Category: isoquinoline

Niu, Hao-Xin published the artcileA Furan-based Phosphaphenanthrene-containing Derivative as a Highly Efficient Flame-retardant Agent for Epoxy Thermosets without Deteriorating Thermomechanical Performances, Synthetic Route of 1455-77-2, the main research area is furan phosphaphenanthrene flame retardant agent epoxy thermoset; mech thermal property.

In order to reduce greenhouse gas emissions, developing flame retardants from bio-based resources has aroused extensive interest in recent years. In this work, we utilized furfural (biomass) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) to synthesize a bio-based co-curing agent (FGD) to combine with 4,4′-diaminodiphenyl methane (DDM) for obtaining a low-phosphorus loading flame-retardant epoxy thermosets. The introduction of FGD decreased the activation energy of the curing progress, enhanced the mech. properties of the epoxy thermosets, and did not affect the glass transition temperature of the epoxy thermosets. EP-5.0 had a lower thermal degradation rate and a doubled char yield compared with EP-0. The phosphorus content of EP-5.0 was only 0.45 wt%, while EP-5.0 reached the UL-94 V-0 rating with a high LOI value of 32%. Compared with EP-0, the PHRR of EP-2.5 and EP-5.0 decreased by 22.3% and 31.3%, resp. The SEM results showed that the addition of FGD made the char residues more uniform and denser, which could effectively prevent combustible volatiles from escaping from the degradation area to the flame area and isolate the heat transfer so that the epoxy thermosets had an excellent flame-retardant performance.

Chinese Journal of Polymer Science published new progress about Activation energy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Synthetic Route of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yang, Jingxin published the artcileUnexpected degradation and deiodination of diatrizoate by the Cu(II)/S(IV) system under anaerobic conditions, Formula: C11H9I3N2O4, the main research area is diatrizoate degradation deiodination copper sulfite system anaerobic condition; Anaerobic degradation; Cu(I); copper; deiodination; diatrizoate; sulfite.

Transition metal catalyzed sulfite auto-oxidation is a promising technol. used in water and wastewater treatment for the elimination of contaminants. In the literature, this process has been reported to be efficient only in the presence of oxygen. However, in this study, we unexpectedly found that the degradation of diatrizoate (DTZ) by a system based on the combination of copper ion and sulfite (Cu(II)/S(IV)) reached over 95% under anaerobic conditions, but was considerably retarded under aerobic conditions at pH 7. Furthermore, it was found that Cu(I), generated from the cleavage of the CuSO3 complex, was the main reactive species responsible for the degradation of DTZ by the Cu(II)/S(IV) system under anaerobic conditions. In fact, the absence of oxygen promoted the accumulation of Cu(I). The concomitant release of the iodide ion with the degradation of DTZ indicated that the anaerobic degradation of DTZ by the Cu(II)/S(IV) system mainly proceeded through the deiodination pathway, which was also confirmed by the detection of deiodinated products. The anaerobic degradation of DTZ was favored at higher initial concentrations of Cu(II) or sulfite in this system. Since the CuSO3 complex, the precursor of Cu(I), was formed mainly at pH 7, the highest anaerobic degradation of DTZ was achieved at pH 7. An increase in reaction temperature considerably enhanced the degradation of DTZ by the Cu(II)/S(IV) system with an apparent activation energy of 119.4 kJ/mol. The presence of chloride, bicarbonate and humic acid slightly influenced the anaerobic degradation of DTZ. The experiments with real water samples also demonstrated the effectiveness of the degradation of DTZ by the Cu(II)/S(IV) system under anaerobic conditions.

Water Research published new progress about Activation energy. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Fan, Chunyang published the artcileIncorporating self-anchored phosphotungstic acid@triazole-functionalized covalent organic framework into sulfonated poly(ether ether ketone) for enhanced proton conductivity, HPLC of Formula: 1455-77-2, the main research area is triazole functionalized covalent organic framework phosphotungstic acid proton conductivity.

The design of new types of proton-conductive materials with high proton conductivity has sparked tremendous interest. Covalent organic framework (COF), a new category of porous crystalline materials possessing well-defined porosity and tunable functionality, holds great potential as next-generation proton conductors. Here, triazole COF loaded with phosphotungstic acid (HPW@COF) has been incorporated into sulfonated poly(ether ether ketone) (SPEEK) matrix to fabricate SPEEK/HPW@COF composite membranes. The one-dimensional channels of COF lined with protonated triazole (triazolium cations) by hydroscopic HPW and neutral triazole as well as counter anions (PO40W3-12) could act as proton-donors and -acceptors forming interconnected hydrogen-bonding networks, thus greatly facilitating proton conduction via Grotthuss-type mechanism particularly under low RH. Accordingly, SPEEK/HPW@COF displayed 35.5 times higher proton conductivity than the plain SPEEK at 65°C, 40% RH. Moreover, the proton conductivity of SPEEK/HPW@COF remained constant during soaking in water for 15 days, indicating the excellent immobilization of HPW due to the electrostatic interaction between basic nitrogen sites and HPW as well as the confinement effect of microporous COF channels. These results demonstrated that N-heterocycles functionalized COFs gave great promise as effective hosts to encapsulate proton carriers.

Solid State Ionics published new progress about Activation energy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, HPLC of Formula: 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Fan, Chunyang published the artcileIncorporating self-anchored phosphotungstic acid@triazole-functionalized covalent organic framework into sulfonated poly(ether ether ketone) for enhanced proton conductivity, Quality Control of 1455-77-2, the main research area is triazole functionalized covalent organic framework phosphotungstic acid proton conductivity.

The design of new types of proton-conductive materials with high proton conductivity has sparked tremendous interest. Covalent organic framework (COF), a new category of porous crystalline materials possessing well-defined porosity and tunable functionality, holds great potential as next-generation proton conductors. Here, triazole COF loaded with phosphotungstic acid (HPW@COF) has been incorporated into sulfonated poly(ether ether ketone) (SPEEK) matrix to fabricate SPEEK/HPW@COF composite membranes. The one-dimensional channels of COF lined with protonated triazole (triazolium cations) by hydroscopic HPW and neutral triazole as well as counter anions (PO40W3-12) could act as proton-donors and -acceptors forming interconnected hydrogen-bonding networks, thus greatly facilitating proton conduction via Grotthuss-type mechanism particularly under low RH. Accordingly, SPEEK/HPW@COF displayed 35.5 times higher proton conductivity than the plain SPEEK at 65°C, 40% RH. Moreover, the proton conductivity of SPEEK/HPW@COF remained constant during soaking in water for 15 days, indicating the excellent immobilization of HPW due to the electrostatic interaction between basic nitrogen sites and HPW as well as the confinement effect of microporous COF channels. These results demonstrated that N-heterocycles functionalized COFs gave great promise as effective hosts to encapsulate proton carriers.

Solid State Ionics published new progress about Activation energy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Quality Control of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Adamek, Jakub published the artcileGeneration and Reactivity of 1-Imidocarbenium Cations in the Friedel-Crafts-type Reaction, COA of Formula: C8H10O2, the main research area is generation reactivity Imidocarbenium cation Friedel Crafts reaction.

Herein, we discuss the formation and reactivity of 1-imidocarbenium cations in Friedel-Crafts-type reaction between 1-imidoalkylphosphonium salts and arenes. The observed weakening of Cα-P+ bond is described qual. and quant. The determination of rate constants and activation energies of Cα-P+ bond cleavage enabled systematic reactivity investigations of a series of phosphonium salts with different structures. Finally, the application scope for the imidoalkylation of aromatic hydrocarbons was explored. The results confirm that the generated 1-imidocarbenium cations are reactive enough to alkylate strongly activated, less-activated, or even inactivated aromatic compounds

ACS Omega published new progress about Activation energy. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, COA of Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yuan, Jun published the artcileA phosphaphenanthrene-based derivative as multifunctional flame retardant for epoxy resins, Product Details of C2H5N5, the main research area is phosphaphenanthrene multifunctional flame retardant epoxy resin.

In this work, the transparent, mech. strengthened, flame retardant and smoke suppression epoxy resin (EP) composites was prepared by the addition of an indole/phosphaphenanthrene-based compound (IDT). The results presented that limiting oxygen index (LOI) of EP composite containing 5 weight% IDT raised to 32% and it passed a UL-94 V-0 rating. In the meantime, compared with EP, total smoke production (TSP) and the peak of heat release (PHRR) of EP/IDT5 were decreased by 51.9% and 32.1%, resp. The flame-retardant mechanism of EP/IDT was also explored by pyrolysis/gas chromatog.-mass spectrometry (Py-GC/MS), scanning electron microscope (SEM) and XPS. Besides, the bending and tensile strengths were improved thanks to the presence of π-π conjugation and hydrogen bonds between IDT and EP. This work provided a promising way to meet the increasing multifunctional requirements of EP composites.

Reactive & Functional Polymers published new progress about Activation energy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Product Details of C2H5N5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yuan, Jun published the artcileA phosphaphenanthrene-based derivative as multifunctional flame retardant for epoxy resins, SDS of cas: 1455-77-2, the main research area is phosphaphenanthrene multifunctional flame retardant epoxy resin.

In this work, the transparent, mech. strengthened, flame retardant and smoke suppression epoxy resin (EP) composites was prepared by the addition of an indole/phosphaphenanthrene-based compound (IDT). The results presented that limiting oxygen index (LOI) of EP composite containing 5 weight% IDT raised to 32% and it passed a UL-94 V-0 rating. In the meantime, compared with EP, total smoke production (TSP) and the peak of heat release (PHRR) of EP/IDT5 were decreased by 51.9% and 32.1%, resp. The flame-retardant mechanism of EP/IDT was also explored by pyrolysis/gas chromatog.-mass spectrometry (Py-GC/MS), scanning electron microscope (SEM) and XPS. Besides, the bending and tensile strengths were improved thanks to the presence of π-π conjugation and hydrogen bonds between IDT and EP. This work provided a promising way to meet the increasing multifunctional requirements of EP composites.

Reactive & Functional Polymers published new progress about Activation energy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, SDS of cas: 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Subagyono, Rr dirgarini j. n. published the artcilePyrolysis of fast growing wood Macaranga gigantea: Product characterisation and kinetic study, SDS of cas: 86-51-1, the main research area is growing wood macaranga gigantea pyrolysis activation energy.

Fast-growing wood Macaranga gigantea has been pyrolyzed and its pyrolysis products have been characterized and their formation kinetics studied. Pyrolysis of M. gigantea wood was carried out by varying the temperature and time of pyrolysis to determine the effect of these two parameters on product yields and product characteristics. In general, an increase in pyrolysis temperature and time increased the yield of liquid and gas products, the concentration of cellulose, hemicellulose and lignin-derived compounds, but decreased the biochar yield. The organic phase liquid pyrolysis products mainly contained phenolic compounds and their derivatives, eugenols, furans, aldehydes and ketones. Fourier-transform IR spectroscopy and pyrolysis-gas chromatog.-mass spectrometry analyses of biochar showed that thermal decomposition of M. gigantea required temperatures higher than 300°C to optimize thermal decomposition and carbonization of lignin, cellulose and hemicellulose. The concentration of phenols and benzenediols in biochar decreased with an increase in pyrolysis temperature M. gigantea pyrolysis kinetics studies showed that wood pyrolysis occurred through four main stages with activation energy (Eα) values, based on calculations by the Friedman and Kissinger-Akahira-Sunose methods, of 28.1-99.0 kJ/mol and 35.6-104.9 kJ/mol, resp. The spectra produced by thermogravimetric analyzer coupled with a Fourier-transform IR spectroscopy showed that H2O and CO2 were produced during pyrolysis and the volatile compounds produced were predominantly phenolic compounds, in accord with characterization results of the liquid products by gas chromatog.-mass spectrometry and NMR spectroscopy.

Fuel published new progress about Activation energy. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, SDS of cas: 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chan, Yuk-Cheung published the artcileHalogen-Bond-Catalyzed Addition of Carbon-Based Nucleophiles to N-Acylimminium Ions, Computed Properties of 151-10-0, the main research area is nucleophile hemiaminal ether addition iodoimidazolium; isoindoline preparation; iodoimidazolium addition catalyst.

N-acylimminium ions are an important class of synthetic intermediates to produce diverse products upon treatment with different nucleophiles. Most of the reported catalytic protocol involved moisture-sensitive Lewis acids or transition metal. Herein, an organocatalytic version by using halogen-bond catalyst as mild Lewis acid through anion-abstraction strategy, is reported. A preliminary result of enantioselective version by employing a chiral BINOL-phosphate anion has also been demonstrated.

Organic Letters published new progress about Addition reaction. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Sun, Wei published the artcileChemodivergent transformations of amides using gem-diborylalkanes as pro-nucleophiles, Application of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is amide diborylalkane chemoselective addition elimination reaction.

A chemodivergent transformation of primary, secondary and tertiary amides by using 1,1-diborylalkanes as pro-nucleophiles was disclosed. In general, selective B-O elimination occurred for primary, secondary amides and tertiary lactams to generated enamine intermediate, while tertiary amides undergo B-N elimination to generated enolate intermediate. Various in-situ electrophilic trapping of those intermediates allowed the chemoselective synthesis of α-functionalized ketones, β-aminoketones, enamides, β-ketoamides, γ-aminoketones and cyclic amines from primary, secondary, tertiary amides and lactams. The key for these transformations was the enolization effect after the addition of α-boryl carbanion to amides.

Nature Communications published new progress about Addition reaction. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Application of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem