Category: isoquinoline

Sjerps, Rosa M. A. published the artcileProjected impact of climate change and chemical emissions on the water quality of the European rivers Rhine and Meuse: A drinking water perspective, Safety of Diatrizoic Acid, the main research area is climate change wastewater river drinking water pollution.

Low river discharges of the rivers Rhine and Meuse are expected to occur more often and more prolonged in a changing climate. During these dry periods the dilution of point sources such as sewage effluents is reduced leading to a decline in chem. water quality. This study projects chem. water quality of the rivers Rhine and Meuse in the year 2050, based on projections of chem. emissions and two climate scenarios: moderate and fast climate change. It focuses on specific compounds known to be relevant to drinking water production, i.e. four pharmaceuticals, a herbicide and its metabolite and an artificial sweetener. Hydrol. variability, climate change, and increased emission show a significant influence on the water quality in the Rhine and Meuse. The combined effect of changing future emissions of these compounds and reduced dilution due to climate change has leaded to increasing (peak) concentrations in the river water by a factor of two to four. Current water treatment efficiencies in the Netherlands are not sufficient to reduce these projected concentrations in drinking water produced from surface water below precautionary water target values. If future emissions are not sufficiently reduced or treatment efficiencies are not improved, these compounds will increasingly be found in drinking water, albeit at levels which pose no threat to human health.

Science of the Total Environment published new progress about Climate. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Safety of Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Moschet, Christoph published the artcileEvaluation of in-situ calibration of Chemcatcher passive samplers for 322 micropollutants in agricultural and urban affected rivers, HPLC of Formula: 117-96-4, the main research area is agricultural urban river water micropollutant chemcatcher passive sampler caliberation; Liquid chromatography high resolution mass spectrometry; Monitoring; Pesticides; Pharmaceuticals; Styrenedivinylbenzene; Surface water.

In a large field study, the in-situ calibration of the Chemcatcher passive sampler – styrenedivinylbenzene (SDB) covered by a polyether sulfone (PES) membrane – was evaluated for 322 polar organic micropollutants. Five rivers with different agricultural and urban influences were monitored from March to July 2012 with two methods (i) two-week time-proportional composite water samples and (ii) two-week passive sampler deployment. All substances – from different substance classes with logKow -3 to 5, and neutral, anionic, cationic, and zwitterionic species – were analyzed by liquid-chromatog. high-resolution tandem mass spectrometry. This study showed that SDB passive samplers are well-suited for the qual. screening of polar micropollutants because the number of detected substances was similar (204 for SDB samples vs. 207 for composite water samples), limits of quantification were comparable (median: 1.3 ng/L vs. 1.6 ng/L), and the handling in the field and laboratory is fast and easy. The determination of in-situ calibrated sampling rates (field Rs) was possible for 88 compounds where the R2 from the regression (water concentration vs. sampled mass on SDB disk) was >0.75. Substances with moderately fluctuating river concentrations such as pharmaceuticals showed much better correlations than substances with highly fluctuating concentrations such as pesticides (R2 > 0.75 for 93% and 60% of the investigated substances, resp.). Flow velocity (0.05-0.8 m/s) and temperature (5-20 °C) did not have an evident effect on the field Rs. It was observed that ionic species had significantly lower field Rs than neutral species. Due to the complexity of the different transport processes, a correlation between determined field Rs and logDow could only predict Rs with large uncertainties. We conclude that only substances with relatively constant river concentrations can be quantified accurately in the field by passive sampling if substance-specific Rs are determined For that purpose, the proposed in-situ calibration is a very robust method and the substance specific Rs can be used in future monitoring studies in rivers with similar environmental conditions (i.e., flow velocity, temperature, pH).

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Makarov, Dmitriy M. published the artcileDensity measurements of water – N-methylacetamide mixture at temperatures from 274.15-333.15 k and ambient pressure and comparison of the volumetric characteristics of some amides, Synthetic Route of 598-50-5, the main research area is water methylacetamide density atm pressure molar volume.

The densities ρ of the binary mixture of N-methylacetamide with water have been measured in the entire composition range of the mixture liquid state at T = (278.15, 288.15, 298.15, 308.15, 323.15 and 333.15) K at atm. pressure (0.1 MPa). The densities were also measured for dilute aqueous solutions of N-methylacetamide (from 0.00455-0.05743 mol fractions) at a temperature from 274.15-283.15 K, with an increment of 1 K at atm. pressure, in order to study the effect of N-methylacetamide on the temperature of the maximum water d. These data were later used to calculate the excess molar volumes . VEm., partial molar volumes of water V1 and N-methylacetamide V2, and to obtain the limiting partial molar volumes V∞i and limiting partial molar isobaric expansion of N-methylacetamide E∞P,2. The following volumetric characteristics were then obtained from these values: the shift temperature of the maximum d., Hepler’s constant, the pressure derivative of the second virial coefficient, relative volumetric parameter of hydration. The obtained parameters show the effect of N-methylacetamide on water. The study also included a comparison of these volumetric characteristics for several aqueous solutions of amides: acetamide, urea and N-methylurea. The paper also presents a comparison of these parameters at the changes in the structure of amide mols.

Journal of Chemical Thermodynamics published new progress about Density. 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

Neuwald, Isabelle published the artcileFilling the knowledge gap: A suspect screening study for 1310 potentially persistent and mobile chemicals with SFC- and HILIC-HRMS in two German river systems, Related Products of isoquinoline, the main research area is persistent mobile chem supercritical fluid chromatog surface water; Drinking water; Groundwater; LC-MS; PMT-substances; Wastewater; Water cycle.

Persistent and mobile chems. (PM chems.) were searched for in surface waters by hydrophilic interaction liquid chromatog. (HILIC) and supercritical fluid chromatog. (SFC), both coupled to high resolution mass spectrometry (HRMS). A suspect screening was performed using a newly compiled list of 1310 potential PM chems. to the data of 11 surface water samples from two river systems. In total, 64 compounds were identified by this approach. The overlap between HILIC- and SFC-HRMS was limited (31 compounds), confirming the complementarity of the two methods used. The identified PM candidates are characterized by a high polarity (median logD -0.4 at pH 7.5), a low mol. weight (median 187 g/mol), are mostly ionic (54 compounds) and contain a large number of heteroatoms (one per four carbons on average). Among the most frequently detected novel or yet scarcely investigated water contaminants were cyanoguanidine (11/11 samples), adamantan-1-amine (10/11), trifluoromethanesulfonate (9/11), 2-acrylamido-2-methylpropanesulfonate (10/11), and the inorganic anions hexafluorophosphate (11/11) and tetrafluoroborate (10/11). 31% of the identified suspects are mainly used in ionic liquids, a chem. diverse group of industrial chems. with numerous applications that is so far rarely studied for their occurrence in the environment. Prioritization of the findings of PM candidates is hampered by the apparent lack of toxicity data. Hence, precautionary principles and minimization approaches should be applied for the risk assessment and risk management of these substances. The large share of novel water contaminants among these findings of the suspect screening indicates that the universe of PM chems. present in the environment has so far only scarcely been explored. Dedicated anal. methods and screening lists appear essential to close the anal. gap for PM compounds

Water Research published new progress about Fillers. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Manship, Tim D. published the artcileAn Improved Synthesis of the Insensitive Energetic Material 3-Amino-5-Nitro-1,2,4-triazole (ANTA), HPLC of Formula: 1455-77-2, the main research area is amino nitro triazole potassium superoxide oxidation heating.

This work shows the ability of a readily-available oxidizer to achieve the selective oxidation of 3,5-diamino-1,2,4-triazole (DAT) to 3-amino-5-nitro-1,2,4-triazole (ANTA) in high yields. This strategy reduces the synthesis of this important energetic material and synthon down to a single step. Anal. was conducted on the product and confirmed that the product was indeed ANTA. The yield, safety, and economics of this process are all superior to the current state-of-the-art two-step multi-pot procedure.

Propellants, Explosives, Pyrotechnics published new progress about Heating. 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

Liu, Min published the artcileExtraction of Natural Products by Direct Formation of Eutectic Systems, Product Details of C2H6N2O, the main research area is natural product extraction eutectic.

A eutectic system forms when two or more substances reorganize into a superlattice that has a lower m.p. than each of the individual components. Deep eutectic solvents (DESs) are environmentally friendly solvents often used for the dissolution, extraction, and separation of chem. compounds Instead of using DESs for extraction, hydrogen bond acceptors (HBAs) or hydrogen bond donors (HBDs) can be used to form a deep eutectic system (DESys) directly with the target compound for one-step dissolution and extraction The feasibility of direct formation of a DESys for high efficiency extraction was demonstrated with turmeric as the extraction target. The data showed that the target compounds indeed directly interacted with HBAs (and for other compounds, HBDs), which increases process efficiency and reduces the time required for target compounds to compete with another HBD (or HBA) to form hydrogen bonds. In addition, the results showed that the target compounds have different physicochem. properties in DESys and DES, which resulted in different anal. behaviors of the targets. This research may lead to changes in how eutectic systems are used and the development of new applications based on the formation of DESys.

ACS Sustainable Chemistry & Engineering published new progress about Eutectics. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Product Details of C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Velo-Gala, Inmaculada published the artcileIonic X-ray contrast media degradation in aqueous solution induced by gamma radiation, Application of Diatrizoic Acid, the main research area is ionic x ray contrast media degradation gamma radiation.

The objective of this study was to analyze the effectiveness of gamma irradiation to transform diatrizoate, DTZ, (contrast medium) in aqueous solution determining the role of oxidizing and reducting species on DTZ degradation The mechanisms involved in DTZ degradation have also been studied. Removal of 91.9% of the diatrizoate was achieved at a dose of 1000 Gy at initial concentration of 25 mg/L. The degradation rate depends on the initial concentration The dose constant is independent of the dose rate in the studied range of 3.83-1.06 Gy/min and slightly depends on solution pH in the interval pH 2.0-10.0. Results obtained show that low H2O2 concentrations increase the efficacy of the process, and high concentrations markedly decrease the dose constant The reaction constant of diatrizoate with the hydrogen radical was determined, obtaining a kH[rad] (DTZ) value of (2.2 ± 0.5) × 109 M-1 s-1. DTZ irradiation byproducts have been determined by HPLC-MS and an oxidation/reduction mechanism has been proposed. Three possible degradation pathways based on the major byproducts found at different doses have been proposed. Moreover, the results obtained indicated a further possible compound degradation pathway, which is based on decarboxylation by hydrogen radical or HO· radical with a subsequent attack by hydroxyl radicals against the ketone group.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Gamma ray. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Application of Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Forrez, Ilse published the artcileBiogenic metals for the oxidative and reductive removal of pharmaceuticals, biocides and iodinated contrast media in a polishing membrane bioreactor, Name: Diatrizoic Acid, the main research area is biogenic metal oxidation reduction pharmaceutical biocide polishing membrane bioreactor; biocide iodinated contrast media.

Pharmaceutical and personal care products, biocides and iodinated contrast media (ICM) are persistent compounds, which appear in ng to μg L-1 in secondary effluents of sewage treatment plants (STPs). In this work, biogenic metals manganese oxides (BioMnOx) and bio-palladium (Bio-Pd) were applied in lab-scale membrane bioreactors (MBR) as oxidative and reductive technologies, resp., to remove micropollutants from STP-effluent. From the 29 substances detected in the STP-effluent, 14 were eliminated in the BioMnOx-MBR: ibuprofen (>95%), naproxen (>95%), diuron (>94%), codeine (>93%), N-acetyl-sulfamethoxazole (92%), chlorophene (>89%), diclofenac (86%), mecoprop (81%), triclosan (>78%), clarithromycin, (75%), iohexol (72%), iopromide (68%), iomeprol (63%) and sulfamethoxazole (52%). The putative removal mechanisms were the chem. oxidation by BioMnOx and/or the biol. removal by Pseudomonas putida and associated bacteria in the enriched biofilm. Yet, the removal rates (highest value: 2.6 μg diclofenac L-1 d-1) need to improve by a factor 10 in order to be competitive with ozonation. ICM, persistent towards oxidative techniques, were successfully dehalogenated with a novel reductive technique using Bio-Pd as a nanosized catalyst in an MBR. Iomeprol, iopromide and iohexol were removed for >97% and the more recalcitrant diatrizoate for 90%. The conditions favorable for microbial H2-production enabling the charging of the Pd catalyst, were shown to be important for the removal of ICM. Overall, the results indicate that Mn oxide and Pd coupled to microbial catalysis offer novel potential for advanced water treatment.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yang, Jie published the artcileSurface modification of core-shell structured ZIF-67@Cobalt coordination compound to improve the fire safety of biomass aerogel insulation materials, Quality Control of 1455-77-2, the main research area is zeolitic imidazolate framework cobalt coordination compound surface modification; biomass aerogel fire safety thermal insulation property.

Biomass materials are considered to be excellent candidates to replace petroleum-based materials, but inherent flammability limits their applications. In this work, biomass aerogel (BA) was prepared by freeze-drying method from sodium alginate (SA) and polyvinyl alc. (PVA). To improve fire safety of BAs, a core-shell structured ZIF-67@cobalt coordination compound was successfully synthesized, which was surface functionalized by 3,5-diamino-1,2,4-triazole and 9,10-dihydro-9-oxo-10-phospho-diphenyl-10-oxide (DOPO), named as DOPO-NH2-ZIF-67. The addition of DOPO-NH2-ZIF-67 (2 wt%) outstandingly improved fire safety of BA, in contrast to neat BA, peak heat release rate, peak smoke production rate, and total smoke production were reduced by 66.6%, 85.10%, and 72.76%, resp. Furthermore, the incorporation of ZIF-67 and its derivatives has no adverse effect on the thermal insulation performance of BA composites and significantly improved their compressive strength from 0.27 MPa to 1.76 MPa. Preparation of core-shell structured ZIFs rich in active groups furnishes a conceivable way to synthesize an effective flame retardant, and a prospective method for the fabrication of aerogel insulation materials with green and economical additive-free technol. is proposed.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Aerogels. 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

Yepes, Andres F. published the artcileDiscovery of novel donepezil-M30D hybrids with neuroprotective properties for Alzheimers disease treatment, Category: isoquinoline, the main research area is Alzheimers disease mol hybrid neuroprotective pharmacokinetics.

Herein, we designed and synthesized a novel family of mol. hybrids based on the pharmacophoric combination strategy, joining key pharmacophoric features from donepezil and M30D with neuroprotector effects, aiming at obtaining promising medicinal scaffolds for AD treatment. The neuroprotective profile of novel donepezil-M30D hybrids was evaluated by combining the glutamate excitotoxicity assay in neural cells, cytosolic calcium imaging, and through neuron/astrocyte coculture after glutamate exposure. Our results revealed that novel hybrids 6b, 6d, 6g and 6h highlighted for their neuroprotector potency against glutamate-induced excitotoxicity. Specifically, 6d treatment protected cortical neurons treated with an excitotoxic glutamate stimuli recovering calcium dynamics. Likewise, treatment with the 6d hybrid prevented neuronal death and astroglia reactivity in a coculture model of glutamate excitotoxity. Computational simulations and exptl. anal. would suggest that the neuroprotective effects of active compounds could be related to blockade of NMDA channel pore. Optimal pharmacokinetics properties were founded for the most active hybrids involving a remarkable in vitro human plasma stability, as well as suitable in silico ADME profile. In summary, hybridization of key pharmacophoric features from M30D and donepezil provide biol. active compounds that could be used as promising scaffolds for the design of future plasma-stable neuroprotective agents to fight Alzheimers disease (AD).

Medicinal Chemistry Research published new progress about Affinity. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem