Tag: M.W=50-100

Biswas, Sohag published the artcileAqueous hydroxyl group as the vibrational probe to access the hydrophobicity of amide derivatives, Formula: C2H5NO, the main research area is methylformamide water solvation mol rotation hydrogen bond vibrational spectra.

First principles mol. dynamics (FPMD) simulations of relatively dilute aqueous solutions of N-methylformamide (NMF), N, N-dimethylacetamide (DMA), N-methylacetamide (NMA) were carried out to elucidate the effects of variation of hydrophobicity of amide mols. on structure, dynamics and spectral properties of solvating water mols. A quant. anal. of dangling OH groups of water mols., one of the consequences of hydrophobicity, around the amide mols. was performed to explore the structure of surrounding water mols. We observe that DMA has the most hydrophobic character among the three amide mols.; the lifetime of dangling OH mode of water mols. and the number of such modes are found to be more inside the solvation shell of DMA as compared to NMA and NMF mols. Overall this lifetime is more inside the solvation shell of amides compared to the bulk water mols. for all aqueous solutions of amides. Rotational dynamics calculation suggests significant retardation of OH bonds of water near the amide oxygen atom (O) due to the Ow-Hw···O strong hydrogen bonds. A moderate slowdown of reorientational dynamics is also observed for OH modes that are close to the hydrophobic surface of DMA in its aqueous solution Vibrational d. of states (VDOS) and frequency distribution calculations point out the higher average stretching frequency (∼3600-3850 cm-1) of free OH groups. Hydrogen bond lifetime calculations conceive that DMA, having three Me groups, makes stronger hydrogen bonds through the C=O moiety. Vibrational spectral diffusion of bulk water and solvation shell water mols. were also calculated in combination with wavelet transform and frequency-frequency autocorrelation functions. The C=O group affected OH stretching frequency bands for aqueous solutions of NMF and NMA mols. are more pronounced than that of DMA. However, N-H affected OH frequency bands are less pronounced for NMA and DMA due to the presence of more number of hydrophobic Me groups. Going from NMF to DMA, the OH frequency bands inside the amide solvation shells shift towards the higher value due to the enhancement of hydrophobicity. The vibrational spectral diffusion of OH modes around C=O and N-H (N for DMA) groups, as well as for bulk water mols., is also investigated. Three time scales were found for these calculations for all the cases. The fast time scales in the range ∼50-100 fs are due to the amide-water intact hydrogen bonding, and two slower time scales in the range ∼0.6-3.90 ps and ∼10-20 ps were found. The time scales in the range of ∼0.6 to 3.90 ps can be attributed to carbonyl-water and N-H-water hydrogen bonding, and the very long time scales are due to the escape dynamics water mols. from the solvation shell of C=O and N-H (N for DMA) groups.

Journal of Molecular Liquids published new progress about Bond length. 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

Dirin, Dmitry N. published the artcileMicrocarrier-Assisted Inorganic Shelling of Lead Halide Perovskite Nanocrystals, Formula: C2H5NO, the main research area is microcarrier assisted shelling lead halide perovskite nanocrystal; core/shell; lead halide perovskite; luminescence; nanocrystals; stability.

The conventional strategy of synthetic colloidal chem. for bright and stable quantum dots has been the production of epitaxially matched core/shell heterostructures to mitigate the presence of deep trap states. This mindset has been shown to be incompatible with lead halide perovskite nanocrystals (LHP NCs) due to their dynamic surface and low m.p. Nevertheless, enhancements to their chem. stability are still in great demand for the deployment of LHP NCs in light-emitting devices. Rather than contend with their attributes, we propose a method in which we can utilize their dynamic, ionic lattice and uniquely defect-tolerant band structure to prepare non-epitaxial salt-shelled heterostructures that are able to stabilize these materials against their environment, while maintaining their excellent optical properties and increasing scattering to improve out-coupling efficiency. To do so, anchored LHP NCs are first synthesized through the heterogeneous nucleation of LHPs onto the surface of microcrystalline carriers, such as alkali halides. This first step stabilizes the LHP NCs against further merging, and this allows them to be coated with an addnl. inorganic shell through the surface-mediated reaction of amphiphilic Na and Br precursors in apolar media. These inorganically shelled NC@carrier composites offer significantly improved chem. stability toward polar organic solvents, such as γ-butyrolactone, acetonitrile, N-methylpyrrolidone, and trimethylamine, demonstrate high thermal stability with photoluminescence intensity reversibly dropping by no more than 40% at temperatures up to 120 °C, and improve compatibility with various UV-curable resins. This mindset for LHP NCs creates opportunities for their successful integration into next-generation light-emitting devices.

