Tag: M.W:100-200

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, Recommanded Product: 1-Methylpiperazine109-01-3, Name is 1-Methylpiperazine, SMILES is CN1CCNCC1, belongs to piperazines compound. In a article, author is Cui, Qiufang, introduce new discover of the category.

CO2 capture cost saving through waste heat recovery using transport membrane condenser in different solvent-based carbon capture processes

In this study, the waste heat from the hot stripping gas was recovered by adopting the transport membrane condenser (TMC) in the monoethanolamine (MEA)-, diethanolamine (DEA)-, piperazine (PZ)- and potassium glycinate (PG)-based rich-split modified carbon capture processes. A 220-h test showed that TMC can exhibit a good stability on the waste heat recovery performance. The PZ-based TMC-modified rich-split process (i.e., PZ-case) achieved a highest waste heat recovery performance, followed by the PG-case, MEA-case and DEA-case. A strong linear relationship between the heat and water fluxes was observed during the waste heat recovery. Three scenarios were considered for comparing the CO2 capture cost savings of 4 cases. When the TMC area was fixed meaning the same additional investment of rich-split modification, PZ-case gained the highest CO2 capture cost saving ($6.40/t-CO2), followed by PG, MEA- and DEA-case. When a fixed waste heat recovery performance of 600 kJ/kg-CO2 was required for obtaining the same revenue after rich- split modification, PZ- and PG-case obtained the same CO2 capture cost saving of $4.22/t-CO2. Moreover, when the reboiler duty reduction potential was aimed at 15%, PG-case achieved the maximum CO2 capture cost saving ($4.56/t-CO2). (C) 2020 Elsevier Ltd. All rights reserved.

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 109-01-3. Recommanded Product: 1-Methylpiperazine.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

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. 16153-81-4, Name is 4-(4-Methylpiperazin-1-yl)phenylamine, molecular formula is C11H17N3. In an article, author is Sharif, Maimoona,once mentioned of 16153-81-4, Category: piperazines.

Evaluation of CO2 absorption performance by molecular dynamic simulation for mixed secondary and tertiary amines

CO2 emission to the atmosphere is the most prominent cause of climate change and a major risk to environmental health. Although several techniques are very promising to reduce the CO2 emission from central emission points, the CO2 absorption by amines remains the most mature and reliable technology. Yet, there is more potential to improve absorption performance by choosing suitable solvents. Thus, the present research is intended to explore a better solvent combination for CO2 absorption by adopting the amine absorption process using molecular dynamic simulation. The study is designed to compare the intermolecular interactions of N-C and N-H bond between single 2EAE, DMAE (or 2DMAE), and blended solvent, i.e., 2EAE/PZ, 2DMAE/PZ with carbon dioxide and water and then to catch the effect of piperazine on these amines. The molecular dynamic simulations were performed by using the Material Studio application. The solvent concentration, 30 wt% under the condition of 313 K temperature at 0.1 MPa pressure, was taken for solvent systems. The results were interpreted by the Radial Distribution Function analysis. It was found that the blend of secondary and tertiary amines with piperazine 2EAE/PZ, DMAE/PZ reflect higher intermolecular interaction with CO2 as compared to single DMAE & 2EAE. This finding shows that piperazine acts as a promoter on 2EAE and 2DMAE when interacting with CO2.

Interested yet? Keep reading other articles of 16153-81-4, you can contact me at any time and look forward to more communication. Category: piperazines.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

Electric Literature of 16153-81-4, 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. 16153-81-4, Name is 4-(4-Methylpiperazin-1-yl)phenylamine, SMILES is NC1=CC=C(N2CCN(C)CC2)C=C1, belongs to piperazines compound. In a article, author is Rai, Sunil K., introduce new discover of the category.

Salts and Cocrystal of Etodolac: Advantage of Solubility, Dissolution, and Permeability

Etodolac (ETD) is a nonsteroidal anti-inflammatory drug (NSAID) approved by the United States Food and Drug Administration (US-FDA) in 1991 for the treatment of rheumatoid arthritis. Because of its poor aqueous solubility and high permeability, ETD falls under Biopharmaceutics Classification System (BCS) Class II drug. The present study was aimed to screen stable salts and cocrystals of ETD using Generally Recognized as Safe (GRAS) and a few non-GRAS coformers. Crystallization of five salts (i.e., isopropylamine = isoPA, n-hexylamine = nHA, cyclohexylamine = cycloHA, 2-phenylethylamine = phEA, piperazine = PPZ) and one cocrystal (isonicotinamide = INT) was successful. These products were characterized by single crystal X-ray and powder diffraction. Differential scanning calorimetry (DSC) showed a single endotherm for the salts, which confirmed their thermal stability and phase homogeneity, except for ETD(-center dot)phEA(+) where a solid-solid transition at 152 degrees C was observed with an enthalpy of transition Delta H approximate to 16 J/g. Among the five salts, ETD(-center dot)isoPA(+) showed the highest solubility of 267.50 mg/mL and similar to 20 times faster intrinsic dissolution rate than ETD in pH 7.0 phosphate buffer medium. The salts are stable under solubility and dissolution conditions as confirmed by fitting the powder X-ray diffraction profile of each sample after the experiment with the calculated lines from the X-ray structure. Permeability and flux analysis of ETD salts showed that ETD(-center dot)isoPA(+) exhibits a high flux rate across the semipermeable membrane due to a higher molecular mobility and greater concentration gradient.

Electric Literature of 16153-81-4, 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 16153-81-4 is helpful to your research.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

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, 5308-25-8, Name is 1-Ethylpiperazine, SMILES is CCN1CCNCC1, belongs to piperazines compound. In a document, author is Moghzi, Faezeh, introduce the new discover, Name: 1-Ethylpiperazine.

0D to 3D Pr-III metal-organic networks crystal engineered for optimal iodine adsorption

Four new praseodymium(III) metal-organic compounds varying in dimensionality from 0D to 3D have been designed and synthesized based on N-heterocyclic polycarboxylic acids, including pyridine-2,6-dicarboxylic acid (H(2)pydc) and pyrazine-2,3-dicarboxylic acid (H(2)pzdc). Altering the concentration of piperazine (pip, ancillary ligand) enables control over the dimensionality of the compound by switching between the 0D [H(2)pip][Hpip][Pr(pydc)(3)]center dot 4H(2)O (I) and the 1D {[Pr(pydc)( Hpydc)(H2O)(2)]center dot 4H(2)O}(n) (II) coordination polymer (CP). Upon replacing H(2)pydc with H2pzdc, CP II is converted to the 2D CP [Pr(pzdc)(Hpzdc)(H2O)(3)](n) (III) and using the metalloligand [Zn(Hpzdc)(2)(H2O)(2)](2-) the 3D heterometallic CP {[Pr2Zn(pzdc)(4)(H2O)(6)]center dot 2H(2)O}(n) (IV) is formed. Compound IV shows high stability in the absence of uncoordinated solvent molecules and is stable up to 400 degrees C, even in the presence of humidity. Therefore, IV was utilized for iodine adsorption in the vapour phase and in the presence of humidity. The results confirm the remarkable potential of IV for reversible adsorption of iodine vapour.

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 5308-25-8 is helpful to your research. Name: 1-Ethylpiperazine.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

Synthetic Route of 109-01-3, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 109-01-3, Name is 1-Methylpiperazine, SMILES is CN1CCNCC1, belongs to piperazines compound. In a article, author is Asar, Farzane Jafari, introduce new discover of the category.

Direct synthesis of piperazines containing dithiocarbamate derivatives via DABCO bond cleavage

DABCO bond cleavage with dithiocarbamic acid salts was applied as a direct synthetic route for the preparation of a novel category of piperazines containing dithiocarbamate functional group. This metal-free and operationally simple approach can be applied with good to excellent yields and high selectivity. Besides, substituted bis-piperazines and piperidines containing dithiocarbamate groups were successfully prepared via the same protocol using quaternized quinuclidine and bis-quaternized DABCO. (C) 2020 Elsevier Ltd. All rights reserved.

Synthetic Route of 109-01-3, 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 109-01-3.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 5308-25-8, Name is 1-Ethylpiperazine, molecular formula is C6H14N2, belongs to piperazines compound. In a document, author is Sanad, Sherif M. H., introduce the new discover, Category: piperazines.

Piperazine-mediated tandem synthesis of bis(thieno[2,3-b]pyridines): Versatile precursors for related fused [1,2,4]triazolo[4,3-a]pyrimidines

In this study, we discuss the utility of bis(cyanoacetamides) as versatile precursors to the piperazine-mediated synthesis of a wide spectrum of bis(thieno[2,3-b]pyridine) derivatives, linked to aliphatic spacers via thioethers. The proposed tandem protocol involved the reaction of bis(cyanoacetamides) with two equivalents of the appropriate cinnamonitriles in dioxane in the presence of six equivalents of piperazine at reflux for 4 hours. Then, two equivalents of the appropriate halogen-containing reagents were added and the reaction was heated at reflux for further 3 hours. The bis(thieno[2,3-b]pyridines) were taken as a key intermediates to new bis(4-oxopyrido[3 ‘,2 ‘:4,5]thieno[3,2-d]pyrimidines). The above derivatives were reacted with the appropriate hydrazonyl chloride derivatives in dioxane in the presence of triethylamine to yield the corresponding bis([1,2,4]triazoles) with a related fused pyridothienopyrimidine moiety. The new structures were elucidated by IR, NMR spectral data, as well as elemental analyses.

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 5308-25-8. Category: piperazines.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

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, 16153-81-4, Name is 4-(4-Methylpiperazin-1-yl)phenylamine, SMILES is NC1=CC=C(N2CCN(C)CC2)C=C1, in an article , author is Guo, Wei, once mentioned of 16153-81-4, Recommanded Product: 4-(4-Methylpiperazin-1-yl)phenylamine.

Supramolecular adducts of mesocyclic diamines with various carboxylic acids: Charge-assisted hydrogen-bonding in molecular recognition

Aggregation of saturated mesocyclic diamine 1,4-diazacycloheptane (dach) or piperazine (pipz) and diversiform carboxylic acids with mono- or di-carboxyls yields a series of novel binary supramolecular adducts via two-point molecular recognition. All the supramolecular assemblies were obtained by solvent evaporation method from different media. X-ray single-crystal diffraction analyses reveal that these supramolecular moieties present 1D chain motif, 2D flat, corrugated sheet structures and 3D CdSO4, pillar-layered networks through carboxylate-amide N-H center dot center dot center dot O, as well as its proton transfer form N+-H center dot center dot center dot O-, carboxyl head to tail O-H center dot center dot center dot O, and extended hydrogenbonding interactions. Their compositions and structures were also confirmed by Fourier transform infrared (FT-IR) spectroscopy. Thermal stability of these binary crystalline adducts has been investigated by thermogravimetric analysis (TGA), suggesting similar thermal stabilities. (C) 2020 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.

Interested yet? Read on for other articles about 16153-81-4, you can contact me at any time and look forward to more communication. Recommanded Product: 4-(4-Methylpiperazin-1-yl)phenylamine.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Li, Zerui, once mentioned the application of 5308-25-8, Name is 1-Ethylpiperazine, molecular formula is C6H14N2, molecular weight is 114.1888, MDL number is MFCD00059912, category is piperazines. Now introduce a scientific discovery about this category, Category: piperazines.

Organic Amines as Targeting Stabilizer at the Polymer/Fullerene Interface for Polymer:PC61BM Solar Cells

Herein, it is demonstrated that a small amount (0.05% in weight ratio) of polyethyleneimine (PEI) can effectively suppress the burn-in degradation of both PTB7-Th:PC61BM and P3HT:PC61BM cells, similar to the piperazine derivatives, suggesting that organic amines can serve as universal stabilizer in polymer:PC61BM solar cells. Light-induced electron spin resonance (LESR) spectroscopy measurement shows a higher ESR signal intensity of PC61BM anions in 0.2% PEI-doped film than in 1% piperazine-doped film. Moreover, no piperazine is detected in a 10% (w/w) piperazine-doped film by gas chromatography-mass spectrometry (GS-MS). These results suggest that the residual piperazine in the blend film is very low, which can be understood by the high volatility of piperazine. Quantum calculations are performed on the intermolecular binding energy (E-B) between polymer (using model repeating units), PC61BM, and piperazine molecules. Results reveal that piperazine prefers to localize at the polymer:fullerene interface by complexing with PC61BM (in P3HT:PC61BM) or PTB7-Th (in PTB7-Th:PC61BM system), which indicates that the photo dimerization of PC61BM which causes the burn-in degradation of polymer:fullerene solar cells mainly happens at the donor/acceptor interface, and the organic amine serves as the targeting stabilizer at the interface.

Do you like my blog? If you like, you can also browse other articles about this kind. Thanks for taking the time to read the blog about 5308-25-8, Category: piperazines.

Reference:
Piperazine – Wikipedia,
,Piperazines – an overview | ScienceDirect Topics

57184-25-5, 1-(Cyclopropylmethyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,57184-25-5

First, 5-amino-2-(2-furyl)[1,2,4]triazolo[1,5-c]pyrimidine-7-carboxylic acid (500 mg, 2.04 mmol) produced in Example 77 was dissolved in DMF (50 mL), and 4-cyclopropylmethylpiperazine (429 mg, 3.06 mmol), 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide monohydrochloride (782 mg, 4.08 mmol), and 1-hydroxybenzotriazole (312 mg, 2.04 mmol) were added to the resulting solution, followed by stirring at room temperature for 12 hours. Then, THF (30 mL), acid chloride resin [3.0 g, the acid chloride resin being prepared by the method described in the document (Tetrahedron Letters, Vol. 37, No. 40, p. 7193 (1996))] and polyvinylpyridine resin (produced by Aldrich Co., 3.0 g) were added to the reaction solution, followed by further stirring at room temperature for 12 hours. The resins were filtered off from the reaction solution, and the filtrate was concentrated. The residue was recrystallized from a mixed solvent of ethanol (10 mL) and DMF (10 mL) to obtain Compound 96 (420 mg, 1.14 mmol) as white crystals in a yield of 56%.1H NMR (delta ppm, DMSO-d6): 8.18 (brs, 2H), 7.95 (d, J=1.7 Hz, 1H), 7.22 (d, J=3.3 Hz, 1H), 7.00 (s, 1H), 6.73 (dd, J=3.3 Hz, 1.7 Hz, 1H), 3.50-3.65 (m, 2H), 3.40-3.45 (m, 2H), 2.40-2.50 (m, 4H), 2.21 (d, J=6.6 Hz, 2H), 0.83 (m, 1H), 0.43-0.49 (m, 2H), 0.06-0.08 (m, 2H) Mass (m/z): 368 (M++1) IR (KBr, cm-1): 1656, 1641, 1633, 1616, 1610, 1558, 1003 [] Elemental Analysis: as C18H21N7O2¡¤0.4 H2OObservedC 57.56%,H 5.95%,N 26.59%CalculatedC 57.71%,H 5.87%,N 26.17%Melting point: 299.2 – 299.8C

As the paragraph descriping shows that 57184-25-5 is playing an increasingly important role.

Reference£º
Patent; KYOWA HAKKO KOGYO CO., LTD.; EP1544200; (2005); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

21655-48-1, cis-2,6-Dimethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

21655-48-1, EXAMPLE 24 Cis-3,5-dimethyl-1-(4-nitro-phenyl)-piperazine A suspension of 6.74 g (47.8 mmol) of 4-fluoro-nitro-benzene and 10.91 g (95.5 mmol) of cis-2,6-dimethyl-piperazine is heated at 45¡ã C. for 1 hour. The reaction mixture is cooled and shaken with dichloromethane and water. The organic layer is dried (magnesium sulfate) and concentrated to give 11.62 g (>100percent) of the product as a solid.

21655-48-1 cis-2,6-Dimethylpiperazine 6950261, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; Booth, Richard John; Dobrusin, Ellen Myra; Josyula, Vara Prasad Venkata Nagendra; McNamara, Dennis Joseph; Toogood, Peter Laurence; US2003/73668; (2003); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics