Publications related to Solvents (10,000)
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The indolenine styrylcyanine dye and its carboxyl-labeled derivative were synthesized using condensation of the corresponding indolenines with 4-(dimethylamino) benzaldehyde in the presence of an alkaline catalyst. The spectral-luminescent properties of studied dyes in organic solvents, the aqueous solution (pH 7.9), and the presence of different b...
De modo geral, um solvente a ser utilizado em processos de extração de bioprodutos deve possuir (i) alta eficiência de recuperação; (ii) preço competitivo; e (iii) toxicidade relativamente baixa ao corpo humano e ao meio ambiente. Este trabalho visa desenvolver uma estrutura para a avaliação de processos de extração usando solventes líquidos, com b...
Fenofibrate is a lipid lowering drug used in the treatment of hyperlipidemia, which is not soluble in water and lower absorption in gastric fluid. In order to improve the solubility and oral absorption of the drug in gastric fluid and to enhance its dissolution rate solid dispersions evaluated. Solid dispersions of Fenofibrate were prepared using P...
To investigate the effects of the non-Newtonian properties of solvents on particle suspension rheology (non-Newtonian property and viscosity), we analyzed suspension flows with different solvent characteristics. We used the power-law model to express the non-Newtonian properties of solvents. The power-law index of the suspension was denoted as n su...
The purpose was to determine the solubility data of guanidinium 5,5’-azotetrazolate (GAzT) in various pure solvents including methanol, ethanol, acetone, acetonitrile, ethyl acetate, 1,4-dioxane, N,N-dimethylformamide (DMF), and Dimethyl sulfoxide (DMSO) at temperatures T = 25oC, 50oC and pressure P = 1 atm. Solubility data of guanidinium 5,5’- azo...
We introduce quantum algorithms able to sample equilibrium water solvent molecules configurations within proteins thanks to analog quantum computing. To do so, we combine a quantum placement strategy to the 3D Reference Interaction Site Model (3D-RISM), an approach capable of predicting continuous solvent distributions. The intrinsic quantum nature...
Sustainable Bioactive Dyeing ofTextiles: A Novel Strategy UsingBacterial Pigments, NaturalAntibacterial Ingredients, andDeep Eutectic Solvents
Herein, a simple, solvent‐free method to fabricate polymer‐encapsulated halide perovskite photoconductors is described. Dry mechanochemical synthesis is used to prepare CsPbBr3 in the presence of poly(butyl methacrylate) (PBMA). The resulting composite powder is then heated and pressed into a free‐standing disk with a thickness controlled by a meta...
Polyethylene terephthalate (PET) tape is widely used by well-known lithium-ion battery manufacturers to prevent electrode stacks from unwinding during assembly. PET tape is selected since it has suitable mechanical and electrical properties, but its chemical stability has been largely overlooked. In the absence of effective electrolyte additives, P...
In the present work, comparisons of non-isothermal crystallization kinetics between Fe20Co20Ni20Cr20(P0.45B0.2C0.35)20 high-entropy metallic glass (HEMG) and the predecessor Fe75Cr5P9B4C7 metallic glass (MG) were performed with X-ray diffraction and differential scanning calorimetry approaches. The HEMG possesses a harsher crystallization process c...
Organic solvent nanofiltration (OSN) is a membrane separation method that has gained much interest due to its promising ability to offer an energy-lean alternative for traditional thermal separation methods. Industrial acceptance, however, is held back by the slow process of membrane screening based on trial and error for each solute-solvent couple...
A facile and green one-pot synthesis of AChE quinazolinone inhibitors was developed using microwave irradiation under solvent free conditions. Quinazolinones were synthesized from 2-aminobenzamide derivatives and various alcohols such as benzyl alcohol derivatives and butanol using economical commercially available copper as a catalyst in the prese...
Five coordination polymers [TM ¹ (absa)(H 2 O) 4 ] n and [TM ² (absa)(bipy)(H 2 O)] n [TM ¹ = Zn ( 1 ), Co ( 2 ); TM ² = Zn ( 3 ), Co ( 4 ), Cu ( 5 ); Na 2 absa = 5,5′-azobissalicylic acid disodium salt; bipy = 4,4′-bipyride] were synthesized by solvent evaporation under a magnetic field. It is evident that magnetic fields bring significant and not...
This work reports a simple, low-cost, and environmentally friendly method to synthesize Ni-Co alloy nanoparticles (Ni-CoNPs) onto a glassy carbon electrode, GCE, and its use towards the efficient urea electrooxidation in basic aqueous media. Ni-CoNPs were directly electrodeposited onto the GCE surface, GCE/Ni-CoNPs by a single potentiostatic step,...
We demonstrate that a cavitation bubble initiated by a Nd:YAG laser pulse below breakdown threshold induces crystallization from supersaturated aqueous solutions with supersaturation and laser-energy-dependent nucleation kinetics. Combining high-speed video microscopy and simulations, we argue that a competition between the dissipation of absorbed...
This study examines the stability and protonation properties of four potential azahomocubanes. Through high-level ab initio computations, we find that 9-azahomocubane is the most stable isomer, closely followed by 5-azahomocubane, 1-azahomocubane, and 2-azahomocubane. However, understanding the stability of the systems with a nitrogen atom incorpor...
The natural asphalt rock of Buton Island, known as Asbuton, has varying bitumen and moisture contents. This study was conducted in Nambo village, Lasalimu sub-district, Buton island. This area is composed of Aluvium and Limestone at Tondo and Winto Formations. Testing bitumen and moisture contents using the sokhlet method which serves to extract co...
In this DFT study, we have evaluated the reaction mechanism of lithium polysulfide (Li2S6) with the electrolyte additive methyl trifluoroacetate (CH3TFA) in the gas and solvent (dimethoxyethane (DME)) phase at room temperature (298 K) by locating transition states (TS) for the methyl group transfer from CH3TFA to Li2S6, which is reported to produce...
This study describes the synthesis of four novel compounds and their application as novel amine free accelerators for nitrile-butadiene rubber (NBR) vulcanization. The compounds were synthesized from Morita–Baylis–Hillman acetates and potassium dithiocarbimate salts using acetone:water (1:1, v:v) as the solvent, which produced a precipitate that wa...
Ionic liquids (ILs) are the class of materials which are purely ionic in nature and liquid at room temperature. Their remarkable properties like very low vapour pressure, non-inflammable and high heat resistance are responsible for their use as a very appealing solvent in a variety of industrial applications in place of regular organic solvents. Be...
The development of lithium‐sulfur (Li‐S) batteries is severely limited by the shuttle effect and instability of Li‐metal anode. Constructing Li‐ion S batteries (LISBs), by using more stable commercial graphite (Gr) anode instead of Li‐metal, is an effective way to realize long‐cycle‐life Li‐S batteries. However, Gr electrode is usually incompatible...
Low-temperature sintered conductive silver paste has become increasingly popular in the rapidly advancing field of printed circuits, solar panels, and integrated electronics. In order to fully utilize the high activity of silver powder to achieve better performance, more than traditional silver paste solvent is required. In this paper, 1-hexanol wa...
A series of new difluoroboronate anchored acylhydrazone (BOAHY) derivates were prepared in good yields via a simple two-step reaction starting from commercially available reagents. The spectroscopic properties of these dyes can be easily tuned through appropriate functionalization and post-functionalization. While these BOAHYs are dim in solution,...
Polygonatum sibiricum Polysaccharide (PsP) with antioxidant function is the main active component of Polygonatum sibiricum (P.sibiricum). The currently poor extraction yield and extraction methods of PsP cannot meet the application of that in food industrial production. In this research, an ultrasound-assisted extraction-deep eutectic solvents (UAE...
Caralluma tuberculata N.E. Brown is a xerophytic, perennial herb. Asclepiadaceae is the family where it originates. The species C. tuberculata has been the subject of an investigation by biologists because either the crude extracts or the purified compounds have a wide variety of biological activities such as anti-cancer, anti-diabetic, antioxidant...
The overall molecular configuration of the title compound, C 12 H 16 N 6 OS 2 ·C 3 H 7 NO, is stabilized in the solid state by intramolecular C—H...N, C—H...O, N—H...N and N—H...O interactions, forming S (5) ring motifs. In the crystal, molecules are linked to each other and solvent dimethylformamide molecules by N—H...S, N—H...O, C—H...O and C—H.....
End-tethered polyelectrolytes are widely used to modify substrate properties, particularly for lubrication or wetting. External stimuli, such as pH, salt concentration, or an electric field, can induce profound structural responses in weak polyelectrolyte brushes, which can be utilized to further tune substrate properties. We study the structure an...
Because of the specific thermodynamic properties of active pharmaceutical ingredients, the process of crystallization often meets implementation challenges in the pharmaceutical industry. Therefore, it is essential to select the appropriate method and system for the crystallization of a drug. Ceritinib, an active ingredient in the treatment of lung...
In this paper, a rapid and efficient method for the preparation of scopolamine hydrobromide with high purity was established, named as magnetic field-induced crystallization. Based on the difference in solubility between scopolamine and scopolamine hydrobromide, salifying crystallization was selected and then treated with the synergistic effect of...
Glucomannan is one of the functional components found in porang tuber. The modification of process technology is generally carried out in order to obtain optimal product characteristics according to glucomannan content from porang flour. One method that can be done to increase the glucomannan content of porang tuber is by carrying out a dry extract...
In a general sense, a solvent chosen for selective extraction must have (i) a high recovery efficiency; (ii) a competitive price; and (iii) relatively low toxicity to the human body and to the environment. Therefore, this work aims at developing a framework for assessing selective extraction processes, based on technical, economical and socioenviro...
In a general sense, a solvent chosen for selective extraction must have (i) a high recovery efficiency; (ii) a competitive price; and (iii) relatively low toxicity to the human body and to the environment. Therefore, this work aims at developing a framework for assessing selective extraction processes, based on technical, economical and socioenviro...
The use of remediated soils as end-of-life materials raises some challenges including policy and regulation, permits and specifications, technological limitations, knowledge and information, costs, as well as quality and performance associated with using them. Therefore, a set of procedures must be followed to preserve the quality and fundamental p...
El tipo de sustrato y solución nutritiva influyen en el contenido de compuestos fenólicos en plantas de consumo humano; no obstante, el tipo de solvente que se utiliza para la extracción de los compuestos fenólicos puede jugar un papel preponderante en los resultados. Los objetivos de este estudio fueron determinar la producción de compuestos fenól...
Efficient graphene production is critical for commercial applications. Liquid-phase exfoliation, one of the most promising methods for mass production of graphene, is limited by small size and low yield. By optimizing the fluid forces, we have achieved the size-controlled production of high-quality graphene. The bending and cleavage caused by the c...
Abstract—A technique is proposed for determining the partial molar volumes of gaseous substances in liquids and
the density of the resulting solutions at elevated pressure by gas-liquid chromatography. The partial molar volume
of ethylene and the density of its solutions at 298 K in a number of perhalogenated liquids at various ethylene concentrati...
The bioactive compounds and antioxidant activities of propolis extracts were investigated using subcritical water extraction (SWE). SWE was performed by varying temperature (110–200 °C) and time (10–30 min). SWE using only water as solvent successfully to extracted bioactive compounds from propolis using high-purity glass thimbles. The concentratio...
Photocatalysis is becoming increasingly important in modern chemistry for efficient multicomponent one-pot synthesis. However, predicting the results of photocatalytic reactions using artificial intelligence remains challenging, mostly due to the insufficient number of photocatalytic reactions and the incomplete information on reaction conditions i...
Coarse-grained (CG) force fields are essential for molecular dynamics simulations of biomolecules, striking a balance between computational efficiency and biological realism. These simulations employ simplified models grouping atoms into interaction sites, enabling the study of complex biomolecular systems over biologically relevant timescales. Eff...
To assess the potential risks posed to the environment and human health, analyzing pesticide residues in proso millet is important. This paper aimed to develop a modified QuEChERS method with liquid chromatography-tandem mass spectrometry (LC–MS/MS) for the analysis of 54 pesticide residues in proso millet. Parameters including the mobile phase of...
This paper presents the development of a portable device that can be used for liquid identification using the concept of Beer−Lambert law. The final device can recognize up to 30 different materials in their liquid state and provides some other useful features that can enhance its operation. The user can set a group of 30 liquids according to speci...
This study aimed to optimize the process of extracting essential oil from Eucalyptus citriodora leaves using either conventional hydrodistillation (CHD) or microwave-pretreatment hydrodistillation (MPHD), and to compare the two methods. The response surface methodology was utilized to optimize two techniques. The essential oil yield was quantified...
There is no doubt that carbon emissions are one of the greatest challenges facing humanity today. Carbon capture, utilization, and storage is an effective way to achieve carbon neutrality. However, the commonly used commercial absorbents for post-combustion captures still have some limitations such as low chemical absorption rate constants. In this...
Chirality is an omnipresent structural feature found in nature. The transfer and amplification of chirality are widely recognized phenomena. In appropriate solvents, chiral molecules can self‐assemble into diverse chiral supramolecular nanomaterials with unique properties. In the past two decades, there has been a growing number of reported chiral...
Photocatalysis is becoming increasingly important in modern chemistry for efficient multicomponent one-pot synthesis. However, predicting the results of photocatalytic reactions using artificial intelligence remains challenging, mostly due to the insufficient number of photocatalytic reactions and the incomplete information on reaction conditions i...
Costs and effectiveness of the pump and treat plant vary from plant to plant and may be a function of different process and treated water parameters. The aim of this assessment was therefore to:
➢ Collect data from different sources,
➢ Evaluate the quality of the data,
➢ Propose and test different methods for data processing and evaluation.
If succ...
![Synthesis of quinolin-imidazo[1,2-a]pyridine and...](publication/373837127/figure/fig2/AS:11431281187990647@1694484503872/Synthesis-of-quinolin-imidazo1-2-apyridine-and-quinolin-pyrido1-2-apyrimidine_Q320.jpg)
![Synthesis of quinolin-imidazo[1,2-a]quinolone derivatives 4 via...](publication/373837127/figure/fig3/AS:11431281187990648@1694484503940/Synthesis-of-quinolin-imidazo1-2-aquinolone-derivatives-4-via-one-pot-four-component_Q320.jpg)
Here, highly efficient one-pot protocols for the synthesis of structurally diverse fused N-containing heterocycles containing 2-chloroquinoline employing 1,1-bis(methylsulfanyl)-2-nitroethene, diamines, 2-chloroquinoline-3-carbaldehydes and dimedone/Meldrum's acid in green media in the absence of catalyst are reported. The current report proposes s...
The use of a deep eutectic solvent with thermo-switchable hydrophobicity properties (lidocaine: decanoic acid) is presented. Upon a gentle thermal trigger, the solvent separated into aqueous and organic layers. This system is well adapted for the CuAAC reaction using an N-heterocyclic carbene copper catalyst. An alkyne–azide cycloaddition of hydrop...
Acid-induced release of stored ions from polyacrylic acid hydrogels (with a free surface fully permeable to the ion and acid flux) was observed to increase the gel osmotic pressure that leads to rapid, temporary swelling faster than the characteristic solvent absorption rate of the gel. Here we develop a continuum poroelastic theory that quantitati...
A theory for the nonlinear dielectric response of dilute protein solutions is presented. The field-dependent dielectric function of the protein solution changes linearly with the electric field squared in the lowest order. The slope of this dependence is expressed in terms of the protein dipole moment $M_0$, its volume fraction in solution $\eta_0$...
Human carbonic anhydrase II catalyzes the reversible reaction of carbon dioxide and water to form bicarbonate and a proton. His64-mediated proton shuttling between the active site and the bulk solvent is rate limiting. Here we investigate the protonation behavior of His64 as well as its structural and dynamic features in a pH dependent way. We deri...
The title compound, C 26 H 26 N 4 O 6 ·2C 4 H 8 O, representing a bis-urea with terminal phenylalanine units, crystallized with two tetrahydrofuran (THF) molecules. The main molecule is located on a crystallographic twofold axis, while the solvent molecule is disordered over two positions, with occupancies of 0.571 (15) and 0.429 (15). The host mol...
This study explores the potential of the dumbbell solvent as a minimal model for understanding electrolyte behavior in polar solvents, in contrast to the widely-used Stockmayer model. The distinguishing feature of the dumbbell model lies in its straightforward capture of the coupling between molecular orientation and dipole rotation. Our investigat...
Hydrogels exhibit rate-dependent fracture behavior, due to solvent diffusion, rearrangement of the polymer network, and other mechanisms. To explore rate-dependent fracture behavior, a series of creep fracture experiments were performed on gelatin-based hydrogels under different controlled humidity, and load conditions. The crack tip boundary condi...
Janus membranes, thin permeable structures with chemical and geometrical asymmetric properties, show great potential in industrial separation processes. Yet the link between the micro- and macro-scale behaviours of these membranes needs to be established rigorously. Here, we develop interface conditions to describe the solvent–solute flow across Ja...
We report a palladium-catalyzed method for 4,3- or 4,1-selective alkenylamination of terminal dienes. Three component couplings proceed with alkenyl triflates and several amines, giving vicinal carboamination with a Xantphos-supported catalyst and distal difunctionalization with a phosphoramidite ligand. Experimental evidence indicates selectivity...
A series of mono- and dicationic 1,3,5-trisubstituted 2,4,6-triethylbenzenes containing pyridinium groups in combination with aminopyrimidine-/aminopyridine-based recognition units were synthesized and crystallographically studied. The combination of neutral and ionic building blocks represents a promising strategy for the development of effective...
Transdermal delivery is a non-invasive route, used as an alternative to the oral route, to administer drugs through the skin surface. One of the fields in which they are particularly used is that of pain therapy. In this treatment, transdermal patches, particularly those containing opioids, are used to complement or replace orally administered drug...
Biocatalysis can be applied in aqueous media and in different non-aqueous solutions (non-conventional media). Water is a safe solvent, yet many synthesis-wise interesting substrates cannot be dissolved in aqueous solutions, and thus low concentrations are often applied. Conversely, non-conventional media may enable higher substrate loadings but at...
In the drying process of electrodes for lithium-ion batteries, the layer structure is defined and can only be influenced slightly in the subsequent process steps. An essential point in the drying process is the fixation of the binder, ensuring both the adhesive and cohesive strength of the electrode. It is known that high drying rates lead to the s...
The NiMn2O4/graphene oxide (GO) nanocomposite material was in situ grown on the surface of a nickel foam 3D skeleton by combining the solvent method with the microwave-assisted hydrothermal method and annealing; then, its performance was investigated as a superior supercapacitor electrode material. When nickel foam was soaked in GO aqueous or treat...
In this contribution, a series of dihydroisoindolo[2,1-a]quinolin-11-ones was synthesized by a one-pot multicomponent Povarov reaction starting from anilines, alkenes (trans-anethole, methyl eugenol and indene) and 2-formylbenzoic acid. Different eutectic solvents bearing Lewis or Brønsted acids were evaluated as reaction media and catalysts for th...