ACS Nano published new progress about Band structure. 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

Zhang, Qing published the artcileAltering microbial communities: A possible way of lactic acid bacteria inoculants changing smell of silage, Quality Control of 123-39-7, the main research area is lactic acid bacteria stylo rice straw silage.

Silage is traditionally and globally used as an important feed source for ruminants. The smell of silage affects not only feed intake of animals but also the milk flavor and quality. Stylo and rice straw were ensiled with or without a Lactobacillus plantarum strain (LP) for 30 days. Microbial communities were detected by Illumina HiSeq sequencing method and volatile chems. for the smell features were also analyzed using a metabolomics approach. The addition of LP decreased (P < 0.05) weight loss, pH, ammonia-N content, butyric acid content and increased (P < 0.05) lactic acid content of the two silages. Totally, 117 volatile chems. were identified in the two silages, including 45 esters, 16 terpenes, 12 aromatics, 10 alc., 9 alkanes, 8 heterocyclic compounds, 7 ketones, 4 aldehydes, 3 acids, 2 amines and 1 phenol. In stylo silage, 13 chems. including 1-(2-hydroxy-5-methylphenyl)-ethanone, 1-hexanol, tetradecanoic acid, Et ester, vinyl trans-cinnamate, 3-methyl-1-butanol, Bu caprate, Bu benzoate, N-methyl-formamide, 3-phenylpropanol, phenylethyl alc., butanoic acid, Bu ester, propanoic acid, Et ester and 3-(1-methylethyl)-oxetane were downregulated by LP. In rice straw silage, 6 volatile chems. including propanoic acid, Bu ester, propanoic acid, hexyl ester, 1-(2-hydroxy-5-methylphenyl)-ethanone, (4-methoxyphenyl)-hydrazine, 4-ethyl-2-methoxy-phenol and 1-(2,4-dihydroxyphenyl)-ethanone were downregulated by LP. Almost all these chems. were pos. correlated (P < 0.05) with the relative abundance of Kosakonia, Enterobacter, Lachnoclostridium and Nigrospora, and were neg. correlated (P < 0.05) with the relative abundance of Lactobacillus, Methylobacterium, Sphingomonas. In conclusion, microbiota has influence on volatile metabolites of silages. Lactic acid bacteria inoculants could alter the smell by changing microbial communities of the silage. This study provides a new insight into intrinsic characteristics related to smell of silages and a potential way to change. Animal Feed Science and Technology published new progress about Aldehydes Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 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

Metzger, Eric D. published the artcileHighly Selective Heterogeneous Ethylene Dimerization with a Scalable and Chemically Robust MOF Catalyst, Computed Properties of 123-39-7, the main research area is ethylene dimerization scalable robust MOF catalyst.

Metal-organic frameworks (MOFs) hold great promise as structurally tunable catalysts capable of high selectivity in the solid state, yet their comparatively high cost and often limited stability remain significant concerns for their commercialization as heterogeneous catalysts. Here, we report detailed X-ray absorption spectroscopy studies of Co- and Ni-MFU-4l, a class of highly selective MOF catalysts for olefin upgrading, and reveal mechanisms that lead to their deactivation. We further show that Ni-CFA-1, a more scalable and economical alternative to Ni-MFU-4l, reproduces both the local coordination structure and the high selectivity of the latter in ethylene dimerization catalysis. Under optimal conditions, Ni-CFA-1 activated by MMAO-12 achieves a turnover frequency of 37100 per h and a selectivity of 87.1% for 1-butene, a combination of activity, selectivity, and affordability that is unmatched among heterogeneous ethylene dimerization catalysts. Ni-CFA-1 retains its high activity for at least 12 h in a one-liter semibatch reactor, offering a strategy toward robust and scalable MOFs for industrial catalysis.

ACS Sustainable Chemistry & Engineering published new progress about Alkenes, C4 Role: BYP (Byproduct), IMF (Industrial Manufacture), PREP (Preparation). 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

Protesescu, Loredana published the artcileColloidal nano-MOFs nucleate and stabilize ultra-small quantum dots of lead bromide perovskites, Recommanded Product: N-Methylformamide, the main research area is lead bromide perovskites nanoparticle metal organic framework quantum dot.

The development of synthetic routes to access stable, ultra-small (i.e. <5 nm) lead halide perovskite (LHP) quantum dots (QDs) is of fundamental and technol. interest. The considerable challenges include the high solubility of the ionic LHPs in polar solvents and aggregation to form larger particles. Here, we demonstrate a simple and effective host-guest strategy for preparing ultra-small lead bromide perovskite QDs through the use of nano-sized MOFs that function as nucleating and host sites. Cr3O(OH)(H2O)2(terephthalate)3 (Cr-MIL-101), made of large mesopore-sized pseudo-spherical cages, allows fast and efficient diffusion of perovskite precursors within its pores, and promotes the formation of stable, ∼3 nm-wide lead bromide perovskite QDs. CsPbBr3, MAPbBr3 (MA+ = methylammonium), and (FA)PbBr3 (FA+ = formamidinium) QDs exhibit significantly blue-shifted emission maxima at 440 nm, 446 nm, and 450 nm, resp., as expected for strongly confined perovskite QDs. Optical characterization and composite modeling confirm that the APbBr3 (A = Cs, MA, FA) QDs owe their stability within the MIL-101 nanocrystals to both short- and long-range interfacial interactions with the MOF pore walls. Chemical Science published new progress about Carboxylic acids Role: TEM (Technical or Engineered Material Use), USES (Uses). 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

Sanabria, Marialy Nieves published the artcileMicrowave Irradiation and Formamide: A Perfect Match for Ultrafast Carbamoylation via Radical Reactions, Synthetic Route of 123-39-7, the main research area is acryloyl benzamide formamide iron carbamoylation microwave irradiation green chem; dioxo isoquinolinyl acetamide preparation regioselective.

The exploitation of microwave irradiation in radical reactions, in which formamide was used as both the solvent and reagent, enabled the development of an ultrafast methodol. for amidation via carbamoyl radicals. The synthesis of functionalized isoquinoline-1,3-diones in only 10 s was described for the first time. A very efficient and environmentally benign methodol. was developed. Mild conditions, very short reaction time, low energy consumption, high atom economy, use of an inexpensive and green catalyst, nonanhydrous conditions, high selectivity, and nontoxic solvents are some advantages of this method. The low value of the E factor (6.1) reflects the low waste generation, making this method very attractive for industrial applications.

ACS Sustainable Chemistry & Engineering published new progress about Benzamides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Liu, Ziwei published the artcileHarnessing chemical energy for the activation and joining of prebiotic building blocks, Recommanded Product: N-Methylformamide, the main research area is nucleoside phosphate carboxylic acid catalysis dicyanoimidazole isonitrile energy ATP; prebiotic mol evolution life origin nucleoside phosphate peptide RNA; nucleotide condensation amino acid primordial phospholipid lipid.

Life is an out-of-equilibrium system sustained by a continuous supply of energy. In extant biol., the generation of the primary energy currency, ATP and its use in the synthesis of biomols. require enzymes. Before their emergence, alternative energy sources, perhaps assisted by simple catalysts, must have mediated the activation of carboxylates and phosphates for condensation reactions. Here, we show that the chem. energy inherent to isonitriles can be harnessed to activate nucleoside phosphates and carboxylic acids through catalysis by acid and 4,5-dicyanoimidazole under mild aqueous conditions. Simultaneous activation of carboxylates and phosphates provides multiple pathways for the generation of reactive intermediates, including mixed carboxylic acid-phosphoric acid anhydrides, for the synthesis of peptidyl-RNAs, peptides, RNA oligomers and primordial phospholipids. Our results indicate that unified prebiotic activation chem. could have enabled the joining of building blocks in aqueous solution from a common pool and enabled the progression of a system towards higher complexity, foreshadowing today’s encapsulated peptide-nucleic acid system.

Nature Chemistry published new progress about Carboxylic acids Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

He, Shoushou published the artcileSite-Selective Surface Modification of 2D Superatomic Re6Se8, Computed Properties of 123-39-7, the main research area is superatomic rhenium selenide cluster nanosheet preparation surface functionalization.

Coating two-dimensional (2D) materials with mols. bearing tunable properties imparts their surfaces with functionalities for applications in sensing, nanoelectronics, nanofabrication, and electrochem. Here, the authors report a method for site-selective surface functionalization of 2-dimensional superat. Re6Se8Cl2 monolayers. First, the authors activate bulk layered Re6Se8Cl2 by intercalating Li and then exfoliate the intercalation compound Li2Re6Se8Cl2 in N-methylformamide (NMF). Heating the resulting solution eliminates LiCl to produce monolayer Re6Se8(NMF)2-x (x �0.4) as high-quality nanosheets. The unpaired electrons on each cluster in Re6Se8(NMF)2-x enable covalent surface functionalization through radical-based chem. The authors demonstrate this with four previously unknown surface-functionalized 2-dimensional superat. materials: Re6Se8I2, Re6Se8(SPh)2, Re6Se8(SPhNH2)2, and Re6Se8(SC16H33)2. TEM, chem. anal., and vibrational spectroscopy reveal that the in-plane structure of the 2-dimensional Re6Se8 material is preserved through surface functionalization. The incoming groups control the d. of vacancy defects and the solubility of the 2-dimensional material. This approach will find utility in installing a broad array of chem. functionality on the surface of 2-dimensional superat. materials as a means to systematically tune their phys. properties, chem. reactivity, and solution processability.

Journal of the American Chemical Society published new progress about Monolayers. 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

Kharaneko, A. O. published the artcileHeterocyclizations of Di- and Tricarbonyl Indole Derivatives. Synthesis of β-Carbolines, 3H-[1,2,5]Triazepino[5,4-a]indol-4(5H)-one, and 5,10-Dihydro[1,2]diazepino[4,5-b]indol-4(3H)-one, Name: N-Methylformamide, the main research area is carboline triazepinoindolone dihydrodiazepinoindolone preparation.

A synthetic approach to β-carbolines has been proposed on the basis of heterocyclization of Et 2-(2-benzoyl-1H-indol-3-yl)acetate with N-methylformamide or ammonium acetate. Hydrazine hydrate proved to be inefficient in this reaction. The heterocyclization of di-Me 2,2′-(2-benzoyl-1H-indole-1,3-diyl)diacetate with ammonium acetate selectively afforded 2-(3-hydroxy-1-phenyl-9H-pyrido[3,4-b]indol-9-yl)acetamide. Treatment of di-Me 2,2-(2-benzoyl-1H-indole-1,3-diyl)diacetate with hydrazine hydrate, followed by acid-catalyzed heterocyclization, gave Me 2-(4-oxo-1-phenyl-4,5-dihydro-3H-[1,2,5]triazepino[5,4-a]indol-11-yl)acetate or 2-{4-oxo-1-phenyl-4,5-dihydro[1,2]diazepino[4,5-b]indol-10(3H)-yl}acetohydrazide, depending on the conditions.

Russian Journal of Organic Chemistry published new progress about Fused heterocyclic compounds Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Rayala, Nagamani published the artcileAcid catalyzed multicomponent one-pot synthesis of new quinazolinone based unsymmetrical C-N linked bis heterocycles, Recommanded Product: N-Methylformamide, the main research area is dihydroquinazolinyl hexahydroacridine dione preparation; aminoquinazolinone cyclohexanedione aldehyde multicomponent condensation cyclization hydrochloric acid catalyst.

A novel series of unsym. C-N linked bis heterocycles bearing quinazolinone and acridinedione skeletons I (R = Ph, thiophen-2-yl, 2-chloroquinolin-3-yl, etc.) have been synthesized in an acid promoted one pot multicomponent reaction. A blend of 6-aminoquinazolin-4-(3H)-one, aromatic aldehydes RCHO and cyclohexane-1,3-dione in a simple and efficient condensation-cyclization reaction using hydrochloric acid in catalytic amount as catalyst afforded unsym. bis hybrids in good to excellent yields. Multiheterocyclic hybrid compounds I were also synthesized using heterocyclic ring containing aldehyde in three component reaction. The synthesized quinazolinone-acridindione hybrids I were characterized using spectroscopic techniques.

Asian Journal of Chemistry published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 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