Category: 1945-84-2

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 1945-84-2, Name is 2-Ethynylpyridine, molecular formula is C7H5N, belongs to pyridine-derivatives compound. In a document, author is Zhang, Zhenshu, introduce the new discover, SDS of cas: 1945-84-2.

Facile adjusting the concentration of siliceous seed to obtain different HZSM-5 zeolite catalysts for effective catalytic depolymerization reaction of lignin

To improve lignin depolymerization reaction performance of HZSM-5 zeolite catalyst, we reported the effective catalytic depolymerization of rice husk lignin (RHL) to lignin phenolic monomer (LP) products over the different Si/Al mole ratios of HZSM-5 zeolite catalyst. Firstly, five samples comprising different Si/Al mole ratio of HZSM-5 zeolite catalyst were prepared by the physical method. The X-ray powder diffraction (XRD), scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET), pyridine adsorption Fourier transform infrared spectroscopy (FT-IR), and temperature-programmed desorption of ammonia (NH3-TPD) were used to characterize various catalysts. Secondly, gas chromatography-mass spectrometry (GC-MS), 2D heteronuclear single quantum coherence (2D-HSQC), and gel permeation chromatography (GPC) were used to characterize various catalytic depolymerization products. The effect of different Si/Al molar ratios on the lignin conversion to LP products and the structural changes of residual lignin were analyzed. Finally, according to the results of LP products, we discovered that after the use of different Si/Al molar ratios of HZSM-5 zeolite catalysts, the content of acid in the different catalysts which increased with decreasing the Si/Al mole ratios. Among them, the A4P PM products (A4P: having a saturated or unsaturated aliphatic side chain in C4 position) increased from 0.58% (SA560, Si/Al: 560) to 1.83% (SA70, Si/Al: 70), the C6P PM products (C6P: having no side chain in C4 position of G, S, and H structure) increased from 1.53% (SA560, Si/Al: 560) to 3.41% (SA70, Si/Al: 70). Finally, the highest 6.05% PM products yield appeared in the SA70 (Si/Al: 70) catalytic system. It is worth noting that PM products produced by this HZSM-5 zeolite catalyst SA70 have great potential to be a promising renewable alternative to fossil resources.

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 1945-84-2. SDS of cas: 1945-84-2.

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

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1945-84-2, Name is 2-Ethynylpyridine, molecular formula is C7H5N. In an article, author is Zou, Bingfang,once mentioned of 1945-84-2, Category: pyridine-derivatives.

Magnetic Assembly Route to Construct Reproducible and Recyclable SERS Substrate

The fabrication of a uniform array film through assembly of colloidal building blocks is of practical interest for the integrated individual and collective functions. Here, a magnetic assembly route was put forward to organize monodisperse noble metal microspheres into a uniform array film for surface-enhanced Raman scattering (SERS) application, which demonstrated the integrated signal sensitivity of single noble metal microspheres and reproducibility of their assembled uniform array film. For this purpose, monodisperse multifunctional Fe3O4@SiO2@TiO2@Ag (FOSTA) colloidal microspheres as building blocks were successfully synthesized through a homemade ultrasonic-assisted reaction system. When used in SERS test, these multifunctional microspheres could firstly bind the analyte (R6G) from solution and then assembled into a uniform film under an external magnetic field, which exhibited high SERS detection sensitivity with good reproducibility. In addition, due to the TiO2 interlayer in FOSTA colloidal microspheres, the building blocks could be recycled and self cleaned through photocatalytic degradation of the adsorbed analyte for recycling SERS application.

Interested yet? Keep reading other articles of 1945-84-2, you can contact me at any time and look forward to more communication. Category: pyridine-derivatives.

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

Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 1945-84-2, Name is 2-Ethynylpyridine, SMILES is C1=C(N=CC=C1)C#C, in an article , author is Setifi, Zouaoui, once mentioned of 1945-84-2, Category: pyridine-derivatives.

Synthesis, Structure and Hirshfeld Surface Analysis of a New Iron Complex [Fe(N4Py)(tcnspr)] (tcnspr)

We report the synthesis, crystal structure and Hirshfeld surface analysis of Fe(II) complex based on a pentadentate N4Py (N4Py = N,N-bis(2-pyridylmethyl)-N-(bis-2-pyridylmethyl)amine) and polynitrile tcnspr (1,1,3,3-tetracyano-2-thiopropylpropenide) ligands, [Fe(N4Py)(tcnspr)](tcnspr) 1. The X-ray result, indicates that 1 is low-spin Fe(II) complex. The tcnspr coordinated molecule in the cation exhibits disorder over two sets of atomic sites having occupancies of 0.681 (6) and 0.319 (6) and the uncoordinated tcnspr anion is also disordered over two sets of atomic sites with occupancies 0.574 (7) and 0.426 (7). The crystal packing of 1 is established mainly by weak intermolecular C-H horizontal ellipsis N/S/C hydrogen bonds and stacking interactions involving the pyridine ring and/or the C-C equivalent to N moieties. Hirshfeld surface analysis employing three-dimensional molecular surface contours and contacts enrichment ratio calculations were used to understand the intermolecular interactions present in the structure. Graphic

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 1945-84-2, you can contact me at any time and look forward to more communication. Category: pyridine-derivatives.

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

Adding a certain compound to certain chemical reactions, such as: 1945-84-2, 2-Ethynylpyridine, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, Recommanded Product: 2-Ethynylpyridine, blongs to pyridine-derivatives compound. Recommanded Product: 2-Ethynylpyridine

mixture of methyl 4-(difluoromethoxy)-3-iodobenzoate (2 g, 6.1 mmol) from step 1 , 2- ethynylpyridine (0.94 ml_, 9.2 mmol), dichlorobistriphenylphosphine palladium(ll) (0.86 g, 1.2 mmol), copper iodide (0.23 g, 1.2 mmol) and triethylamine (1.7 ml_, 12.2 mmol) in toluene (30 ml.) was stirred at 100 0C under an atmosphere of nitrogen for six hours. After the reaction was complete, the reaction mixture was concentrated to yield a semi-solid residue. This residue was purified by flash chromatography on SiO2 (gradient elution using EtOAc/hexane 20/80) to yield the title compound as a white solid (1.47 g, 80% yield).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1945-84-2, 2-Ethynylpyridine, and friends who are interested can also refer to it.

Reference:
Patent; WYETH LLC; LI, David, Zenan; O’NEIL, Steven, Victor; SPRINGER, Dane, Mark; ZEGARELLI, Benjamin, Miller; WO2010/124047; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1945-84-2, 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. 1945-84-2, name is 2-Ethynylpyridine. A new synthetic method of this compound is introduced below.

General procedure: To a stirred solution of alkyne (1 mmol) in CH2Cl2 (3 mL), TsNBr2 (1.2 mmol) and DBU (1.2 mmol) was added. The progress of the reaction was monitored by TLC. After the completion of the reaction sodium thiosulfate (200 mg) was added to the reaction mixture and further stirred for 5 min. The reaction mixture was washed with water and extracted with ethyl acetate. The organic layer was separated and dried over Na2SO4 and concentrated in vacuo. Purification of the crude product by flash chromatography on silica gel (230-400mesh) with petroleum ether as eluent gave the desired product.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1945-84-2, 2-Ethynylpyridine, and friends who are interested can also refer to it.

Reference:
Article; Rajbongshi, Kamal Krishna; Hazarika, Debojit; Phukan, Prodeep; Tetrahedron; vol. 72; 29; (2016); p. 4151 – 4158;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 1945-84-2 ,Some common heterocyclic compound, 1945-84-2, molecular formula is C7H5N, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

General procedure: Catalyst (3 mol%) and phenylacetylene (0.5 mmol) were added to 2 mL DMSO solution. The mixture was stirred at 50 C under 1 atm pressure O2 for 6 h. The progress of the reaction was monitored by TLC. After completion of the reaction, 10 mL of ethyl acetate was added. The mixture was filtered through a pad of diatomite under reduced pressure, and the filtration residue was washed with ethyl acetate. Ethyl acetate was removed under reduced pressure. The residue was then purified by column chromatography on silica gel using petroleum ether as eluent to afford the corresponding 1,3-diynes.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1945-84-2, its application will become more common.

Reference:
Article; Ma, Zongyan; Wang, Xiaoyu; Wei, Shuoyun; Yang, Honglei; Zhang, Fengwei; Wang, Peng; Xie, Miao; Ma, Jiantai; Catalysis Communications; vol. 39; (2013); p. 24 – 29;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem