado method, leading to greatly improved calculation performance over the entire conversion range. The pyrolysis reaction models of both pure chitosan and chitosan-N-phenylacetamide are described by the reaction, second-order F2.

Application of 89-00-9, 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 89-00-9 is helpful to your research.

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 89-00-9, Name is Pyridine-2,3-dicarboxylic acid, molecular formula is C7H5NO4. In an article, author is Chouliaras, Thanasis,once mentioned of 89-00-9, Name: Pyridine-2,3-dicarboxylic acid.

Synthesis of Imidazolium based PILs and Investigation of Their Blend Membranes for Gas Separation

Polymeric (ionic liquid) (PIL) copolymers bearing cationic imidazolium pendants and polar acrylic acid groups (P(VBCImY-co-AA(x))), which both favor the interaction with CO2 molecules, have been synthesized and blended with film forming, high glass transition temperature aromatic polyether-based pyridinium PILs (PILPyr). The blend membranes based on the above combination have been prepared and characterized in respect to their thermal and morphological behavior as well as to their gas separation properties. The used copolymers and blends showed a wide range of glass transition temperatures from 32 to 286 degrees C, while blends exhibited two phase morphology despite the presence of polar groups in the blend components that could participate in specific interactions. Finally, the membranes were studied in terms of their gas separation behavior. It revealed that blend composition, counter anion type and acrylic acid molar percentage affect the gas separation properties. In particular, PILPyr-TFSI/P(VBCImTFSI-co-AA(20)) blend with 80/20 composition shows CO2 permeability of 7.00 Barrer and quite high selectivity of 103 for the CO2/CH4 gas pair. Even higher CO2/CH4. selectivity of 154 was achieved for PILPyr-BF4/P(VBCImBF(4)-co-AA(10)) blend with composition 70/30.

If you¡¯re interested in learning more about 89-00-9. The above is the message from the blog manager. Name: Pyridine-2,3-dicarboxylic acid.

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , COA of Formula: C7H5NO4, 89-00-9, Name is Pyridine-2,3-dicarboxylic acid, molecular formula is C7H5NO4, belongs to pyridine-derivatives compound. In a document, author is Serykh, Valery Yu, introduce the new discover.

New Approach to the Synthesis of 2-Sulfonylaminosubstituted Imidazo[1,2-a]pyridines via the Cascade Reaction of N-(1-aryl-2,2,2-trichloroethyl) sulfonamides with 2-Aminopyridines

2-Aminopyridines react with N-(1-aryl-2,2,2-trichloroethyl)arenesulfonamides in the presence of K2CO3 and DABCO to afford previously unknown 2-sulfonylaminosubstituted imidazo[1,2-a]pyridines. The annulated heterocyclic derivatives are likely formed via dichloroaziridine and alpha-chloro imidoylchloride intermediates.

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 89-00-9. COA of Formula: C7H5NO4.

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 89-00-9, Name is Pyridine-2,3-dicarboxylic acid, SMILES is O=C(C1=NC=CC=C1C(O)=O)O, in an article , author is Rivoira, Lorena P., once mentioned of 89-00-9, Category: pyridine-derivatives.

Catalytic oxidation of sulfur compounds over Ce-SBA-15 and Ce-Zr-SBA-15

The catalytic oxidation of different sulfur compounds, commonly present in liquid fuel, was studied over a series of ceria and ceria-zirconium based oxidation mesoporous catalysts. SBA-15 was synthesized using sol-gel method and Ce and Ce-Zr were added by two different procedures: i) directly during the synthesis and ii) via post synthesis method. The catalysts were characterized by XRD, N-2 adsorption isotherms, XPS, DRUV-Vis, TEM, SEM and Py-FTIR. Low angle XRD, N-2 isotherms and TEM confirmed that the structure was not changed after metal incorporation. Wide angle XRD, UV-vis-DRS, XPS and TEM determined that the catalysts prepared by direct synthesis presented higher dispersion of Ce oxides, smaller particle size and isolated Zr4+ species. FTIR of adsorbed/desorbed pyridine indicated that zirconium as promoter increases the Lewis acidity of the catalysts, especially during direct synthesis. Ce-Zr-SBA-15 catalyst prepared by direct synthesis was very active in the oxidation of dibenzothiophene, 4,6-dimethyl dibenzothiophene and benzothiophene using hydrogen peroxide (H2O2) as oxidant agent and acetonitrile as polar solvent. The effect of acidity in the catalyst, hydrogen peroxide concentration and temperature was studied. The deactivation test demonstrated that the catalyst is stable and adequate for the industrial process.

Interested yet? Read on for other articles about 89-00-9, you can contact me at any time and look forward to more communication. Category: pyridine-derivatives.

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 89-00-9, Name is Pyridine-2,3-dicarboxylic acid, SMILES is O=C(C1=NC=CC=C1C(O)=O)O, in an article , author is In-noi, Orrasa, once mentioned of 89-00-9, Category: pyridine-derivatives.

Insight into Fructose Dehydration over Lewis Acid alpha-Cu2P2O7 Catalyst

Key information on direct conversion of fructose into 5-hydroxymethylfurfural (5-HMF) over Lewis acid sites was investigated by combining experimental and computational studies. A series of alpha-copper pyrophosphate (alpha-Cu2P2O7) was synthesized and used as a heterogeneous catalyst model for bifunctional acid-catalyzed fructose dehydration under hot compressed water at mild temperature. Structural and phase transformations of the catalyst samples were systematically characterized by in situ X-ray absorption spectroscopy (in situ XAS), X-ray powder diffraction (XRD) and Transmission electron microscopy (TEM). The type of acidic site was verified by in situ pyridine-adsorbed Fourier-transform infrared spectroscopy (in situ Py-FTIR). Results revealed that calcination temperature greatly impacted microstructure, acid strength, and activity of the alpha-Cu2P2O7 catalysts. Lewis acid sites showed the main activity on alpha-Cu2P2O7 catalyst surfaces. Catalytic performance was strongly dependent on reaction temperature and reaction time. Under optimal reaction condition, the calcined sample at 900 degrees C exhibited the best catalytic performance with 5-HMF production yield of 42.0%. Results from density functional theory (DFT) revealed that fructose dehydration over alpha-Cu2P2O7 catalyst was enhanced by increasing reaction thermodynamics via Lewis acid sites.

Interested yet? Read on for other articles about 89-00-9, you can contact me at any time and look forward to more communication. Category: pyridine-derivatives.

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 89-00-9, Name is Pyridine-2,3-dicarboxylic acid, molecular formula is C7H5NO4, belongs to pyridine-derivatives compound, is a common compound. In a patnet, author is Anna, Kuzminova, once mentioned the new application about 89-00-9, Quality Control of Pyridine-2,3-dicarboxylic acid.

Nanostructured metal coatings for surface-enhanced Raman spectroscopy (SERS) prepared by means of low-pressure plasma

Development of surface-enhanced Raman scattering (SERS)-based sensing platforms has recently received increasing attention, which relates mainly to the improvement of the Raman detection sensitivity. The commonly studied SERS platforms are based on Ag or Au nanostructures that both exhibit localized surface plasmon resonance (LSPR) responsible for SERS enhancement in the visible spectral region. In this study we demonstrate that sequential deposition of Ag and Au significantly enhances SERS signal as compared to single metal nanostructured coatings, which is connected with the possibility to increase LSPR intensity without alteration of its position in the case of Au/Ag coatings.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 89-00-9. The above is the message from the blog manager. Quality Control of Pyridine-2,3-dicarboxylic acid.

Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem

Application of 89-00-9, Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 89-00-9, name is Pyridine-2,3-dicarboxylic acid. A new synthetic method of this compound is introduced below.

Synthesis of compound [Ag4(apyz)3 (pyd)2¡¤3H2O]n (2) The synthesis of 2 was similar to that of compound 1, but aminopyrazine (apyz) was added to solution. And pale yellow crystals of 2 were obtained in 70% yield based on Ag. Elemental analysis: Anal. Calc. for Ag4C26H26N11O11: C 28.39, H 2.38, N 3.68%. Found: C 28.41, H 2.30, N 13.98%. Selected IR peaks (cm-1): 3339 (s), 3154 (s), 2721 (w), 1665 (m), 1575 (s), 1530 (s), 1428 (s), 1378 (s), 1320 (m), 1205 (m), 1180 (w), 1148 (w), 1090 (w), 1066 (w), 1002 (m), 868 (w), 823 (m), 772 (m), 708 (m), 645 (w), 531 (w), 435(m).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,89-00-9, its application will become more common.

Reference:
Article; Wang, Dan-Feng; Wang, Zhan-Hui; Zhang, Ting; Huang, Rong-Bin; Zheng, Lan-Sun; Journal of Molecular Structure; vol. 1068; 1; (2014); p. 210 – 215;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 89-00-9, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 89-00-9, name is Pyridine-2,3-dicarboxylic acid, molecular formula is C7H5NO4, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

To the solution of pyridine-2,3-dicarboxylic acid (50 g, 300 mmol) in MeOH (300 mL) was added SOCl2 (44 mL, 600 mmol), and the mixture was refluxed overnight. Volatiles were removed under vacuum, sat. Na2CO3 was added, and the mixture was extracted with EtOAc. The organic phase was washed with brine, dried (Na2SO4) and evaporated under vacuum to give dimethyl pyridine-2,3-dicarboxylate as a colorless oil. Yield 32 g, 54percent.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 89-00-9, Pyridine-2,3-dicarboxylic acid.

Reference:
Patent; MICURX PHARMACEUTICALS, INC.; WO2008/108988; (2008); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 89-00-9, name is Pyridine-2,3-dicarboxylic acid. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C7H5NO4

To a solution of pyridine-2,3-dicarboxylic acid (50.0 g, 0.299 mol) in methanol (500 ml) was added con. sulfuric acid (20 ml). After heated to reflux for 24 hours, the mixture wasbasified with saturate sodium carbonate solution until pH=8 and then extracted with ethyl acetate. The combined extracts were washed with brine, dried over magnesium sulphate, filtered and evaporated to give D78 (45.7 g) as a white solid. 1H NMR (ODd3) 6 ppm = 3.95 (s, 3H), 4.01 (s, 3H), 7.51 (m, 1H), 8.18 (dd, J = 6.4, 1.6Hz, 1 H), 8.77 (dd, J = 6.8, 2.0 Hz, 1 H).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it, 89-00-9, Pyridine-2,3-dicarboxylic acid.

Reference:
Patent; ROTTAPHARM SPA; STASI, Luigi Piero; ROVATI, Lucio Claudio; ARTUSI, Roberto; COLACE, Fabrizio; MANDELLI, Stefano; PERUGINI, Lorenzo; WO2013/92893; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem