Tag: M.W=50-100

Li, Xuefei published the artcileGeneralized Colloidal Approach for Preparing Epitaxial 1D/2D Heterostructures, Recommanded Product: N-Methylformamide, the main research area is cadmium selenide zinc sulfide epitaxial heterostructure photocatalytic water splitting.

1D/2D heterostructures, in particular those that consist of a 1D nanorod core and a 2D nanoplate (NPL) shell, enable the combination of the merits and mitigation of the demerits of distinct dimensionalities into one system, providing a new platform to study their intriguing properties. However, there is still lack of effective strategies to rationally integrate the components with different dimensionalities together. Here, we report a general seeded growth method for the construction of epitaxial 1D/2D heterostructures with a variety of compositional combinations, in which ordered 2D NPL arrays are vertically grown along the c-axis of 1D wurtzite nanomaterials, including II-VI and I-III-VI2 semiconductors. The loading densities of NPLs on the 1D nanomaterials are very high, up to 280 piece/μm. The same crystal structure of the grown NPLs and 1D seeds ensures the epitaxial growth relationship between these two materials. It is found that the secondary 2D growth mode is a kinetic-dominated process, in addition to the effect of the anionic sulfur precursor. The as-prepared 1D/2D CdSe/CdS heterostructures exhibit enhanced activity for photocatalytic hydrogen evolution compared to that of the single-component CdSe NRs and CdS/CdS homostructures. This work greatly enriches the variety and architecture of the available heterostructures and also provides a toolbox for exploring their promising applications.

Chemistry of Materials published new progress about Adsorption (isotherm). 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

Yuan, Jinwei published the artcileHighly efficient copper-catalyzed direct C-H amidation of quinoxalin-2(1H)-ones with amidates under microwave irradiation, SDS of cas: 123-39-7, the main research area is quinoxalinone amidate preparation microwave irradiation; amide quinoxalinone amidation copper catalyst.

A novel and highly efficient copper-catalyzed direct oxidative amidation of quinoxalin-2(1H)-ones with a variety of aromatic and aliphatic amides was described. This methodol. provided a practical approach to various 3-acylamino quinoxalin-2(1H)-ones from readily available starting materials in good to excellent yields.

Organic Chemistry Frontiers published new progress about Amidation (oxidative). 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

Mehmood, Arshad published the artcileExtending the Marcus μ-Scale of Solvent Softness Using Conceptual Density Functional Theory and the Orbital Overlap Distance: Method and Application to Ionic Liquids, COA of Formula: C2H5NO, the main research area is ionic liquid solvent softness density functional theory.

Abstract: The chem. hardness of a solvent can play a decisive role in solubility and reactivity in solution Several empirical scales quantifying solvent softness have been proposed. We explore whether computed properties of solvent mols. can reproduce these exptl. scales. Our “”orbital overlap distance”” quantifying the size of orbitals at a mol.’s surface effectively reproduces the Marcus μ-scale of solvent softness. The orbital overlap distance predicts that the surface of chem. hard solvent mols. is dominated by compact orbitals possessing a small orbital overlap distance. In contrast, the surface of chem. soft solvent mols. has a larger contribution from diffuse orbitals and a larger orbital overlap distance. Other conceptual d. functional theory descriptors, including the global hardness and electronegativity, can also reproduce the Marcus scale. We further introduce a “”solvent versatility”” RMSD Dsurf scale quantifying variations in the surface orbital overlap distance. “”Good”” solvents such as DMSO, which combine chem. “”hard”” and “”soft”” sites within a single mol., possess a large RMSD Dsurf. We conclude by applying this approach to predict the Marcus μ-parameters for widely-used ionic liquids and ionic liquid-cosolvent systems.

Journal of Solution Chemistry published new progress about Density functional theory. 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

Arya, Chetan Kumar published the artcileA 2-Tyr-1-carboxylate Mononuclear Iron Center Forms the Active Site of a Paracoccus Dimethylformamidase, Application In Synthesis of 123-39-7, the main research area is dimethylformamidase iron center tyrosine Paracoccus; amide bond hydrolysis; bioremediation; dimethylforamamidase; metalloenzymes; protein structure.

N,N-DMF (DMF) is an extensively used organic solvent but is also a potent pollutant. Certain bacterial species from genera such as Paracoccus, Pseudomonas, and Alcaligenes have evolved to use DMF as a sole carbon and nitrogen source for growth via degradation by a dimethylformamidase (DMFase). We show that DMFase from Paracoccus sp. strain DMF is a halophilic and thermostable enzyme comprising a multimeric complex of the α2β2 or (α2β2)2 type. One of the three domains of the large subunit and the small subunit are hitherto undescribed protein folds of unknown evolutionary origin. The active site consists of a mononuclear iron coordinated by two Tyr side-chain phenolates and one carboxylate from Glu. The Fe3+ ion in the active site catalyzes the hydrolytic cleavage of the amide bond in DMF. Kinetic characterization reveals that the enzyme shows cooperativity between subunits, and mutagenesis and structural data provide clues to the catalytic mechanism.

Angewandte Chemie, International Edition published new progress about Density functional theory. 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

Khachatrian, Artashes A. published the artcileHydrogen bonding of linear and cyclic amides in ionic liquids, Product Details of C2H5NO, the main research area is ionic liquid hydrogen bond enthalpy amide solution.

The present work focuses on hydrogen bonding of linear and cyclic amides (formamide, N-methylformamide, acetamide, N-methylacetamide, N, N-dimethylacetamide, 2-pyrrolidone) in several ionic liquid (1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide [BMIM][NTf2], 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM][BF4], 1-butyl-3-methylimidazolium trifluoromethanesulfonate [BMIM][TfO], 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF6], triethylsulfonium bis(trifluoromethylsulfonyl)imide [Et3S][NTf2], Trimethylpropylammonium bis(trifluoromethylsulfonyl)imide [TMPAm][NTf2]). The solution enthalpies of amides in ionic liquids were measured by solution calorimetry at infinite dilution The hydrogen bond enthalpies were calculated based on solution enthalpies of amides in ionic liquids The hydrogen bond enthalpies of linear and cyclic amides in ionic liquids and organic proton acceptors were compared. The influence of active proton donor center on the formation of hydrogen bond complexes between amides and ionic liquids was analyzed.

Thermochimica Acta published new progress about Hydrogen bonding enthalpy. 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

Wu, Long-Fei published the artcilepH-Dependent peptide bond formation by the selective coupling of α-amino acids in water, Formula: C2H5NO, the main research area is peptide one pot synthesis prebiotic evolution life origin; amino acid peptide alanine coupling prebiotic amine methyl isonitrile; carboxylic acid anhydride intermediate amide bond formation; methyl isonitrile mediated reaction mechanism peptide elongation coupling.

A novel mechanism enabling selective peptide elongation by coupling α-amino acids over other potentially competing prebiotic amines under acidic aqueous condition is suggested. It proceeds via the generation of a carboxylic acid anhydride intermediate with subsequent intramol. formation of the amide bond.

Chemical Communications (Cambridge, United Kingdom) published new progress about Amide group (amide bond). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Formula: C2H5NO.

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

Zhou, Shengchao published the artcileInsights into the Mechanism of Thiol-Triggered COS/H2S Release from N-Dithiasuccinoyl Amines, Synthetic Route of 123-39-7, the main research area is antiinflammatory dithiasuccinoyl amine derivative preparation thiol hydrogen sulfide.

The hydrolysis of carbonyl sulfide (COS) to form H2S by carbonic anhydrase has been demonstrated to be a viable strategy to deliver H2S in a biol. system. Herein, we describe N-dithiasuccinoyl amines as thiol-triggered COS/H2S donors. Notably, thiol species especially GSH and homocysteine can trigger the release of both COS and H2S directly from several specific analogs via an unexpected mechanism. Importantly, two representative analogs Dts-1 and Dts-5 show intracellular H2S release, and Dts-1 imparts potent anti-inflammatory effects in LPS-challenged microglia cells. In conclusion, N-dithiasuccinoyl amine could serve as promising COS/H2S donors for either H2S biol. studies or H2S-based therapeutics development.

Journal of Organic Chemistry published new progress about Anti-inflammatory agents. 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

Laurence, Christian published the artcileHydrogen-Bond Acceptance of Solvents: A 19F Solvatomagnetic β1 Database to Replace Solvatochromic and Solvatovibrational Scales, COA of Formula: C2H5NO, the main research area is solvent hydrogen bond acceptor solvatomagnetic scale database.

A variety of physicochem. properties and several hydrogen-bond donors have been used to define methods and to build scales aiming at measuring the hydrogen-bond acceptance of solvents. There is a great deal of confusion in these scales and methods. Solvatochromic, solvatocalorimetric, solvatovibrational, and 19F solvatomagnetic comparison methods are critically reviewed. Only two methods, the solvatomagnetic and the solvatocalorimetric ones, are able to yield reliable solvent hydrogen-bond acceptance scales. The solvatomagnetic β1 scale defined from the 19F chem. shift of 4-fluorophenol is extended to many solvents including ionic liquids and green solvents. The results for about 240 hydrogen-bond acceptor solvents are organized in a numerical β1 database. The comparison of β1 with solvatochromic scales highlights their shortcomings, in particular for the important class of amphiprotic solvents. Therefore, the use of the 19F solvatomagnetic comparison method and of the solvatomagnetic β1 scale is recommended in solvent effect studies.

Journal of Organic Chemistry published new progress about Basicity (hydrogen-bond). 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

Shendre, Sushant published the artcileUltrahigh-efficiency aqueous flat nanocrystals of CdSe/CdS@Cd1-xZnxS colloidal core/crown@alloyed-shell quantum wells, Quality Control of 123-39-7, the main research area is CdSe CdS CdZnS nanocrystal core crown shell quantum well.

Colloidal semiconductor nanoplatelets (NPLs) are highly promising luminescent materials owing to their exceptionally narrow emission spectra. While high-efficiency NPLs in non-polar organic media can be obtained readily, NPLs in aqueous media suffer from extremely low quantum yields (QYs), which completely undermines their potential, especially in biol. applications. Here, we show high-efficiency water-soluble CdSe/CdS@Cd1-xZnxS core/crown@shell NPLs formed by layer-by-layer grown and composition-tuned gradient Cd1-xZnxS shells on CdSe/CdS core/crown seeds. Such control of shell composition with monolayer precision and effective peripheral crown passivation, together with the compact capping d. of short 3-mercaptopropionic acid ligands, allow for QYs reaching 90% in water, accompanied by a significantly increased photoluminescence lifetime (∼35 ns), indicating the suppression of nonradiative channels in these NPLs. We also demonstrate the controlled attachment of these NPLs without stacking at the nanoscale by taking advantage of their 2D geometry and hydrophilicity. This is a significant step in achieving controlled assemblies and overcoming the stacking process, which otherwise undermines their film formation and performance in optoelectronic applications. Moreover, we show that the parallel orientation of such NPLs achieved by the controlled attachment enables directed emission perpendicular to the surface of the NPL films, which is highly advantageous for light extraction in light-emitting platforms.

Nanoscale published new progress about Colloidal semiconductors. 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

Ao, Xianyu published the artcileEnhanced Fields in Mirror-Backed Low-Index Dielectric Structures, Recommanded Product: N-Methylformamide, the main research area is field mirror backed dielec nanopillar array.

This Letter reports the localization of optical fields in dielec. nanopillar arrays on a metal film. Large-area arrays of tall (>450 nm) polymer pillars were patterned on an optically thick gold film by solvent-assisted nanoscale embossing. This hybrid dielec.-metal system supports two high-quality band-edge modes, with the mode at the wavelength closest to the array spacing concentrating electromagnetic field intensity at the tops of and extending beyond the nanopillars. Organic dye mols. mixed in the polymer matrix of the nanopillars showed enhanced radiative emission rates and narrow-band and unidirectional fluorescence emission. This hybrid platform offers prospects for strong near-field enhancements from low-index dielec. nanostructures.

ACS Photonics published new progress about Electric field (profile). 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