Tag: M.W=50-100

Ding, Hongliang published the artcileHighly flame retardant, low thermally conducting, and hydrophobic phytic acid-guanazole-cellulose nanofiber composite foams, Related Products of isoquinoline, the main research area is phytic acid guanazole cellulose nanofiber composite foam.

Cellulose as a bio-based material has attracted increasing attention due to its excellent properties. However, cellulose is very flammable and it is necessary to impart flame retardancy to cellulose nanofiber (CNF) foams. In this work, phytic acid (PA)-guanazole (GZ)-CNF composite foams were prepared by a simple freeze-drying method. SEM images indicated that the resultant PA-GZ-CNF composite foams exhibited a hierarchical porous structure. Moreover, the introduction of PA and GZ slightly affected the thermal conducting property of CNF foams. PA-GZ-CNF composite foams possessed excellent flame retardancy with a much higher LOI value and a UL-94 V-0 rating compared to that of pure CNF foams. Moreover, the peak of the heat release rate of PA-GZ-CNF composite foams exhibited a significant decrease from 57.80 to 29.27 kW/m2 and the total heat release declined from 2.10 to 1.21 MJ/m2. PA-GZ-CNF composite foams formed a protective char layer covered on the surface, which produced less thermal decomposition volatiles and prevented the spread of pyrolysis products into the gas phase. Addnl., PA-GZ-CNF composite foams achieved hydrophobicity with a water contact angle of 104.0° after hydrophobic treatment without sacrificing their flame retardancy.

Cellulose (Dordrecht, Netherlands) published new progress about Absorption. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bian, Jianqing published the artcileN-doped graphitized porous carbon derived from N-rich polymer for improved supercapacitor performance, Safety of 3,5-Diamino-1,2,4-triazole, the main research area is potassium ferrate nitrogen doped graphitized porous carbon energy storage.

Porous carbons with the large sp. surface area, high elec. conductivity as well as abundant heteroatom doping are regarded as a promising candidate for supercapacitor applications. In this report, a facile potassium ferrate (K2FeO4) activation strategy is adopted to transform the N-rich Schiff-based polymer into N-doped graphitized porous carbons (NGPCs) by the synchronous activation and graphitization. The optimized NGPC-700-1 sample delivers a delightful capacitance of 322.7 F g-1 at 0.5 A g-1 and an excellent rate capability (79.1% capacitance retained at 50 A g-1) in 6 M KOH due to the unique laminated and porous structure with the large surface area (2123.7 m2 g-1), high porous volume (1.30 cm3 g-1) and abundant N/O dopant (6.20/8.20 at%). Moreover, the assembled sym. supercapacitor achieves a high energy d. of 21.5 W h kg-1 at the power supply of 445.5 W kg-1 in 1 M Na2SO4 electrolyte. Therefore, NGPCs derived from one-step activation/graphitization of N-rich polymer represent a promising route for preparing porous carbon materials with the high charge storage capacity and rate capability in the energy storage.

New Journal of Chemistry published new progress about Absorption. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Safety of 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Tian, Ya-Ya published the artcileDegradation of prometryn in Ruditapes philippinarum using ozonation: Influencing factors, degradation mechanism, pathway and toxicity assessment, Name: 1-Methylurea, the main research area is prometryn ozone Ruditapes philippinarum absorption ozonation degradation; Degradation; Mechanism; Ozone; Prometryn; Ruditapes philippinarum.

In recent years, prometryn was utilized as watergrass remover in the aquaculture industry, resulting in the accumulated residual in the aquatic products. The present study focuses on the ozone degradation of prometryn in the Ruditapes philippinarum. The ozone concentration in water increased along with the injection time (60min). The contents of hydroxyl (·OH) and superoxide (O2·-) radicals increased along with the ozone injection time. The effects of temperature, pH, prometryn initial concentration and ozone concentration on the removal efficiency of prometryn were evaluated. The maximum removal efficiency of 86.12% was obtained under the conditions of pH 7, prometryn initial concentration 0.05 mg/kg and the ozone concentration 4.2 mg/L at 28 °C for 30 min. Ion chromatog. (IC) and Fourier transform IR (FT-IR) spectroscopy results show that the S and N atoms in the outer layer of the triazine ring during the prometryn degradation process were oxidized and removed. A total of 30 intermediate compounds were identified using the gas chromatog.-mass spectrometry (GC-MS) method. Combined with the IC and FT-IR results, three possible degradation pathways of prometryn were proposed. The prometryn was finally degraded into some small mols. with reduced toxicity by 63.16% for 120 min ozonization treatment. Overall, our work provides a novel approach for prometryn degradation in Ruditapes philippinarum, which can be extended for removing the residues of agricultural and veterinary drugs in other aquatic products.

Chemosphere published new progress about Absorption. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Name: 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chen, Yu published the artcileWater absorption by deep eutectic solvents, SDS of cas: 598-50-5, the main research area is water vapor absorption deep eutectic solvent.

Deep eutectic solvents (DESs) are one type of green solvents. Most of the DESs could absorb water from air. However, even a trace amount of water can affect the chem. structure and phys. properties of DESs. To date, no study has been reported on the hygroscopicity of DESs. Consequently, in this study, a comprehensive investigation was performed on the capacity, kinetics, mechanism, and furthermore the dynamic process (by PCMW2D-COS IR spectra) of atm. water absorption from air by DESs. The results show that most DESs are highly hygroscopic. Surface absorption enhances the overall water absorption capacity by DESs in spite of decreasing the initial water absorption rate. In the beginning, the water absorption increases with an increase in the number of hydrophilic groups in DESs due to the retained DES nanostructure during this period. Therefore, DESs with more hydrophilic groups (ChCl:glucose than ChCl:xylitol) possess a higher water absorption initial rate. However, when the water absorption capacity is high, the hindrance from the H-bond strength from inner DESs needs to be overcome for the absorption of more water. In this case, DESs with stronger H-bonds (ChCl:glucose than ChCl:xylitol) have a lower steady-state water absorption capacity and an easier equilibrium

Physical Chemistry Chemical Physics published new progress about Absorption. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, SDS of cas: 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

McGillicuddy, Ryan D. published the artcileMetal-Organic Phase-Change Materials for Thermal Energy Storage, Recommanded Product: 1-Methylurea, the main research area is phase change material thermal energy storage metal organic.

The development of materials that reversibly store high densities of thermal energy is critical to the more efficient and sustainable utilization of energy. Herein, we investigate metal-organic compounds as a new class of solid-liquid phase-change materials (PCMs) for thermal energy storage. Specifically, we show that isostructural series of divalent metal amide complexes featuring extended hydrogen bond networks can undergo tunable, high-enthalpy melting transitions over a wide temperature range. Moreover, these coordination compounds provide a powerful platform to explore the specific factors that contribute to the energy d. and entropy of metal-organic PCMs. Through a systematic anal. of the structural and thermochem. properties of these compounds, we investigated the influence of coordination bonds, hydrogen-bond networks, neutral organic ligands, and outer-sphere anions on their phase-change thermodn. In particular, we identify the importance of high densities of coordination bonds and hydrogen bonds to achieving a high PCM energy d., and we show how metal-dependent changes to the local coordination environment during melting impact the entropy and enthalpy of metal-organic PCMs. These results highlight the potential of manipulating order-disorder phase transitions in metal-organic materials for thermal energy storage.

Journal of the American Chemical Society published new progress about Bond length. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Recommanded Product: 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Salkar, Akshay V. published the artcileNH- and CH-Substituted Ureas as Self-Assembly Directing Motifs for Facile Synthesis and Electrocapacitive Applications of Advanced WO3-x One-Dimensional Nanorods, HPLC of Formula: 598-50-5, the main research area is tungsten oxide nanorod capacitor urea self assembly oxygen vacancy.

Designing a solid state crystal architecture at nanoscale, using a soft chem. approach, is the key step toward their scalable synthesis for sustainable application in electrochem. charge storage devices. We investigate the application of NH- and CH-substituted ureas, namely, carbohydrazide, semicarbazide, N-methylurea, and tetramethylurea as design elements/motifs in the tailored synthesis of WO3-x nanostructures via direct calcination of tungstic acid-substituted urea hybrid gels. The SEM, HRTEM, SAED, XRD, XPS, and TG-DTA studies reveal that NH-substitution in urea induces a profound growth of WO3-x one-dimensional (1D) nanorods, preferentially growing along the (002) plane with enhancement in the percentage of oxygen vacancies. On the contrary, with the increase in CH-substitution in urea, the tendency to form 1D nanorods via self- assembly process decreases, possibly due to an increase in the steric effect of the Me groups. We further demonstrate the corresponding effect of morphol. and chem. changes in WO3-x nanostructure on their improved electrified interfacial processes via H+ intercalation using cyclic voltammetry, galvanostatic charge-discharge, electrochem. impedance spectroscopy tests, and chronoamperometric studies. Our findings reveal that the enhancement in WO3-x nanorod growth, W5+/W6+ redox surface states, and abundance of (002) surface plane due to NH-substitution in urea play a crucial role in facilitating the diffusion process of H+/e- in and out of the WO3-x matrix. An area specific capacitance of 132 mF cm-2 at the c.d. of 1 mA cm-2 with excellent capacitance retention is reported. Moreover, significant improvements in the charge-discharge times were observed, the highest being the one for WO3-x nanorods obtained using carbohydrazide, demonstrating its potential for possible application in designing 1D nanomaterials for energy storage systems.

ACS Applied Energy Materials published new progress about Calcination. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, HPLC of Formula: 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Molnar, Maja published the artcileCholine Chloride Based Deep Eutectic Solvents as a Tuneable Medium for Synthesis of Coumarinyl 1,2,4-Triazoles: Effect of Solvent Type and Temperature, COA of Formula: C2H6N2O, the main research area is isothiocyanate acetohydrazide deep eutectic solvent temperature effect cyclization green; coumarinyl triazole preparation.

A study of 1,2,4-triazole synthesis from 2-((4-methyl-2-oxo-2H-chromen-7-yl)oxy)acetohydrazide (I) or 2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetohydrazide (II) and various isothiocyanates, in deep eutectic solvents, was performed. In order to find the best conditions for 1,2,4-triazole formation, a model reaction on I and phenylisothiocyanate was performed in 14 different choline chloride based deep eutectic solvents, at two different temperatures (40 °C and 80 °C). Pure 1,2,4-triazoles were obtained in choline chloride/urea (1:2) and choline chloride/N-Me urea (1:3) deep eutectic solvents at 80 °C. Pure thiosemicarbazides were obtained in choline chloride/ethane-1,2-diol (1:2), choline chloride/malic acid (1:1), choline chloride/malonic acid (1:1), choline chloride/butane-1,4-diol (1:3) and choline chloride/glycerole (1:2) at 40 °C. The ratio of 1,2,4-triazoles and thiosemicarbazides in reaction mixtures was determined by HPLC and 1H NMR. After the best conditions for 1,2,4-triazole synthesis were found, some coumarinyl 1,2,4-triazoles were synthesized from two different coumarinyl hydrazides and various alkyl and aryl isothiocyanates in one step reaction.

European Journal of Organic Chemistry published new progress about Cyclization. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, COA of Formula: C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kishore, M. V. published the artcileDevelopment of RP-HPLC method for the determination of N-methylurea content in methohexital drug substance and its validation, Application of 1-Methylurea, the main research area is N methylurea methohexital reversed phase high performance liquid chromatog.

A simple, sensitive and rapid RP-HPLC method developed and validated for the determination of residual impurity N-Methylurea at low level in Methohexital drug substance. In this method column conditions are established and optimized on Atlantis dC18, 250 mm × 4.6 mm, 5μm column with oven temperature maintaining at 40°C. 0.02M Potassium Phosphate buffer was chosen as mobile phase A and acetonitrile was selected as mobile phase B in gradient reverse phase mode. Chromatog. parameters such as flow rate of mobile phase was maintained at 0.7 mL/min, 50μl of injection volume, total runtime 35 min, were established and detected the analyte at 205 nm in the present methodol. Based on validation data, the method is found to be specific, sensitive, accurate and precise. The Limit of detection (LOD) and Limit of quantification (LOQ) for this impurity is found to be 0.002%weight/weight and 0.005%weight/weight resp. The average recovery obtained was 96.9% at four levels in twelve determinations for N-Methylurea in Methohexital drug substance. This method can be used as good quality control tool for quantization of N-Methylurea at low level. The exptl. results are discussed in detail in this research paper.

International Journal of Pharmacy and Pharmaceutical Research published new progress about Anesthetics. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Application of 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Vinothkumar, P. published the artcileA novel n-methylurea cyanurate single crystal: structural and physical characterizations for magneto-electronics applications, Related Products of isoquinoline, the main research area is methylurea cyanurate single crystal magnetoelectronics structural phys property.

A urea derivative of novel intermittent N-methylurea cyanurate (NMUC) crystalline salt was synthesized using methanol solvent, and thus crystals growing in same medium under the slow evaporation techniques governed by the reflux method. Mol. structure and other crystallog. parameters of grown crystalline salt was refined using SHELX program. Crystalline perfection was examined using high resolution X-ray diffraction anal. Elemental compositions of grown crystal were measured using CHNX anal. The mol. structure of the grown crystal is further confirmed by 1H and 13C NMR spectral anal. The Differential scanning calorimetric (DSC) is used to determine the sp. heat capacity of the grown crystal in the temperature range from 303 to 373 K. Hardness measurement was performed on the (100), (110) and (001) crystallog. planes of this crystal, which elucidates their hardness nature including the yield strength (σy) and elastic stiffness constant (C11) associated with the applied loads. The Laser induced threshold damage of NMUC was calculated using Nd:YAG laser. The magnetic behavior of the compound was studied through the hysteresis loop using Vibrating sample magnetometery technique. Photoconductivity anal. was used to measure the dark-current and photocurrent of grown crystal under the applied DC voltage between 20 and 400 V.

Journal of Molecular Structure published new progress about Aromaticity. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Hogberg, Mona N. published the artcileCarbon-nitrogen relations of ectomycorrhizal mycelium across a natural nitrogen supply gradient in boreal forest, Application of 1-Methylurea, the main research area is boreal forest ectomycorrhizal mycelium carbon nitrogen relation; Betsele N supply gradient; boreal forest; carbon limitation; ectomycorrhizal fungi; extramatrical ectomycorrhizal mycelium; natural abundance of 13C and 15N; nitrogen limitation; stable isotope mixing model analysis.

The supply of carbon (C) from tree photosynthesis to ectomycorrhizal (ECM) fungi is known to decrease with increasing plant nitrogen (N) supply, but how this affects fungal nutrition and growth remains to be clarified. We placed mesh-bags with quartz sand, with or without an organic N (15N-, 13C-labeled) source, in the soil along a natural N supply gradient in boreal forest, to measure growth and use of N and C by ECM extramatrical mycelia. Mycelial C : N declined with increasing N supply. Addition of N increased mycelial growth at the low-N end of the gradient. We found an inverse relationship between uptake of added N and C; the use of added N was high when ambient N was low, whereas use of added C was high when C from photosynthesis was low. We propose that growth of ECM fungi is N-limited when soil N is scarce and tree belowground C allocation to ECM fungi is high, but is C-limited when N supply is high and tree belowground C allocation is low. This suggests that ECM fungi have a major role in soil N retention in nutrient-poor, but less so in nutrient-rich boreal forests.

New Phytologist published new progress about Bags (Mesh). 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Application of 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem