Tag: M.W=50-100

Zou, Luyao published the artcileWindow function for chirped pulse spectroscopy with enhanced signal-to-noise ratio and lineshape correction, Quality Control of 123-39-7, the main research area is window function noise ratio lineshape correction.

In chirped pulse experiments, magnitude Fourier transform is used to generate frequency domain spectra. The application of window function as a tool for lineshape correction and signal-to-noise ratio (SnR) enhancement is rarely discussed in chirped spectroscopy, with the only exception of using Kaiser-Bessel window and trivial rectangular window. We present a specific window function, called “”Voigt-1D”” window, designed for chirped pulse spectroscopy. The window function corrects the magnitude Fourier-transform spectra to Voigt lineshape, and offers wide tunability to control the SnR and lineshape of the final spectral lines. We derived the math. properties of the window function, and evaluated the performance of the window function in comparison to the Kaiser-Bessel window on exptl. and simulated data sets. Our result shows that, compared with un-windowed spectra, the Voigt-1D window is able to produce 100% SnR enhancement on average

Journal of Quantitative Spectroscopy & Radiative Transfer published new progress about Flexibility. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Quality Control of 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

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

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

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

Zhu, Ling published the artcileStructure-Dependent Fenton Reactivity and Degradation Pathway of Methylimidazolium Ionic Liquids, Application In Synthesis of 123-39-7, the main research area is methylimidazolium ionic liquid fenton reactivity degradation pathway.

Short-chain imidazolium-based ionic liquids (IBILs) substituted by Me groups are highly water-soluble and have the potential risk of entering the water environment with wastewater. In this work, the structure-dependent Fenton reactivity and degradation pathway of methylimidazolium ionic liquids were investigated, including the influence of the proton activity and structural symmetry of IBILs. The chem. reactivity of specific sites (atoms) was quant. predicted by a condensed Fukui function (fA-). Aprotic IBILs ([DMIM][BF4] and [TMIM][BF4]) were more resistant to the •OH attacks than protic IBILs ([HHIM][BF4] and [HMIM][BF4]) because deprotonation reduced the fA- value of the attack sites. Structural symmetry increased the initial rate of the total organic carbon (TOC) reduction (k0,TOC) due to the existence of sym. Fenton reaction sites. Trimethyl-substituted [TMIM][BF4] showed the lowest TOC removal efficiency and k0,TOC presumably because the C2-Me substitution greatly weakened the fA- value of C2. The plausible mineralization pathways were proposed on the basis of gas chromatog. coupled with mass spectrometry analyses. The more Me substitution resulted in weaker Fenton reactivity but more oxidation pathways. For [TMIM][BF4], C2-Me reduced the Fenton reactivity of the imidazolium skeleton but increased the oxidation opportunities of dual N-methyls. The Fenton reactivity of methylimidazolium ionic liquids (ILs) is regulated by the proton activity and structural symmetry of ILs.

ACS ES&T Water published new progress about Decomposition. 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

Kumar, T. N. V. Ganesh published the artcileStudy of dolutegravir degradation and spectroscopic identification of products by LCMS, 1H and 13C NMR Techniques, Safety of N-Methylformamide, the main research area is dolutegravir degradation product spectroscopy NMR LC MS.

Stability study for dolutegravir bulk drug was performed and the degradation products formed were identified by chromatog. (HPLC, LCMS) and spectroscopy (ESI-MS, FTIR, 1H and 13C NMR) techniques. Degradation of the drug in acidic and peroxide environment yielded one common major degradant f ((2,4-difluorophenyl) methanamine) with a mass peak at m/z = 182.44. In addition to this, five more minor degradation products (a, b, c, d and e) were formed. The structure interpretation showed that the drug degraded to its synthetic precursor and no extra structures were formed. Hence, it was suggested that drug dolutegravir should be kept away from acidic and oxygen rich conditions.

Pharmaceutical Chemistry Journal published new progress about Decomposition. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Safety of N-Methylformamide.

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

Langone, Deanna published the artcileImpurity profiling of methamphetamine synthesised from α-phenylacetoacetonitrile (APAAN), Safety of N-Methylformamide, the main research area is phenylacetoacetonitrile methamphetamine impurity profiling; APAAN; impurity profiling; methamphetamine.

The rise in popularity of ′designer′ precursor compounds for the synthesis of amphetamine-type stimulants poses a significant challenge to law enforcement agencies. One such precursor is α-phenylacetoacetonitrile (APAAN). APAAN emerged in Europe in 2010 and quickly became one of the most popular precursors for amphetamine synthesis in that region. Previous literature has identified four APAAN-specific impurities formed in the synthesis of amphetamine; however, there is currently no research on the use of APAAN in the synthesis of methamphetamine, which is more likely to be employed in a non-European market. In this study methamphetamine was synthesized via three common clandestine methods: the Leuckart method and two reductive amination methods. We report the identification of five new impurities and two previously identified impurities characteristic for the use of APAAN in the synthesis of methamphetamine. The newly identified impurities were characterised by MS and NMR and determined to be (E)-3-(methylamino)-2-phenylbut-2-enenitrile, 3-(methylamino)-2-phenylbutanenitrile, 3-methyl-2,4-diphenylpentanedinitrile, 2-phenylbutyronitrile and 3-hydroxy-2-phenylbutanenitrile.

Drug Testing and Analysis published new progress about Diastereomers. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Safety of N-Methylformamide.

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

Baba, Mariko published the artcileCloning of the cytochrome P450 enzyme from Perilla frutescens involved in nothoapiole biosynthesis, Application In Synthesis of 123-39-7, the main research area is Perilla nothoapiole cytochrome P450; Biosynthetic pathway; Cytochrome P450; Molecular cloning; Perilla; Phenylpropanoid; Volatile compound.

Phenylpropanoid volatile components are found in various plants and are useful in medicines, health foods, and fragrances. While the pharmacol. actions and toxicities of these compounds have been investigated, there are few reports of the cloning of genes that encode biosynthetic enzymes involved in substituent formation at diverse positions and numbers Previously, using the expressed sequence tag (EST) libraries of pure perilla strains that have been maintained for over 30 years for their oil type, we characterized the P 450 enzyme that produces an intermediate for dillapiole by adding a hydroxy group to myristicin. In this study, we selected a P 450 enzyme involved in nothoapiole biosynthesis from the EST library. Heterologous expression of this enzyme in yeast showed that it is a hydroxylase that synthesizes an intermediate to produce nothoapiole from apiole and dillapiole. The enzyme has high amino acid sequence similarity with a previously cloned enzyme and is categorized into the CYP71D subfamily. Furthermore, we investigated the presence or absence of essential oil components and intermediates believed to be involved in nothoapiole biosynthesis by component anal. of perilla essential oil using GC-MS to help elucidate the biosynthetic pathway of nothoapiole. Only a small number of plant species contain nothoapiole as their principal component and thus few studies have reported the biosynthetic genes involved or the drug efficacy and toxicity of nothoapiole. The present study will aid in understanding the biosynthesis of phenylpropanoid volatile compounds, thereby contributing to further research on potentially useful compounds such as nothoapiole.

Journal of Natural Medicines published new progress about Drug toxicity. 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

Matsunaga, Hiroki published the artcileThermal behavior of ammonium dinitramide and amine nitrate mixtures, Product Details of C2H5NO, the main research area is ammonium dinitramide amine nitrate thermal decomposition review.

This paper focuses on the thermal behavior of mixtures of ammonium dinitramide (ADN) and amine nitrates. Because some mixtures of ADN and amine nitrate exhibit low m.ps. and high-energy content, they represent potential liquid propellants for spacecraft. This study focused on the melting behavior and thermal-decomposition mechanisms in the condensed phase of ADN/amine nitrate mixtures during heating. We measured the m.p. and exothermal behavior during constant-rate heating using differential scanning calorimetry and performed thermogravimetry-DTA-mass spectrometry (TG-DTA-MS) to analyze the thermal behavior and evolved gases of ADN/amine nitrate mixtures during simultaneous heating to investigate their reaction mechanisms. Results showed that the m.p. of ADN was significantly lowered upon the addition of amine nitrate with relatively low mol. volume and low m.p. TG-DTA-MS results showed that the onset temperature of the thermal decomposition of ADN/amine nitrates was similar to that of pure ADN. Furthermore, during thermal decomposition in the condensed phase, ADN produced highly acidic products that promoted exothermic reactions, and we observed the nitration and nitrosation of amines from the dissociation of amine nitrates.

Journal of Thermal Analysis and Calorimetry published new progress about Melting point. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Product Details of C2H5NO.

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