Tag: M.W:100-200

Fu, Tianyi; Ding, He; Zhang, Jingshuang; Bai, Peng; Lyu, Jiafei; Guo, Xianghai published an article about the compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine( cas:111-18-2,SMILESS:CN(C)CCCCCCN(C)C ).Safety of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:111-18-2) through the article.

Hierarchical aluminosilicate zeolites with uniform mesoporosity were successfully synthesized by one-stage crystallization under constant temperature with a novel single-head quaternary ammonium salt ([C18H37-N+(CH3)2-C6H12-N(CH3)2]Br-) as mesoporogen and structure-directing agent (SDA). Through precisely controlling the molar ratio of Si/Al and synthetic time, the mesoporous 3D wormhole framework (MCM-48) and crystalline microporous MFI structure were simultaneously constructed, revealed by a series of in-depth characteristic studies. Combining the advantages of the significantly improved diffusion from the mesoporous MCM-48 and the strong framework acidity of the crystalline microporous MFI zeolite, the hierarchical aluminosilicate zeolites exhibited outstanding catalytic activity with good reusability towards bulky aldol condensation compared with the conventional meso- or microporous zeolites.

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Thiazole | C3H3NS – PubChem,
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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《A disregarded complication in the synthesis of β-keto esters by the base-catalyzed acidolysis of diethyl acylmalonates》. Authors are Brandstrom, Arne.The article about the compound:2,6-Dimethyl-3,5-heptanedionecas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O).Safety of 2,6-Dimethyl-3,5-heptanedione. Through the article, more information about this compound (cas:18362-64-6) is conveyed.

cf. preceding abstract The main impurities in the preparation of β-keto esters from di-Et malonates according to the reaction RCOCH-(CO2Et)2 + RCO2H → RCOCH2CO2Et + RCO2Et + CO2 were studied. EtCOCH2CO2Et (I) was synthesized (preceding abstract). Fractionation gave 47 g. forerun, b7.5 40-68°, which with Cu(OAc)2 solution yielded the Cu derivative, m. 212°, of (EtCO)2CH2 (II), corresponding to 31 g. II, b9 59°. The 2 following fractions, b7.5 68-9° and 72-3°. were considered to be the enol and keto forms of I. The residue consisted chiefly of CH2(CO2Et)2, b7.5 79-81° (10% of the initial products). The products from the reaction of Me2CHCO2H with Me2CHCOCH(CO2Et2 showed a 1% yield of (Me2CHCO)2CH2, isolated as its Cu salt, m. 129°. The products from the reaction of PrCO2H and PrCOCH(CO2Et)2 could not be separated by distillation, and 10 g. of the distilled product was refluxed 3 hrs. with 100 cc. 20% H2SO4and the product steam-distilled to give 11% (PrCO)2CH2 (precipitated as the Cu derivative, m 157°). Equimol. amounts of AcCH(CO2Et)2 and AcCH2CO2Et (III) were refluxed 3 hrs. with a little MgO and Cu(OAc)2, and the mixture fractionated; fraction 1, b7.5 30-60°, gave 1.5 g. AcCH2COMe; fraction 2, b7.5 60- 75°, contained 6 g. III; fraction 3, b7.5 75-83°, gave 22 g. CH2(CO2Et)2 (S-benzylisothiuronium salt, m. 147°); and fraction 4, 10 g., b7.5 83-100°, gave Ac2CHCO2Et.

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SDS of cas: 111-18-2. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Bolaform surfactant-directed synthesis of TS-1 zeolite nanosheets for catalytic epoxidation of bulky cyclic olefins.

Hierarchical titanium silicalite-1 nanosheets (HTS-1) were hydrothermally synthesized by using a bolaform surfactant [C6H13-N+(CH3)2-C6H12-N+(CH3)2-(CH2)12-O-(p-C6H4)2-O-(CH2)12-N+(CH3)2-C6H12-N+(CH3)2-C6H13] [OH-]4 as the structure-directing agent. The resultant zeolite particles possessed not only a superior interlayer stability but also a unique house-of-cards-like structure by the 90° rotational boundary connectivity of TS-1 nanosheets directed by the π-π stacking interaction from the biphenyl group in the bolaform surfactant as well as content controllability of coordinated Ti species in the zeolite framework. The obtained HTS-1 samples were used as catalysts for the epoxidation of bulky cyclic olefins (cyclohexene and cyclooctene) and exhibited improved performance and superior recyclability in comparison with the conventional solely microporous TS-1 (CTS-1) catalyst as well as the mesoporous TS-1 (MTS-1) catalyst directed by the com. organosilane surfactant TPOAC, due to their exoteric interlayered mesopores and enlarged external surface areas providing more accessible Ti active sites for the bulky mol. reactants. Moreover, the optimized Ti content for the HTS-1 catalysts was proposed by fully taking into account the conversion and turnover frequency (TOF) values. In addition, the recyclability and stability of the HTS-1 catalysts in the epoxidation reaction and the post fluoride treatment to enhance their hydrophobicity as well as epoxidation activity were further discussed.

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Thiazole | C3H3NS – PubChem,
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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine( cas:111-18-2 ) is researched.Reference of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine.Liu, Xundao; Wu, Dianrui; Liu, Xu; Luo, Xiaohan; Liu, Yuqing; Zhao, Qiurong; Li, Jiajie; Dong, Dehua published the article 《Perfluorinated comb-shaped cationic polymer containing long-range ordered main chain for anion exchange membrane》 about this compound( cas:111-18-2 ) in Electrochimica Acta. Keywords: perfluorinated comb shaped cationic polymer long chain order; anion exchange membrane fuel cell. Let’s learn more about this compound (cas:111-18-2).

Achieving high ionic conductivity and alk. stability of anion exchange membranes (AEMs) is critical for anion exchange membrane fuel cells (AEMFCs). Here the authors described a method of preparing perfluorinated comb-shaped cationic polymers containing long-range ordered (LROed) -CF2CF2-(CF2CF2)n-CF2-CF2- main chain with pendant (-CF2CF2SONH-) side chain terminated by long comb-hydrophilic-cationic groups for AEMs application. Super-hydrophobic backbone promoted the formation of defined nano-phase separated channels and the resulted comb-shaped AEMs demonstrated ion conductivity of 88.6 mS cm-1 at 80° and kept low H2O uptake (17.1%) and excellent dimensional stability (7.0%). Chem. robust polymer skeleton reduced hydroxide ion attack at fixed cation group and 91.8% of initial values was retained after Hoffman elimination in 8 M KOH over 16 days at 80°. Also, a membrane electrode assembly (MEA) based on perfluorinated-comb AEMs showed a peak power d. of 306.1 mW cm-2 at 80° in a H2/O2 (CO2-free) fuel cells.

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Thiazole | C3H3NS – PubChem,
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Synthetic Route of C10H24N2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Using a switchable water to improve sustainable extraction for oil sands by low-concentration surfactant solution. Author is Li, Xiaojiang; Wang, Li; Lu, Hongsheng; Wang, Na; Wang, Baogang; Huang, Zhiyu.

Surfactant extraction is the common method for treating oil sands. However, the recovery of traditional surfactant is difficult, and the oil emulsification phenomenon and generation of tailings are also caused easily. To develop the cleaner and sustainable approach for treating oil sands, a switchable water N, N, N’, N””-tetramethylhexanediamine (TMHDA) was used to improve extraction by surfactant sodium dodecyl benzene sulfonate (SDBS) solution with low concentration Here, the TMHDA-containing SDBS solution has CO2 switchability because of the electrostatic interaction between SDBS solution and TMHDA with CO2 response, and can be also emulsify reversibly n-heptane, diesel oil, even crude oil, providing the possibility for separating oil from oil sands. The effective extraction of oil sands is performed by 1 mM (less than critical micelle concentration (CMC)) SDBS solution combined with TMHDA, which was also demonstrated by thermogravimetric analyzer, scanning electron microscope and elemental anal. The residual oil content of oil sands is reduced to 0.515 wt% and 90.8% oil is removed by adding 0.15 g/mL TMHDA. Interestingly, oil is separated and fine sands is separated by introducing CO2, and the TMHDA-containing SDBS is recycled upon N2/65°C. According to the detection of interfacial tension and Fourier Transform IR Spectroscopy (FTIR), it is demonstrated that the improved oil removal is ascribed to the adsorption of SDBS on solid surface and the reduced oil-water interface tension by the addition of TMHDA. Based on the evaluation of economic and environmental value, this sustainable approach exhibits potential application for treating oil sands in practical industry.

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Computed Properties of C9H16O2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about An improved asymmetrically modified nickel catalyst prepared from ultrasonicated Raney nickel. Author is Tai, Akira; Kikukawa, Tadashi; Sugimura, Takashi; Inoue, Yoshihisa; Abe, Satoshi; Osawa, Tsutomu; Harada, Tadao.

The ultrasonic irradiation of Raney nickel catalyst in water followed by the removal of the resulting turbid supernatant gave an excellent nickel catalyst (RNi-U) which generated an asym.-modified nickel catalyst. An EPMA (SEM-EDX) study indicated that RNi-U consisted of a fairly pure nickel surface of homogeneous size. Tartaric acid-NaBr-modified RNi-U (TA-NaBr-MRNi-U) showed a high enantio-differentiating ability as well as reactivity in the hydrogenation of prochiral ketones such as 1,3-diones and 3-oxoalkanoic acid esters.

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Thiazole | C3H3NS – PubChem,
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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Bernardi, Sarah; Renault, Margareth; Malabirade, Antoine; Debou, Nabila; Leroy, Jocelyne; Herry, Jean-Marie; Guilbaud, Morgan; Arluison, Veronique; Bellon-Fontaine, Marie-Noelle; Carrot, Geraldine researched the compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine( cas:111-18-2 ).Safety of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine.They published the article 《Robust Grafting of Polyionenes: New Potent and Versatile Antimicrobial Surfaces》 about this compound( cas:111-18-2 ) in Macromolecular Bioscience. Keywords: polyionene antimicrobial surface grafting; antimicrobial surfaces; grafted polymers; polyionenes; proadhesive surfaces; surface-polymerization. We’ll tell you more about this compound (cas:111-18-2).

Polyionenes (PI) with stable pos. charges and tunable hydrophobic spacers in the polymer backbone, are shown to be particularly efficient regarding antimicrobial properties. This effect can be modulated since it increases with the length of hydrophobic spacers, i.e., the number of methylene groups between quaternary ammoniums. Now, to further explore these properties and provide efficient antimicrobial surfaces, polyionenes should be grafted onto materials. Here a robust grafting strategy to covalently attach polyionenes is described. The method consisted in a sequential surface chem. procedure combining polydopamine coating, diazonium-induced polymerization, and polyaddition To the best of knowledge, grafting of PI onto surfaces is not reported earlier. All chem. steps are characterized in detail via various surface anal. techniques (FTIR, XPS, contact angle, and surface energy measurements). The antibacterial properties of polyionene-grafted surfaces are then studied through bacterial adhesion experiments consisting in enumeration of adherent bacteria (total and viable cultivable cells). PI-grafted surfaces are showed to display effective and versatile bacteriostatic/bactericidal properties associated with a proadhesive effect.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Application of 18362-64-6. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about CO2 sensing property of CuO-BaTiO3 mixed oxide film prepared by self-assembled multibilayer film as a precursor. Author is Ishihara, Tatsumi; Takagi, Toshiaki; Ito, Masami; Nishiguchi, Hiroyasu; Takita, Yusaku.

Preparation of CuO-BaTiO3 mixed oxide thin film by the decomposition of a self-assembled multibilayer film as a mol. template was studied. Also, CO2 sensing property of the resultant thin film was studied as a capacitive type sensor. The self-assembled bilayer film of few 1000 layers thickness can be obtained easily by casting an aqueous suspension consisting of dimethyldihexadecylammonium bromide (DC1-16), Cu(ClO4)2, Ba(TiO(C2O4)2), 2,6-dimethyl-3,5-heptadione (DHP), and polyvinyl alc. Divalent copper ion (Cu2+) which is associated with 2 DHP mols. was incorporated into the mol. bilayer film and BaTiO3 precursor exists at the interspace of mol. bilayer film by coordinating with polyvinyl alc. Upquenching the organic-inorganic film at 1173 K leads to the uniform film of CuO-BaTiO3 oxide mixture Although operating temperature shifted to higher temperature, the resultant film exhibits the capacitance change upon exposure to CO2. Consequently, the mixed oxide film of CuO-BaTiO3 prepared by the decomposition of multibilayer film was also an appropriate capacitive type CO2 sensor.

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Thiazole | C3H3NS – PubChem,
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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine(SMILESS: CN(C)CCCCCCN(C)C,cas:111-18-2) is researched.Category: tetrahydroquinoline. The article 《Task-specific deep eutectic solvents for the highly efficient and selective separation of H2S》 in relation to this compound, is published in Separation and Purification Technology. Let’s take a look at the latest research on this compound (cas:111-18-2).

Developing environmental benign and efficient solvents for the natural gas sweetening is of great significance to the development of green chem. However, there is no task-specific deep eutectic solvents (DESs) for H2S absorption so far. Herein, we have for the first time developed a series of task-specific DESs for the selective separation of H2S, in which quaternary ammonium salts with free tertiary amine groups are designed as hydrogen bond acceptors (HBAs) and azoles as hydrogen bond donors (HBDs). D., viscosity, and thermal decomposition temperature, as well as the solubility of H2S (0-1.0 bar), CO2 (0-1.0 bar), and CH4 (0-5.0 bar) were systematically determined NMR paired with theor. calculations are applied to characterize the interaction mechanism of H2S and DESs. A reaction equilibrium thermodn. model (RETM) with a 1:2 stoichiometric reaction mechanism was screened to correlate H2S solubility data. It is found that [C4-TMHDA][Cl]-Im could achieve up to 0.996 mol H2S per mol DES at 303.2 K and 1.0 bar. Moreover, the captured H2S can be easily stripped out at elevated temperature and reduced pressure, with negligible loss in H2S capacities during four absorption-desorption cycles. The results obtained in this work indicate that these DESs are promising candidates for efficient and selective separation of H2S and CO2 from natural gas. This work provides novel insights into the future design of high-performance task-specific DESs for the capture of H2S.

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Synthetic Route of C10H24N2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Synthesis and antifungal activities of hydrophilic cationic polymers against Rhizoctonia solani. Author is Zhong, Weiqiang; Chang, Yaoyao; Lin, Yaling; Zhang, Anqiang.

A series of linear hydrophilic cationic polymers with different charge d. and mol. weights were synthesized by one-step polymerization process. The effect of the hydrophobicity and mol. weights on the antifungal activity against Rhizoctonia solani (R. solani) and Fusarium oxysporum f. sp. cubense race 4 (Foc4) was assessed. The biotoxicity of the cationic polymers were evaluated based on their median lethal concentration (LC50) for zebrafish and silkworm and median LD (LD50) for Kunming mice. The results indicated that the balance between antifungal activity and biotoxicity could be well tuned by controlling the hydrophobic-hydrophilic balance. The min. inhibitory concentration (MIC) of PEPB10 and PEPB25 against R. solani were 160μg/mL and 80μg/mL, resp. And the LD50 for Kunming mice of PEPB10 and PEPB25 were more than 5000 mg/kg, which mean that PEPB10 and PEPB25 with high hydrophilicity show low toxicity and better selectivity for R. solani. The cationic polymers can kill the R. solani by damaging their membranes and exchanging the Ca2+ or/and Mg2+ cations of their membranes or cell wall. These results help to understand the antifungal mechanism of low-toxic polymeric quaternary ammonium salts and highlight their potential application as highly selective fungicidal agents for controlling plant diseases.

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