Month: March 2021

In an article, author is Amalorpavadoss, A., once mentioned the application of 106261-49-8, Name is 4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride, molecular formula is C13H20Cl2N2O2, molecular weight is 307.22, MDL number is MFCD07772867, category is piperazines. Now introduce a scientific discovery about this category, SDS of cas: 106261-49-8.

Synthesis and characterization of piperazine containing polyaspartimides blended polysulfone membranes for fuel cell applications

A new polyaspartimide was synthesized via a Michael addition reaction of an aromatic bismaleimide (BMI) with aminoethylpiperazine (AEP) at 1:1 molar ratio. IR and NMR spectral techniques were used for the characterization of the newly synthesized polyaspartimide (PAI). The copolymer, piperazine containing polyaspartimide, was then blended with polysulfone (Psf) at 3 and 6 wt % by dissolving in the solvent DMF. The blend membranes are studied for their water uptake, ion exchange capacity, swelling ratio, chemical stability, morphology, and proton conductivity. It is observed from morphological studies that the porous structure of polysulfone has been retained even after the incorporation of PAI. The percentage water uptake of membranes of different compositions reveals that the blending of copolymer PAI with polysulfone enhances the water uptake nature of the membrane. The chemical stability on membranes revealed that Psf/PAI-6% has a degradation of about 2.26% which is much lower than that of neat Psf membranes (3.43%), higher chemical stability. The neat Psf found to have an IEC value of 8.045 mmol/g and the IEC values increase with the addition of PAI. The highest value of IEC is obtained for the 6% PAI loaded Psf blend membrane with a value of 8.235 mmol/g. The study on the capacity of proton exchange has proved that the copolymer blend membrane is given higher proton conductivity to the extent of 4.09 x 10(-4) S cm(-1).

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

In an article, author is Rom, Tanmay, once mentioned the application of 109-01-3, Recommanded Product: 109-01-3, Name is 1-Methylpiperazine, molecular formula is C5H12N2, molecular weight is 100.1622, MDL number is MFCD00005966, category is piperazines. Now introduce a scientific discovery about this category.

Role of aromatic vs. aliphatic amine for the variation of structural, electrical and catalytic behaviors in a series of silver phosphonate extended hybrid solids

Four inorganic-organic hybrid silver phosphonate compounds, [Ag(C10H8N2)(H(4)hedp)] (1), [Ag-2(C10H8N2) (H(3)hedp)]center dot 2H(2)O (2), [C-4 H12N2HAg4(H(2)hedp)(2)] (3) and (C4H12N2][Ag-10(H(2)hedp)(4)(H2O)(2)]center dot 2H(2)O (4) (H(5)hedp = 1-hydroxyethane-1,1-diphosphonic acid), have been prepared by virtue of the variable amine-directed hydrothermal strategy. The subsequent roles of coordinated aromatic amine (4,4′-bipyridine) and coordination-free templated aliphatic amine (piperazine) are studied. The connectivity of the silver ions, diphosphonate units (hedp) and bipyridine moiety can give rise to the one-dimensional structure of 1 and two-dimensional layer structure of 2. In contrast, the silver ions and diphosphonate units are connected to form the tetrameric and pentameric silver cluster units in compound 3 and 4, respectively. Such clusters are rare examples of fundamental building units in the piperazine templated two-dimensional silver based layer structures. The room temperature dielectric studies show the extremely high dielectric permittivity of the amine templated compounds (3 and 4) compared to amine coordinated structures (1 and 2). The synthesized compounds also participate in various heterogenous catalytic reactions acting as active Lewis acid catalysts that are observed for the first time in the amine-templated metal organophosphonates. The observed band gaps and dielectric values suggest that compounds 3 and 4 are more promising candidates for electronic applications, while compounds 1 and 2 are comparatively better Lewis acid catalysts.

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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, Category: piperazines, 5625-37-6, Name is 2,2′-(Piperazine-1,4-diyl)diethanesulfonic acid, SMILES is O=S(CCN1CCN(CCS(=O)(O)=O)CC1)(O)=O, belongs to piperazines compound. In a document, author is Ebrahimiasl, Hakimeh, introduce the new discover.

Application of novel and reusable Fe3O4@Co-II(macrocyclic Schiff base ligand) for multicomponent reactions of highly substituted thiopyridine and 4H-chromene derivatives

In this research study we designed and synthesized Co-II(macrocyclic Schiff base ligand containing 1,4-diazepane) immobilized on Fe3O4 nanoparticles as a novel, recyclable, and heterogeneous catalyst. The nanomaterial was fully characterized using various techniques such as Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersiveX-ray spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, differential reflectance spectroscopy, Brunauere-Emmette-Teller method, inductively coupled plasma, and elemental analysis (CHNS). Then, the catalytic performance was successfully investigated in the multicomponent synthesis of 2-amino-4-aryl-6-(phenylsulfanyl)pyridine-3,5-dicarbonitrile and 2-amino-5,10-dioxo-4-aryl-5,10-dihydro-4H-benzo[g]chromene-3-carbonitrile derivatives. Furthermore, the catalyst was isolated using a simple filtration, and recovery of the nanocatalyst was demonstrated five times without any loss of activity.

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 5625-37-6. Category: piperazines.

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

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Product Details of 139755-85-4, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 139755-85-4, Name is 5-(2-Ethoxy-5-((4-(2-hydroxyethyl)piperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one, molecular formula is C23H32N6O5S. In an article, author is Casalone, Enrico,once mentioned of 139755-85-4.

1-benzyl-1,4-diazepane reduces the efflux of resistance-nodulation-cell division pumps inEscherichia coli

Aim:To investigate the action mechanism of 1-benzyl-1,4-diazepane (1-BD) as efflux pump inhibitor (EPI) inEscherichia colimutants: Delta acrABor overexpressing AcrAB and AcrEF efflux pumps.Materials & methods:Effect of 1-BD on: antibiotic potentiation, by microdilution method; membrane functionality, by fluorimetric assays; ethidium bromide accumulation, by fluorometric real-time efflux assay; AcrB expression, by quantitative photoactivated localization microscopy.Results:1-BD decreases the minimal inhibitory concentration of levofloxacin and other antibiotics and increase ethidium bromide accumulation inE. colioverexpressing efflux pumps but not in the Delta acrABstrain. 1-BD increases membranes permeability, without sensibly affecting inner membrane polarity and decreasesacrABtranscription.Conclusion:1-BD acts as an EPI inE. coliwith a mixed mechanism, different from that of major reference EPIs.

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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. 111974-74-4, Name is 11-(1-Piperazinyl)-dibenzo[b,f][1,4]thiazepine dihydrochloride, molecular formula is C17H19Cl2N3S. In an article, author is Ghalib, Lubna,once mentioned of 111974-74-4, Computed Properties of C17H19Cl2N3S.

Modeling the rate of corrosion of carbon steel using activated diethanolamine solutions for CO2 absorption

A mechanistic model is developed to investigate the influence of an activator on the corrosion rate of carbon steel in the absorption processes of carbon dioxide (CO2). Piperazine (PZ) is used as the activator in diethanolamine (DEA) aqueous solutions. The developed model for corrosion takes into consideration the effect of fluid flow, transfer of charge and diffusion of oxidizing agents and operating parameters like temperature, activator concentration, CO2 loading and pH. The study consists of two major models: Vapor-liquid Equilibrium (VLE) model and electrochemical corrosion model. The electrolyte-NRTL equilibrium model was used for determination of concentration of chemical species in the bulk solution. The results of speciation were subsequently used for producing polarization curves and predicting the rate of corrosion occurring at the surface of metal. An increase in concentration of activator, increases the rate of corrosion of carbon steel in mixtures of activated DEA. (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.

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