Month: November 2022

Jovic, Branislav published the artcileAmides as a model system of low molar mass algal organic matter. Influence on the adsorption of p-nitrophenol on activated carbon, HPLC of Formula: 123-39-7, the main research area is amide water activated carbon nitrophenol adsorption equilibrium diffusivity parameter.

In this study, the adsorption equilibrium and diffusivity parameters of p-nitrophenol were estimated for water containing different concentrations of secondary amides. Com. powd. activated carbon was used as an adsorbent. The external mass transfer coefficient (kf), the surface diffusion coefficient (Ds) and the standard free Gibbs energy were calculated for p-nitrophenol in the presence of different secondary amide concentrations The anal. established that there are correlations between structural parameters of amides, on the one hand, and diffusion and thermodn. parameters for p-nitrophenol adsorption process, on the other. It was noticed that voluminous hydrophobic amides decreased the adsorption capacity of p-nitrophenol on activated carbon. On the basis of the results obtained for external mass transfer coefficients, it is assumed that amides cause the reduction of adsorption capacity of p-nitrophenol onto activated carbon by concentrating at the solid/liquid interface.

Arabian Journal of Chemistry published new progress about Adsorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Cheng, Xian published the artcileExperimentally determined strengths of favorable and unfavorable interactions of amide atoms involved in protein self-assembly in water, COA of Formula: C2H5NO, the main research area is protein folding self assembly amide hydrogen bonding sp interaction; additivity; amide atom interactions; aqueous interactions; preferential interactions; thermodynamics.

Folding and other protein self-assembly processes are driven by favorable interactions between O, N, and C unified atoms of the polypeptide backbone and side chains. These processes are perturbed by solutes that interact with these atoms differently than water does. Amide NHA·A·A·O=C hydrogen bonding and various π-system interactions have been better characterized structurally or by simulations than exptl. in water, and unfavorable interactions are relatively uncharacterized. To address this situation, we previously quantified interactions of alkyl ureas with amide and aromatic compounds, relative to interactions with water. Anal. yielded strengths of interaction of each alkylurea with unit areas of different hybridization states of unified O, N, and C atoms of amide and aromatic compounds Here, by osmometry, we quantify interactions of 10 pairs of amides selected to complete this dataset. An anal. yields intrinsic strengths of six favorable and four unfavorable atom-atom interactions, expressed per unit area of each atom and relative to interactions with water. The most favorable interactions are sp2O-sp2C (lone pair-π, presumably n-π*), sp2C-sp2C (π-π and/or hydrophobic), sp2O-sp2N (hydrogen bonding) and sp3C-sp2C (CH-π and/or hydrophobic). Interactions of sp3C with itself (hydrophobic) and with sp2N are modestly favorable, while sp2N interactions with sp2N and with amide/aromatic sp2C are modestly unfavorable. Amide sp2O-sp2O interactions and sp2O-sp3C interactions are more unfavorable, indicating the preference of amide sp2O to interact with water. These intrinsic interaction strengths are used to predict interactions of amides with proteins and chem. effects of amides (including urea, N-ethylpyrrolidone [NEP], and polyvinylpyrrolidone [PVP]) on protein stability.

Proceedings of the National Academy of Sciences of the United States of America published new progress about Additivity. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, COA of Formula: C2H5NO.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Rakipov, Ilnaz T. published the artcileFTIR spectral study of intermolecular interactions of C=O groups of amides in solution, Application In Synthesis of 123-39-7, the main research area is amide solution intermol interaction FTIR spectra.

The work is devoted to the evaluation and anal. of intermol. interactions of amides in solution The absorption frequencies of the C = O groups of N-methylformamide, N-methylacetamide, N,N-dimethylformamide, and N,N-dimethylacetamide in a series of solvents were measured by IR spectroscopy. An approach based on the thermochem. parameter SVW was used in order to estimate the contributions in intermol. interaction. Solvation effects on the stretching vibrations of the C = O groups of the amides were evaluated in this work and the same type of effects of the medium on the frequencies of the C = O groups of different amides was shown. The absorption frequencies of the C = O groups of N-methylformamide and N,N-dimethylformamide with methanol, ethanol or butanol in aprotic and proton-donor solvents were measured. The cooperative effects of hydrogen bonds of C = O groups of amides in the environment of associated solvents have been evaluated.

Journal of Molecular Liquids published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Application In Synthesis of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Sun, Lihua published the artcileSolubility, density and refractive index of formamide/N-methylformamide/N, N-dimethylformamide + rubidium bromide/cesium bromide + water ternary systems, Recommanded Product: N-Methylformamide, the main research area is formamide DMF rubidium bromide water ternary system refractive index.

The Solubility, d. and refractive index of the formamide(FA)/N-methylformamide(NMF)/N,N-dimethylformamide(DMF) + rubidim bromide/cesium bromide+ water ternary systems were determined at (283.15, 298.15 and 313.15) K. The solubility of the RbBr and CsBr decrease significantly when adding amides into the aqueous solution The variation trend of d. is consistent with solubility, and the change of the refractive index is different. The isothermal exptl. solubility was correlated by the NRTL model and the UNIQUAC model. The isothermal solubility, d. and refractive index of the ternary systems were fitted by the four parameter equation. Moreover, the mean activity coefficients of the FA/NMF/DMF + RbBr/CsBr + H2O systems at exptl. temperatures were obtained through the UNIQUAC model. Besides, to investigate the temperature effect on the solid-liquid equilibrium, the multiple temperatures solubility was fitted by the modified Apelbl at equation and the λh equation.

Journal of Molecular Liquids published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Recommanded Product: N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Belic, Sanja published the artcileThermochromic behaviour and thermodynamics of cobalt(II) chloride complexes in ammonium nitrate + N-methylformamide mixture, Computed Properties of 123-39-7, the main research area is cobalt chloride complex ammonium nitrate methylformamide mixture thermodn.

In this paper thermochromic features of cobalt(II) were investigated in the binary mixture containing inorganic salt (ammonium nitrate) and mol. solvent (N-methylformamide) in order to find responsive thermochromic medium for possible application in a greenhouses for auto-regulated shading and solar protection. Absorption spectra of cobalt(II) in the NH4NO3 + zNMF (z = 3, 4, 5, 6 and 20) binary mixtures were recorded in the visible wavelength range in the presence of different cobalt(II) and chloride concentrations at five selected temperatures: 308.15; 318.15; 328.15; 338.15 and 348.15 K. From the obtained spectra, geometry, composition and speciation of the complexes were discussed. Influences of the temperatureand mixture composition on the absorption spectra were also analyzed. From an anal. of the spectra using two computer programs, it was concluded that the following complexes were formed: [Co(NO3)4(NMF)2]2-, [CoCl3(NO3)(NMF)2]2-and [CoCl4]2-. For these complexes stability constants were determined at all temperatures Thermodn.parameters were also calculated using the temperaturedependence of calculated stability constants

Journal of Molecular Liquids published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Computed Properties of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Zhang, Deyi published the artcileHalogen Bond Involved Post-Treatment for Improved Performance of Printable Hole-Conductor-Free Mesoscopic Perovskite Solar Cells, Synthetic Route of 123-39-7, the main research area is post treatment mesoscopic perovskite solar cell.

Perovskite solar cells (PSCs) are considered to be the most promising next-generation photovoltaic technol. Among all the configurations of PSCs, the printable hole-conductor-free mesoscopic PSC (p-MPSC) has unique advantages on low cost, large-area fabrication and fabulous stability, which endows it with the greatest potential for industrialization. The interfacial recombination losses, especially at the perovskite/carbon interface, are the bottleneck for further improving the power conversion efficiency (PCE) of p-MPSCs. 2-Bromo-6-fluoronaphthalene is introduced as an interfacial modulator for p-MPSCs through post-treatment. The bromo-terminal acts as an electrophilic site to interact with the iodine ion in perovskite via the noncovalent halogen bond. Meanwhile, the fused ring of naphthalene is capable to accommodate electron d. that is attracted from the perovskite. This interaction induces a more favorable band structure at the interface. The hole extraction is promoted and the interfacial nonradiative recombination is inhibited. Accordingly, a champion p-MPSC with an improved PCE of 16.77% from 15.50% of the pristine device is obtained.

Solar RRL published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Synthetic Route of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Bougie, Francis published the artcileNovel non-aqueous MEA solutions for CO2 capture, Name: N-Methylformamide, the main research area is carbon dioxide capture monoethanolamine air pollution control.

Present obstacles for CO2 capture involve reducing capital and energy costs. This study describes carbon dioxide capture with monoethanolamine (MEA) in organic solvents as a way to reduce the energy consumption during desorption. The solvents used in this study are a mixture of ethylene glycol and 1-propanol (EG/PrOH), diethylene glycol monoethyl ether (DEGMEE), and N-methylformamide (NMF). A microwave regeneration technique was used to easily and quickly screen the performances of the amine solutions and experiments were designed to investigate the solvent effects on CO2 capture by MEA. Globally, DEGMEE solutions resulted in the lowest energy consumptions and good CO2 cyclic capacities; the best solutions reducing the energy consumption by 78% in comparison to the traditional 30 wt% MEA aqueous solution These findings show that organic solvents have much promise in improving CO2 capture technol. It was also found that using NMF greatly enhanced the CO2 absorption kinetics but was detrimental during the desorption step.

International Journal of Greenhouse Gas Control published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Name: N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Li, Yongwang published the artcileA study on the rules of ligands in highly efficient Ru-amide/AC catalysts for acetylene hydrochlorination, SDS of cas: 123-39-7, the main research area is ruthenium amide formamide formanilide benzanilide hydrochlorination catalyst synergistic effect.

To explore the role of substituents on ligands in the modification of metal catalysts, a series of Ru-amide/AC catalysts are synthesized with various amide ligands derived from formamide and assessed for acetylene hydrochlorination. Activity evaluation reveals a rule that replacing a hydrogen on formamide with an electron donor substituent can enhance the catalytic performance, while electron withdrawing substituents have the opposite effect. However, formanilide, which violates this law, shows the best modification effect, which is proved to be the effect of steric hindrance by characterization and DFT calculation Therefore, another rule is concluded that the electron donor ability and steric hindrance of substituents on amide ligands jointly affect the modification effect. Finally, benzanilide, with a superior modification effect, which searched based on the above results, gives strong evidence for the correction of these rules. This work provides a theor. basis for the search for efficient ligands for acetylene hydrochlorination.

Catalysis Science & Technology published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, SDS of cas: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Stepanidenko, Evgeniia A. published the artcileStrongly luminescent composites based on carbon dots embedded in a nanoporous silicate glass, HPLC of Formula: 123-39-7, the main research area is nanoporous silicate glass carbon dot luminescent composite optical property; carbon dots; composite materials; nanoporous silicate glass; photoluminescence.

Luminescent composites based on entirely non-toxic, environmentally friendly compounds are in high demand for a variety of applications in photonics and optoelectronics. Carbon dots are a recently developed kind of luminescent nanomaterial that is eco-friendly, biocompatible, easy-to-obtain, and inexpensive, with a stable and widely tunable emission. Herein, we introduce luminescent composites based on carbon dots of different chem. compositions and with different functional groups at the surface which were embedded in a nanoporous silicate glass. The structure and optical properties of these composites were comprehensively examined using electron microscopy, Fourier transform IR transmission, UV-Vis absorption, and steady-state and time-resolved photoluminescence. It is shown that the silicate matrix efficiently preserved, and even enhanced the emission of different kinds of carbon dots tested. The photoluminescence quantum yield of the fabricated nanocomposite materials reached 35-40%, which is comparable to or even exceeds the values for carbon dots in solution

Nanomaterials published new progress about Absorption. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Liu, Yang published the artcileInorganic ligands-mediated hole attraction and surface structural reorganization in InP/ZnS QD photocatalysts studied via ultrafast visible and midinfrared spectroscopies, HPLC of Formula: 123-39-7, the main research area is indium zinc phosphide quantum dot photocatalyst midinfrared spectroscopy.

Photoinduced carrier dynamical processes dominate the optical excitation properties of photocatalysts and further determine the photocatalytic performance. In addition, as the electrons generally possess a faster transfer rate than holes, hole transfer and accumulation are critical, and they play the key efficiency-limiting step during the photocatalytic process. Therefore, a comprehensive understanding of the dynamics of photogenerated holes and their determining factors in the photocatalytic system is highly essential to rationalize the full catalytic mechanism and develop highly efficient photocatalysts, which have not yet been revealed. In this work, the photoinduced charge carrier dynamics in InP/ZnS quantum dots (QDs) capped with long-chain L-typed ligands (oleylamine) and inorganic ligands (sulfide ion (S2-)) were explored. Time-resolved photoluminescence and femtosecond transient-absorption spectroscopy unambiguously confirmed the ultrafast hole transfer from the InP core to S2- ligands. Moreover, by probing the bleach of vibrational stretching of the ligands with transient midinfrared absorption spectroscopy, the hole transfer time was determined to be 4.2 ps. The injected holes are long-lived at the S2- ligands (>4.5 ns), and they can remove electrostatically attached surfactants to compensate for the spatial charge redistribution. Finally, compared with other inorganic ligands such as Cl- and PO43-, S2- balances the ionic radii and net charge to ensure the optimal condition for charge transfer. Such observation rationalizes the excellent photocatalytic H2 evolution (213.6μmol mg-1 within 10 h) in InP/ZnS QDs capped with S2- compared with those capped with other ligands and elucidates the role of surface ligands in the photocatalytic activity of colloidal QDs.

Science China Materials published new progress about Absorbents. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics