Tag: M.W=50-100

Peng, Panpan published the artcileSynthesis of energetic salts containing three heterocyclic anions by a one-pot condensation reaction, Application of 3,5-Diamino-1,2,4-triazole, the main research area is energetic salt heterocyclic anion preparation one pot reaction safety.

Heterocyclic energetic salts are extensively used in energetic materials due to their excellent mol. designability. Generally, most inorganic or organic anionic energetic ionic salts contain only one anion or two anions at most. Thus far, energetic ion salts containing three organic energetic anions have not been reported. In this study, we develop a new method for the preparation of energetic ion salts containing three heterocyclic anions via a one-step one-pot condensation reaction. The proposed strategy is based on aldehydes, aminoguanidine salts, and heterocyclic energetic ionic salts. In this work, energetic salt 1 containing three 5-nitrotetrazole anions and energetic salt 2 containing three 3,5-dinitro-1,2,4-triazole anions were successfully synthesized. The results of NMR, IR, and MS proved that the products (1 and 2) contain three heterocyclic anions. The energetic test results indicate that products 1 and 2 have extremely high decomposition temperatures (250 °C and 308 °C) and exhibit low sensitivities (for both 1 and 2, FS > 360 N, IS > 40 J). Meanwhile, their detonation velocities (7306 m s-1 and 7375 m s-1) and detonation pressures (18.3 GPa and 19.7 GPa) are better than those of TNT. This indicates that 1 and 2 have great potential to be applied as heat-resistant insensitive explosives. In addition, the X-ray diffraction results of the non-energetic, p-toluenesulfonic acid anions of product 3 not only further verify the structure of the three heterocyclic anions mentioned above, but also confirm the universality of this method.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Peng, Panpan published the artcileSynthesis of energetic salts containing three heterocyclic anions by a one-pot condensation reaction, Formula: C2H5N5, the main research area is energetic salt heterocyclic anion preparation one pot reaction safety.

Heterocyclic energetic salts are extensively used in energetic materials due to their excellent mol. designability. Generally, most inorganic or organic anionic energetic ionic salts contain only one anion or two anions at most. Thus far, energetic ion salts containing three organic energetic anions have not been reported. In this study, we develop a new method for the preparation of energetic ion salts containing three heterocyclic anions via a one-step one-pot condensation reaction. The proposed strategy is based on aldehydes, aminoguanidine salts, and heterocyclic energetic ionic salts. In this work, energetic salt 1 containing three 5-nitrotetrazole anions and energetic salt 2 containing three 3,5-dinitro-1,2,4-triazole anions were successfully synthesized. The results of NMR, IR, and MS proved that the products (1 and 2) contain three heterocyclic anions. The energetic test results indicate that products 1 and 2 have extremely high decomposition temperatures (250 °C and 308 °C) and exhibit low sensitivities (for both 1 and 2, FS > 360 N, IS > 40 J). Meanwhile, their detonation velocities (7306 m s-1 and 7375 m s-1) and detonation pressures (18.3 GPa and 19.7 GPa) are better than those of TNT. This indicates that 1 and 2 have great potential to be applied as heat-resistant insensitive explosives. In addition, the X-ray diffraction results of the non-energetic, p-toluenesulfonic acid anions of product 3 not only further verify the structure of the three heterocyclic anions mentioned above, but also confirm the universality of this method.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Baranov, Vladimir V. published the artcileA first synthesis of 8- and 8,10-substituted barbiturils and their thio analogues, Recommanded Product: 1-Methylurea, the main research area is barbituril preparation; alkyl urea formaldehyde barbituric acid multicomponent condensation.

Multicomponent condensations of alkyl(thio)ureas R1NHC(=X)NHR2 (R1 = Me, Et; R2 = H, Me, Et; X = O, S), formaldehyde and (thio)barbituric acids as 1,3-diazinane-2,4,6-trione, 2-sulfanylidene-1,3-diazinane-4,6-dione afford new spiro heterocyclic compounds, I (Y = O, S) viz., 8- and 8,10-substituted 2,4,8,10-tetraazaspiro[5.5]undecane-1,3,5,9-tetraones (barbiturils) and their thio analogs.

Mendeleev Communications published new progress about Condensation reaction. 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

Gavezzotti, Angelo published the artcileMolecular dynamics simulation of organic crystals: introducing the CLP-dyncry environment, Application of 1-Methylurea, the main research area is organic crystal Coulomb potential hydrogen bond radial distribution function.

The CLP-dyncry mol. dynamics (MD) program suite and force field environment is introduced and validated with its ad hoc features for the treatment of organic crystalline matter. The package, stemming from a preliminary implementation on organic liquids (Gavezzotti & Lo Presti, 2019), includes modules for the preliminary generation of mol. force field files from ab initio derived force constants, and for the preparation of crystalline simulation boxes from general crystallog. information, including Cambridge Structural Database CIFs. The intermol. potential is the atom-atom Coulomb-London-Pauli force field, well tested as calibrated on sublimation enthalpies of organic crystals. These products are then submitted to a main MD module that drives the time integration and produces dynamic information in the form of coordinate and energy trajectories, which are in turn processed by several kinds of crystal-oriented analytic modules. The whole setup is tested on a variety of bulk crystals of rigid, non-rigid and hydrogen-bonded compounds for the reproduction of radial distribution functions and of crystal-specific collective orientational variables against X-ray data. In a series of parallel tests, some advantages of a dedicated program as opposed to software more oriented to biomol. simulation (Gromacs) are highlighted. The different and improved view of crystal packing that results from joining static structural information from X-ray anal. with dynamic upgrades is also pointed out. The package is available for free distribution with I/O examples and Fortran source codes.

Journal of Applied Crystallography published new progress about Bond angle (hydrogen bond). 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

Hu, Yubing published the artcileVisualization of Biogenic Amines and In Vivo Ratiometric Mapping of Intestinal pH by AIE-Active Polyheterocycles Synthesized by Metal-Free Multicomponent Polymerizations, Formula: C2H6N2O, the main research area is biogenic amine indium ratiometric mapping intestinal pH.

Acid-base homeostasis is crucial for normal physiol., metabolism, and functions of living organisms. Thus, the development of effective techniques to monitor it either in vitro or in vivo is in great demand. Herein, a series of multifunctional oxazine-containing polyheterocycles with aggregation-induced emission characteristics are in situ generated by metal-free one-pot A3 polymerizations of terminal diynes, dialdehydes, and ureas. Most of the polymers are synthesized with high mol. weights (Mw up to 49 900) in nearly quant. yields and display intense solid-state emission and remarkable fluorescence response to protonation and deprotonation. Based on the unique photophys. properties, a fast responsive and reversible fluorescent sensor for ammonia with a detection limit of 960 ppb is achieved and applied for detecting biogenic amines and seafood spoilage. Besides, the polymeric nanoparticles show excellent lysosome-targeting specificity in cell imaging. The polyheterocycles show ratiometric pH sensing behavior with a broad acid-base response window from pH 1 to 9, which shed light on visualizing physiol. pH in gastrointestinal tract. Taking freshwater Cladocera Moina macrocopa as a model organism, in vivo mapping of its intestinal pH shows an increased pH gradient approx. from 4.2 to 7.8 along the foregut, midgut, and hindgut.

Advanced Functional Materials published new progress about Aggregation-induced emission. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Formula: C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ryskaliyeva, Alma Kairlapovna published the artcileRegularities of enthalpies of combustion of nitrogen-containing organic compounds, Synthetic Route of 598-50-5, the main research area is nitrogen organic compound combustion enthalpy.

In the following work, the enthalpies of combustion of 16 -nitrogencontg. organic compounds – amides and anilides were exptl. determined using the method of bomb calorimetry. The regularities of the course of the change in the enthalpies of combustion of these compounds have been found. Thus, the anal. of the obtained data revealed the presence of two correlation dependences for these substances. The established correlations indicate the dependence of the numerical values of enthalpies of combustion on stoichiometric amount of oxygen in chem. reaction equations for the complete combustion of amides and anilides. To evaluate the efficiency of new correlations, they were tested on exptl. data obtained by the other authors on the example of combustion of other 9 amides and 7 anilides. For these compounds, the exptl. values of enthalpies of combustion and the calculated values do not diverge by more than 10%. This indicates the efficiency of the proposed ratios for predicting enthalpies of combustion of not yet studied amides and anilides.

Journal of the Chemical Society of Pakistan published new progress about Amides Role: PRP (Properties). 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Synthetic Route of 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ryskaliyeva, Alma K. published the artcileEmpirical method for predicting the enthalpy changes of combustion of amides, Synthetic Route of 598-50-5, the main research area is amide combustion enthalpy thermochem.

The enthalpy change of combustion is one of the basic thermochem. characteristics of an organic compound, indicating the amount of heat produced in the complete combustion of the substance. The enthalpy changes of combustion of many organic compounds have been exptl. determined Hitherto, the existing empirical approaches have aimed at calculating the combustion enthalpy change of individual classes only, which do not always satisfactorily agree with the exptl. results. Therefore, the method of correlation-regression anal. is proposed herein to establish the combustion enthalpy changes of previously unexplored compounds As is known, a linear relationship between two characteristics is possible only if both of them obey the principle of additivity, i.e., in a homologous series of organic compounds with increasing number of CH2-groups, the value of additive characteristic (for example, the enthalpy change of vaporization) should increase by a certain constant amount

Journal of the Serbian Chemical Society published new progress about Amides Role: PRP (Properties). 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Synthetic Route of 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chen, Wei published the artcileDirect arene C-H fluorination with 18F- via organic photoredox catalysis, COA of Formula: C2H6N2O, the main research area is arene carbon hydrogen bond fluorination photoredox catalyst; cancer diagnosis imaging agent.

Positron emission tomog. (PET) is a widely used imaging technique for medical diagnostics and pharmaceutical development. As the name implies, it requires tracers that emit positrons, typically through labeling with fluorine or carbon radioisotopes. W. Chen et al. devised a versatile technique to incorporate radioactive fluoride into aromatic rings. The metal-free photochem. method directly substitutes aryl carbon-hydrogen bonds with [18F]fluoride and so is particularly well suited to late-stage transformation of complex mols. into tracers. Science, this issue p. 1170.

Science (Washington, DC, United States) published new progress about C-H bond activation catalysts. 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

Li, Ying published the artcileHighly Sensitive Detection of Mercury Ions Using Zincophosphite Framework Nanoparticle-Polyaniline Composites, Category: isoquinoline, the main research area is mercury ions zincophosphite framework nanoparticle polyaniline composite.

This study reports a highly sensitive mercury ion sensor composed of the zincophosphite framework nanoparticle (NTOU4nano) blended with in situ synthesized conductive polyaniline (PANI). High stability of the pristine zincophosphite solid not only renders a facile nanosizing treatment feasible but also allows it to withstand the electrochem. PANI deposition at a low pH condition. PANI significantly enhances the surface coverage concentration and increases the electron transfer capability of the resulting composite. Cyclic voltammetry (CV), differential pulse voltammetry (DPV), hydrodynamic amperometry, and electrochem. impedance spectroscopy (EIS) are used to characterize and optimize the electroanal. performance of the nanocomposite. The resulting electrochem. sensor shows a linear dynamic range for mercury ion detection ranging from 0.05 to 27.5 nM and exhibits one of the lowest limits of detection (LODs) of 3.49 x 10-11 M reported using crystalline organic-inorganic hybrids. Addnl., the practical utility of the nanocomposite for mercury ion sensing is demonstrated using water samples containing high salt concentrations, as well as from the environment including the seawater and river water. In short, the reported nanocomposite is among one of the first metallophosphite materials being consolidated with PANI as an integrated sensing platform for highly sensitive mercury ion detection and holds good promise for early-warning application.

ACS Applied Nano Materials published new progress about Chemically modified electrodes. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Li, Ying published the artcileHighly Sensitive Detection of Mercury Ions Using Zincophosphite Framework Nanoparticle-Polyaniline Composites, Recommanded Product: 3,5-Diamino-1,2,4-triazole, the main research area is mercury ions zincophosphite framework nanoparticle polyaniline composite.

This study reports a highly sensitive mercury ion sensor composed of the zincophosphite framework nanoparticle (NTOU4nano) blended with in situ synthesized conductive polyaniline (PANI). High stability of the pristine zincophosphite solid not only renders a facile nanosizing treatment feasible but also allows it to withstand the electrochem. PANI deposition at a low pH condition. PANI significantly enhances the surface coverage concentration and increases the electron transfer capability of the resulting composite. Cyclic voltammetry (CV), differential pulse voltammetry (DPV), hydrodynamic amperometry, and electrochem. impedance spectroscopy (EIS) are used to characterize and optimize the electroanal. performance of the nanocomposite. The resulting electrochem. sensor shows a linear dynamic range for mercury ion detection ranging from 0.05 to 27.5 nM and exhibits one of the lowest limits of detection (LODs) of 3.49 x 10-11 M reported using crystalline organic-inorganic hybrids. Addnl., the practical utility of the nanocomposite for mercury ion sensing is demonstrated using water samples containing high salt concentrations, as well as from the environment including the seawater and river water. In short, the reported nanocomposite is among one of the first metallophosphite materials being consolidated with PANI as an integrated sensing platform for highly sensitive mercury ion detection and holds good promise for early-warning application.

ACS Applied Nano Materials published new progress about Chemically modified electrodes. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Recommanded Product: 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem