Month: November 2022

Yella Reddy, P. published the artcileAcoustic, volumetric and FTIR study of binary liquid mixtures of 2-methyl cyclohexanone with amides, Synthetic Route of 123-39-7, the main research area is methyl cyclohexanone amide acoustic volumetric FTIR binary liquid mixture.

Densities, speeds of sound, and viscosities at various temperatures were determined for the systems: 2-methylcyclohexanone (2-MCYH) + formamide (F), N-methylformamide (NMF) and N, N-dimethylformamide (DMF). From the exptl. results, Excess molar volume VEm, Excess isentropic compressibility κEs, deviation in viscosity Δη and excess Gibbs energy of activation of viscous flow G*E, Excess partial molar properties at infinite dilution V°Em,1, V°Em,2, K°Es,m,1 and K°Es,m,2 were calculated There is evidence of complex formation between unlike mols. FT-IR properties have been carried out to study the specific interaction, such as the formation of the hydrogen bond between unlike mols. in the binary liquid mixtures, a good agreement is observed among the excess parameters and FT-IR spectroscopic properties.

Journal of Chemical Thermodynamics published new progress about Activation energy. 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

Mackey, Pamela published the artcileStereoselective Installation of Five Contiguous Stereogenic Centers in a Double Aldol-Tishchenko Cascade and Evaluation of the Key Transition State through DFT Calculation, Related Products of amides-buliding-blocks, the main research area is stereoselective double Aldol Tishchenko cascade transition state analysis.

The stereoselective formation of 5 contiguous chiral centers in a single pot reaction is demonstrated using an aldol, aldol-Tishchenko reaction of N-tert-Bu sulfinimines. One diastereoisomer (from 32 possibilities) predominates, and a series of cyclic and acyclic 3-amino-1,5-diol derivatives are synthesized in good yields (up to 80%) and excellent diastereoselectivities (up to >98:2 dr). Investigations support two reversible aldol steps, and multiple intermediates which are funnelled through a remarkably selective, irreversible, Tishchenko reduction, in a Curtin-Hammett phenomenon. DFT calculations using a disolvated (THF) model reveal the factors controlling stereoselectivity in the final irreversible Tishchenko step.

Organic Letters published new progress about Activation energy. 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Related Products of amides-buliding-blocks.

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

Asai, Sohei published the artcileOrganic solvent-based thermo-electrochemical cells with an iron(II/III) triflate redox couple for use in harvesting low-grade waste heat at 100-200°C, HPLC of Formula: 123-39-7, the main research area is iron triflate redox couple organic solvent thermoelectrochem cell.

The need to harvest low-grade waste heat at 100-200°C has attracted much attention. In this paper, the performance of thermo-electrochem. cells (TECs) with an iron triflate (Fe(CF3SO3)2/Fe(CF3SO3)3) redox couple is investigated in various organic solvents at temperatures exceeding 100°C. The TECs in DMF (DMF) showed the maximum Seebeck coefficient of 1.51 mV K-1, and the maximum power d. of 660 mW m-1 was achieved using 0.5 M iron triflate in DMF at ΔT = 120 K (145°C on the hot-side).

Sustainable Energy & Fuels published new progress about Cyclic voltammetry. 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, Xiao-Kuan published the artcileControllable Doping of Transition-Metal Dichalcogenides by Organic Solvents, Quality Control of 123-39-7, the main research area is dimethylsulfoxide molybdenum disulfide doping effect optoelectronic device.

Seeking controllable and efficient surface dopant mols. for transition-metal dichalcogenides (TMDCs) is highly valuable for fully understanding TMDCs properties and their applications to relevant devices. The general doping effect of solvents on TMDCs are explored. By selecting suitable solvents with optimized relevant factors, controllable n-doping of molybdenum disulfide (MoS2) is obtained on the same device with the sheet d. of electrons increased from 2.3 × 1011 to 6.4 × 1012, 9.7 × 1012, and 1.6 × 1013 by use of dimethylsulfoxide, N,N-dimethylformamide, and N-methyl-pyrrolidone (NMP), resp. The doping principle is explained by charge-donating characteristics of mol. and dipole interaction. After doping by NMP, the contact resistance is reduced by four times, and the on/off current ratio of fabricated top-gated MoS2 transistors is increased by 3 orders of magnitude. This work can guide the selection of suitable solvents for effective doping of two-dimensional materials and advance the development of precise controllable electronic and optoelectronic devices.

Advanced Electronic Materials published new progress about Contact resistance. 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

Srivastava, Ravi Kumar published the artcileQuantum chemical descriptors based QSAR study on inhibitors of enzyme alcohol dehydrogenase, Quality Control of 359-38-6, the main research area is QSAR alc dehydrogenase inhibitor amide pyrazole quantum chem descriptor.

Descriptors, heat of formation, energy of HOMO, total energy, absolute hardness, global hardness and chem. potential in different combinations, have been used to develop QSAR models of inhibitors of enzyme alc. dehydrogenase. The inhibitors are mainly derivatives of amides and pyrazoles, which are divided into two different sets. One QSAR model having the best predictive power is presented in each set. The correlation coefficient value is above 0.8 in first and above 0.9 in second set. The best combination of descriptors are heat of formation, total energy along with any two of the descriptors viz. energy of HOMO, chem. potential and global hardness.

Organic Chemistry: An Indian Journal published new progress about Chemical potential. 359-38-6 belongs to class amides-buliding-blocks, name is 2,2-Difluoroacetamide, and the molecular formula is C2H3F2NO, Quality Control of 359-38-6.

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

Kato, Yuki published the artcileEvaluation of the Antifoaming Effect Using Hansen Solubility Parameters, Recommanded Product: N-Methylformamide, the main research area is antifoaming Hansen solubility surfactant defoaming.

The appearance of foam in various industrial processes can cause challenges. Antifoaming agents are widely added to suppress foam. To exert a defoaming effect, affinity between the main foam-generating component and the antifoaming agent is an important criterion for selection of an antifoaming agent. The Hansen solubility parameter (HSP) can be used as an index to show the affinity between substances more quant., simply, and accurately. The Hansen solubility sphere method was used to measure the HSPs of antifoaming agents and a foam-forming surfactant. Various antifoaming agents were added to a surfactant solution, and the defoaming effect was evaluated. Correlations of 0.953-0.860 confirmed a relationship between affinity of the antifoaming agents for the surfactant based on HSP theory and the defoaming effect. It is suggested that use of HSP as an indicator can facilitate selection of the most suitable antifoaming agent for the process.

ACS Omega published new progress about Antifoaming agents. 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

Li, Hu published the artcileN-formyl-stabilizing quasi-catalytic species afford rapid and selective solvent-free amination of biomass-derived feedstocks, Product Details of C2H5NO, the main research area is carbonyl compound formamide formic acid microwave irradiation reductive amination; amine green preparation.

A protocol was developed that showed in-situ formed N-formyl quasi-catalytic species afforded highly selective synthesis of formamides or amines with controllable levels from a variety of aldehyde- and ketone-derived platform chem. substrates under solvent-free conditions. Up to 99% yields of mono-substituted formamides were obtained in 3 min. The C-N bond formation and N-formyl species were prevalent in the cascade reaction sequence. Kinetic and isotope labeling experiments explicitly demonstrated that the C-N bond was activated for subsequent hydrogenation, in which formic acid acted as acid catalyst, hydrogen donor and as N-formyl species source that stabilized amine intermediates elucidated with d. functional theory. The protocol provided access to imides from aldehydes, ketones, carboxylic acids and mixed-substrates, requires no special catalysts, solvents or techniques and provided new avenues for amination chem.

Nature Communications published new progress about Amination kinetics. 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

Ho, Steven Sai Hang published the artcileSeasonal behavior of water-soluble organic nitrogen in fine particulate matter (PM2.5) at urban coastal environments in Hong Kong, Category: amides-buliding-blocks, the main research area is particulate mater water soluble organic nitrogen seasonal variation.

Water-soluble organic nitrogen (WSON) in fine particulate matter (PM2.5) was determined at urban coastal environments in China based on 1-yr measurement. The WSON concentrations were in a range of 14.3-257.6 nmol N m-3 and accounted for 22.0-61.2% of the water-soluble nitrogen (WSN) in composition The average total concentration of free amino acid (FAA) was 1264.5 ± 393.0 pmol m-3, which was lower than those in continental urban cities but nevertheless comparable to the rural area of Pearl River Delta (PRD) in China. The total quantified amines and amino compounds ranged from 223.8 to 806.0 pmol m-3 in which methylamine, ethylamine, and ethanolamine were the most abundant compounds The average concentration of urea was 7.8 ± 3.0 nmol m-3 and at least one order of magnitude higher than those in marine and rural areas but comparable to other continental cities in China during non-dust period. Summer showed the highest average concentration of WSON (95.0 ± 66.6 nmol N m-3) and composition in WSN (49.3%) compared to other seasons (27.9-37.0%). The results were consistent with previous findings that the inorganics can contribute more than the organics in secondary aerosol formation. There were no distinctive seasonal variations of organic compositions of FAA, amine and amino compounds, and urea. This observation was possibly attributed to a mix of original sources in urban and different prevailing wind directions. Fair correlations (r < 0.4) between WSON compounds and atm. oxidants [ozone (O3) and nitrogen oxides (NOx)] suggest that biogenic oxidation is possibly not a major contributing factor in atm. coastal urban location. Air Quality, Atmosphere & Health published new progress about Airborne particles. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Category: amides-buliding-blocks.

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

Stone, Sarah published the artcilePulse-exposure toxicity of ammonia and propoxur to the tropical copepod Acartia sinjiensis, Recommanded Product: N-Methylformamide, the main research area is Acartia ammonia toxicity risk assessment; Crustacean; Episodic; Intermittent; Marine; Time-averaged concentration.

Toxicity risk assessments of short-term discharges of contaminated waters to the aquatic environment have shown that receptor organisms can tolerate higher pulse-exposure than continuous-exposure concentrations of some contaminants. However, these observations are influenced by the mode of toxicity of the contaminants present and the concentration-time profile of the exposure. For common metal contaminants, the time-weighted average concentration (TAC) of the exposure has been useful for predicting risk of toxicity to multiple species, including the tropical, euryhaline copepod Acartia sinjiensis. To increase our understanding of the application and limitations of the TAC approach, the present study examined how varied pulse-exposure durations affect the toxicity of fast-acting contaminants, ammonia, and the common pesticide propoxur to this copepod species. Copepod larvae were exposed under continuous-exposure conditions (all life stages from eggs to nauplii to copepodites exposed) and as 6- and 18-h pulse exposures applied during the most sensitive life stage only (24-h-old nauplii) within 78-h tests. Larval development ratio and population size were assessed as test endpoints. Generally, increased exposure duration resulted in increased toxicity. Trends observed for ammonia and propoxur were slightly different for larval development and population size. Larvae tolerated greater concentrations of contaminants in a 6-h pulse (higher 10% effect concentration) than in an 18-h pulse, or a continuous 78-h exposure, whereas toxicity responses converged for the 18- and 78-h exposures. Continuous toxicity thresholds were always protective of pulse exposures, providing a conservative toxicity threshold for all durations of pulse exposures. Although generalizations for predictions of risk based on TACs are frequently effective for common metal contaminants, the TAC approach was not effective for ammonia and propoxur. Environ Toxicol Chem 2021;00:1-11. 2021 SETAC.

Environmental Toxicology and Chemistry published new progress about Acartia sinjiensis. 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

Exner, Jessica published the artcileElectronic effects in profluorescent benzotriazinyl radicals: a combined experimental and theoretical study, HPLC of Formula: 7465-88-5, the main research area is profluorescent benzotriazinyl radical preparation styryl trapping product; absorption photoluminescence EPR g factor quantum chem calculation.

The synthesis, photophys. characterization, and quantum chem. calculations of a series of benzotriazinyl radicals I (R1, R2, R3 = H, OMe, CN) and their styryl radical trapping products II are presented. The benzotriazinyl radicals are non-luminescent but surprisingly the corresponding styryl radical trapping products exhibit high fluorescence quantum yields (up to 60% in some cases), making them highly valuable probes or labels. Addnl., the influence of the substitution pattern on the optical properties of the radical trapping products was observed exptl. and interpreted by means of quantum chem. calculations Specific substitution patterns showed a bathochromic shift compared to the unsubstituted compound Computationally, it was shown that this substitution pattern leads to a stronger energetic stabilization of the LUMO than the HOMO. Anal. of the influence of the substitution pattern on the optical properties showed a bathochromic shift in several examples, which was interpreted by means of quantum chem. calculations

Physical Chemistry Chemical Physics published new progress about Absorption spectra. 7465-88-5 belongs to class amides-buliding-blocks, name is 4-Methoxy-N-phenylbenzamide, and the molecular formula is C14H13NO2, HPLC of Formula: 7465-88-5.

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