Month: December 2022

Hu, Kaibo published the artcileRemoval of aluminum to obtain high purity gadolinium with pyridinium-based ionic liquids, Formula: C8H15ClN2, the publication is Hydrometallurgy (2022), 105930, database is CAplus.

As an associated element, aluminum (Al(III)) has a neg. effect on the purity of rare earth gadolinium (Gd(III)). Three pyridinium-based ionic liquids ([(CH₂)nCOOHpyr][NTf₂], n = 3, 5, 7) were proposed as the solvent in liquid-liquid extraction for separation of the Al(III) impurity from Gd(III) in this study. The effect of pH value of the aqueous phase, diluent type, extraction time and temperature on the extraction separation of Al³⁺ from GdCl₃ solution were investigated systemically. The results show that the separation factor β of Al(III)/Gd(III) is up to 340 by adjusting the pH value of the aqueous phase which is higher than the values of other reported systems, and the removal efficiency of Al(III) could reach 97.1%, with the recovery efficiency of Gd(III) of 85.6% through one-time extraction using a mixture of ionic liquids[(CH₂)₇COOHpyr][NTf₂]-[C₄mim][NTf₂] as the extractant. The slope anal. and IR spectroscopic characterization indicated that the extraction mechanism of Al(III) by the [(CH₂)₇COOHpyr][NTf₂]-[C₄mim][NTf₂] system follows the cation exchange mechanism. After the extraction, 0.08 mol/L hydrochloric acid aqueous solution was used to strip Al(III) from the ionic liquid phase, and complete recovery of Al(III) could be realized. The extraction efficiency of the [(CH₂)₇COOHpyr][NTf₂]-[C₄mim][NTf₂] system for separation of Al(III) is still more than 97.8% after recycling for 8 cycles.

Hydrometallurgy published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Formula: C8H15ClN2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Zhang, Qiu-Gen published the artcileOne-pot synthesis of imidazole derivatives under solvent-free condition, Formula: C19H14N2, the publication is Asian Journal of Chemistry (2012), 24(10), 4611-4613, database is CAplus.

A convenient and environment-friendly solvent-free procedure was developed for the one-pot synthesis of imidazoles by multicomponent cyclocondensation of 1,2-phenylenediamine or benzil with aromatic aldehydes and NH₄OAc. On comparing the new method with the classical reaction condition, this new synthetic method shows many advantages, such as high yields, easy set-up, and mild reaction conditions.

Asian Journal of Chemistry published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C11H16BNO2, Formula: C19H14N2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Wang, Yuanyuan published the artcileGreen fabrication of an ionic liquid-activated lignocellulose flame-retardant composite, Recommanded Product: 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, the publication is Industrial Crops and Products (2022), 114602, database is CAplus.

A flame-retardant lignocellulose composite was fabricated via ionic liquid activation assisted by hot-pressing. To obtain a dilated, isolated surface, lignocellulose was pretreated with an ionic liquid After modification with an ionic liquid, micro/nanofibrils appeared on the surface of lignocellulose. Crosslinking between micro/nanofibrils was beneficial for the deposition of inorganic particles. Ammonium polyphosphate and aluminum hydroxide particles were deposited on the surface of lignocellulose via hydrogen bonding and van der waals adsorption, forming a flame-retardant layer. The ionic liquid-activated flame-retardant lignocellulose composite exhibited better flame retardancy and higher mech. strength than those of pure lignocellulose. Compared to those of pure lignocellulose, the heat release rate (HRR), total heat release (THR) and total smoke production (TSP) of lignocellulose-based ammonium polyphosphate/aluminum hydroxide (LPA) composites decreased by 78.5%, 35.71% and 88.24%, resp. The LPA composites had a mech. strength of 48.5 MPa, which was 33.99% higher than that of pure lignocellulose. This method provides a new approach for lignocellulose-based flame-retardant materials.

Industrial Crops and Products published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C13H10F2, Recommanded Product: 3-Butyl-1-methyl-1H-imidazol-3-ium chloride.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Wang, Hui published the artcileEffect of critical micelle concentration of imidazole ionic liquids in aqueous solutions on the wettability of anthracite, Synthetic Route of 79917-90-1, the publication is Energy (Oxford, United Kingdom) (2022), 239(Part_B), 122088, database is CAplus.

In this study, the influence of ionic liquids (ILs) on the microstructure and wetting behavior of anthracite is explored. ¹H NMR and conductometry are used to determine the critical micelle concentration (CMC) for the aggregation of the ILs in an aqueous solution XPS and zeta potential are used to analyze the changes in functional groups on the surface of coal treated with ILs and their effects on the wetting process. The results show that with an increase in the concentration of the ILs, the chem. shift of the end proton of the alkyl side chain moves forward to the high field, and the chem. shift value decreases. 1-Butyl-3-methylimidazolium chloride [Bmim][Cl] and 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF₄] in aqueous solution attain the CMC at 0.93 mol/L and 0.95 mol/L, resp. XPS results show that at the CMC of [Bmim][Cl], the relative content of oxygen-containing functional groups (C-O-, C=O, COO-) is higher, and the wetting effect is better. When the concentration of [Bmim][BF₄] in aqueous solution is 0.5 mol/L, it has a low hydrophobic group (C-C/C-H) content and strong wetting ability to coal dust. At the CMC, [Bmim][Cl] aqueous solution has an inhibiting effect on the wetting behavior, while [Bmim][BF₄] has the opposite effect.

Energy (Oxford, United Kingdom) published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C25H47NO8, Synthetic Route of 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Wang, Yue published the artcileNovel phosphorescent triptycene-based Ir(III) complexes for organic light-emitting diodes, Recommanded Product: 1,2-Diphenyl-1H-benzo[d]imidazole, the publication is Dalton Transactions (2019), 48(43), 16289-16297, database is CAplus and MEDLINE.

A series of charge-neutral cyclometalated iridium(III) complexes (1-3 and 5-7) containing triptycene-substituted ligands (tbt and tpbi) and two parent complexes (4 and 8) were synthesized and characterized. The crystal structures indicated that π-π stacking interactions existed in ligand tbtH, but not in complex 6. However, a large intramol. repulsion was found in complex 6. These triptycene-based complexes exhibited good thermal stability, which was higher compared with that of the parent complexes. These complexes showed green to yellow emission with peaks that ranged from 503 to 563 nm. The introduction of the rigid non-conjugate triptycene skeleton caused a slight emission red shift (<25 nm), but a significant increase in the PLQYs (>47%) was observed The electroluminescent devices employing 2 and 6 as phosphors displayed impressive performance improvements and low efficiency roll-off because of the higher PLQYs and HOMO levels of these triptycene-based complexes. The maximum current and external quantum efficiencies of the devices based on complexes 2 and 6 were 41.7 cd A^-1, 11.9% and 41.2 cd A^-1, 12.6%, resp., which were about 31% higher than that of the devices based on the parent complexes 4 and 8. This work provides a novel approach to develop highly efficient phosphors with a triptycene skeleton.

Dalton Transactions published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C11H12O4, Recommanded Product: 1,2-Diphenyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Yu, Min published the artcileHPLC peak positioning of omeprazole sulphone and esomeprazole sodium, Formula: C17H18N3NaO3S, the publication is Zhongguo Kangshengsu Zazhi (2012), 37(10), 773-775, 788, database is CAplus.

The eluotropic series of the main component esomeprazole sodium and its impurity omeprazole sulfone in different HPLC conditions were determined The HPLC methods adopted Welch Materials Xtimate-C₈ column (4.6mm×250mm, 5 μm), Phenomenex b-sil- C₈ column (4.6mm×250mm, 5 μm), Zorbax Eclipse XDB-C₈ column (4.6mm×250mm, 5 μm), Kromasil-C₈ column (4.6mm×150mm, 5 μm), Spherisorb-C₈ column (4.6mm×150 mm, 5 μm), Welch Materials Welchrom-C₈ column (4.6mm×250mm, 5 μm), 0.01 mol/L disodium hydrogen phosphate solution (adjust pH to 7.6 with phosphoric acid)-acetonitrile (67:33) as mobile phase, the flow rate was 1.0 mL per min. The detection wavelength was 280 nm. And the injection volume was 20 μL. The eluotropic series of esomeprazole sodium and omeprazole sulfone in HPLC were influenced by the column, not by the other conditions. The main influencing factor for the eluotropic series of esomeprazole sodium and omeprazole sulfone in HPLC was column.

Zhongguo Kangshengsu Zazhi published new progress about 161796-78-7. 161796-78-7 belongs to imidazoles-derivatives, auxiliary class Membrane Transporter/Ion Channel,Proton Pump, name is Sodium (S)-6-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)benzo[d]imidazol-1-ide, and the molecular formula is C3H5F3O, Formula: C17H18N3NaO3S.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Chen, Xuemeng published the artcileTransition-Metal-Catalyzed Transformation of Sulfonates via S-O Bond Cleavage: Synthesis of Alkyl Aryl Ether and Diaryl Ether, Recommanded Product: 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, the publication is Organic Letters (2019), 21(22), 8879-8883, database is CAplus and MEDLINE.

The catalytic conversion of sulfonates, a versatile class of pharmaceutical intermediates, is usually based on C-O bond cleavage. In this paper, however, a rare transformation of sulfonates R¹SO₂OR² [R¹ = 2-pyridyl, 3-methyl-2-pyridyl, 5-trifluoromethyl-2-pyridyl, etc.; R² = Ph, 2-naphthyl, 3-quinolyl, Ph(CH₂)₃, 1-heptyl, 2-adamantyl, etc.] via S-O bond cleavage catalyzed by transition metal. Alkyl sulfonates underwent an intramol. desulfitative C-O coupling to form aryl alkyl ethers in the presence of a nickel catalyst, whereas aryl sulfonates performed similarly under palladium complex catalysis to give diaryl ethers. This transformation could tolerate a wide range of functionalities. Controlled experiments revealed that the 2-pyridyl group is necessary to promote the reaction as designed. Crossover experiments proved that this transformation might proceed partly in an intermol. pathway.

Organic Letters published new progress about 258278-25-0. 258278-25-0 belongs to imidazoles-derivatives, auxiliary class Achiral NHCs Ligands, name is 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, and the molecular formula is C27H39ClN2, Recommanded Product: 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Zhang, Shunlin published the artcileThe Chemistry of the Passivation Mechanism of Perovskite Films with Ionic Liquids, SDS of cas: 79917-90-1, the publication is Inorganic Chemistry (2022), 61(12), 5010-5016, database is CAplus and MEDLINE.

Passivation of perovskite films by ionic liquids (ILs) improves the performance (efficiency and stability) of perovskite solar cells (PSCs). However, the role of ILs in the passivation of perovskite films is not fully understood. Here, we report the reactions of commonly used ILs with the components of perovskites. The reaction of ILs with perovskite precursors (PbI₂ and methylammonium iodide or formamidinium iodide) in a 1:1:1 molar ratio affords one-dimensional (1D) salts composed of the IL cation interspersed along infinite 1D polymeric [PbI₃]^–_n chains. If the IL is applied in excess, the resulting crystal is composed of six cations surrounding a discrete [Pb₃I₁₂]^6- cluster. All the isolated salts were unambiguously characterized by single-crystal X-ray diffraction anal., which also reveals extensive hydrogen-bonding interactions.

Inorganic Chemistry published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C13H18N2, SDS of cas: 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Wang, Qiang published the artcileEfficient absorption of low partial pressure SO₂ by deep eutectic solvents based on pyridine derivatives, Application of 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, the publication is Chemical Engineering Research and Design (2022), 36-44, database is CAplus.

Efficient and reversible absorption of SO₂ by deep eutectic solvents (DESs) has drawn much attention in recent years. In this work, a new type of deep eutectic solvents (DESs) were synthesized via pyridine derivatives, nicotinamide, aminopyridines and hydroxypyridines, as the hydrogen bond donors (HBDs) with common quaternary ammonium salt ionic liquids (ILs) as hydrogen bond acceptors (HBAs). The studied DESs exhibited an attractive absorption behavior for SO₂, especially for low concentration SO₂. The 1-allyl-3-methylimidazolium chloride (AmimCl)/2-aminopyridine (2-NH2Py) (2:1) and 1-butyl-3-methylimidazolium chloride (BmimCl)/3-aminopyridine (3-NH2Py) (2:1) could capture 0.273 and 0.223 g SO₂/g DES at 293 K and 1.0 kPa, resp., surpassing that of most DESs and ILs in the present literature. The influence of DES composition, temperature and pressure on SO₂ absorption performance was systematically investigated. Moreover, the absorption mechanism studied by NMR (NMR) and Fourier transform IR (FT-IR) spectroscopies indicated that the efficient absorption of SO₂ was ascribed to the chem. interaction between the pyridine nitrogen atom and SO₂.

Chemical Engineering Research and Design published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C15H12O8, Application of 3-Butyl-1-methyl-1H-imidazol-3-ium chloride.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Lukasik, E. published the artcileSynthesis of 1-arylbenzimidazoles and dibenzo[b,e][1,4]diazepines from 2-(arylamino)aryliminophosphoranes, Synthetic Route of 2622-67-5, the publication is ARKIVOC (Gainesville, FL, United States) (2016), 67-85, database is CAplus.

2-(Arylamino)aryliminophosphoranes, easily obtained from 2-nitrosodiarylamines,were found to be convenient starting materials for simple reactions with common acylating reagents such as acid chlorides and the Vilsmeier reagent. The reactions allowed for the synthesis of 1,2-disubstituted benzimidazoles or dibenzo[b,e][1,4]diazepines, depending on the substituents on the 2-arylamine nitrogen atom.

ARKIVOC (Gainesville, FL, United States) published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Synthetic Route of 2622-67-5.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem