Dual role of flower-like Fe3O4/Ag microstructure in electrocatalytic detection and catalytic reduction of 4-nitrophenol

Materials Science in Semiconductor Processing, Journal Year: 2023, Volume and Issue: 160, P. 107441 - 107441

Published: March 15, 2023

Language: Английский

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4,6-Diamino-2-thiopyrimidine-based Cobalt Metal Organic Framework (Co-DAT‐MOF): green, efficient, novel and reusable nanocatalyst for synthesis of multicomponent reactions

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: May 9, 2023

In this study, Co-DAT-MOF powder was prepared via the solvothermal method using 4, 6-diamino-2-thiopyrimidine as organic linker and Co(NO3)2·6H2O. The synthesized catalysts are characterized XRD, FT-IR, TGA, SEM, BET, NH3-TPD, ICP-OES techniques. SEM analysis clearly indicated formation of nanosheet microspheres. NH3-TPD-MS employed a means identifying various strengths acid sites their relative abundance in an attempt to explain effect catalyst surface sites. We identified new acidic feature catalyst, related presence desorption peaks NH3-TPD profiles. activity for synthesis multicomponent reactions correlates with lewis acidity. addition, exhibited excellent performance pyrroloacridine-1(2H)-one chromeno [2, 3- d] pyrimidin-8-amines, well good reusability recyclability.

Language: Английский

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First Principle Investigations of Cesium Based Cubic CsSiX₃ (X = Cl and F) Perovskites for Solar Conversion Applications: A DFT Study

International Journal of Quantum Chemistry, Journal Year: 2024, Volume and Issue: 124(19)

Published: Sept. 23, 2024

ABSTRACT The use of solar water‐splitting technology is anticipated to reduce the disparity between demand and consumption energy. Herein, CASTEP software used investigate perovskite CsSiX 3 (X = Cl F) materials by applying GGA‐PBE exchange–correlation functional. According structure properties, compounds possess a cubic “pm3m” using space group 221. direct band gaps in are 1.04 1.07 eV, respectively. Measures density states partial (PDOS) being utilized determine degree electron localization several bands. compounds' optical characteristics examined altering their relation dielectric function (DF) scales pertinent peak. our results, mechanical properties show that CsSiCl brittle (0.13, 045) CsSiF ductile (0.32, 2.52) stable with covalent bonds. Compounds modulus elastic constants { B (8.259, 52.375), E (8.110, 55.082), G (18.331, 20.790)} C 11 (13.766, 73.566), 12 (5.506, 41.780), 44 (10.763, 24.052)} found, according properties. Therefore, such can be for photovoltaic light absorption visible spectrum. These offer wide range possible uses sensing conversion because combine effectively.

Language: Английский

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Recent Advances on Multicomponent Synthesis of Pyranopyrazoles Using Magnetically Recoverable Nanocatalysts

Polycyclic aromatic compounds, Journal Year: 2023, Volume and Issue: 44(7), P. 4932 - 4978

Published: Sept. 13, 2023

AbstractThe synthesis of heterocyclic compounds is always one the most important challenges among synthetic chemists. Pyranopyrazoles are an class that a rich source biologically molecules. These derivatives present as key structures in natural products, bioactive, and biological So far, many catalytic systems methods have been reported for these compounds. However, pyranopyrazoles through multicomponent reactions great importance, especially from point view green chemistry. During last decade, use magnetic materials catalysts organic compounds, heterocycles, has created huge revolution The easy fast separation nanocatalysts using only external magnet advantage this type catalyst, addition to complete catalyst field, ability be reused, which leads cost reduction savings. This paper covers applications magnetically recoverable nanoparticles pyranopyrazole derivatives. In review, we discussed on detials conditions well presented mechanisms their preparation presence nanomagnetic reusable catalysts.Keywords: Pyranopyrazolesmagnetic nancatalystsmagnetic seperationmulticomonent reactionssynthetic chemistry Disclosure statementNo potential conflict interest was by author(s).

Language: Английский

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Electrochemical Oxidative Carbonylation of NH-Sulfoximines

Organic Letters, Journal Year: 2023, Volume and Issue: 25(41), P. 7529 - 7534

Published: Oct. 11, 2023

The electrochemical synthesis of N-aroylsulfoximines features the use tetra-n-butylammonium iodide (TBAI) as medium and a broad substrate scope, thus affording wide range N-aroylated sulfoximines in moderate to good yields. advantages this strategy are augmented by mild reaction conditions that external oxidant-free, ligand-free, easy scale up gram scale. Both control experiments mechanistic studies revealed whole process proceeded through palladium (II/IV/II) catalytic cycle.

Language: Английский

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A Lithiophilic Artificial Li3p Interphase with High Li-Ion Conductivity Via Solid-State Friction for Lithium Metal Anodes

Published: Jan. 1, 2025

Language: Английский

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A Lithiophilic Artificial Li3P Interphase with High Li-Ion Conductivity via Solid-State Friction for Lithium Metal Anodes

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 1930 - 1930

Published: April 24, 2025

Interfacial modification strategies for lithium metal anodes have emerged as a promising method to improve cycling stability, suppress dendrite growth, and increase Coulombic efficiency. However, the reported chemical synthesis methods lead side reactions products, which hinder their electrochemical performance. In this study, we propose novel facile red phosphorus-assisted solid-state friction in situ fabricate uniform Li3P interphase directly on surface of metal. Interestingly, as-formed artificial with high ionic conductivity affinity features significantly enhanced interfacial stability kinetics. The symmetric cells based Li@P achieved prolonged lifespan, over 1000 h, at 1 mA/cm2 low polarization. When paired high-loading LiFePO4 cathode (10.5 mg/cm2), Li@P||LiFePO4 full cell retained 88.9% its capacity after stable 550 cycles 2 C further demonstrated excellent performance Li@P‖LiCoO2 pouch cell. This study provides an efficient scalable strategy stabilizing anodes, expanding new ideas development next-generation high-energy-density batteries.

Language: Английский

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NHPI-catalyzed electrochemical C–H alkylation of indoles with alcohols to access di(indolyl)methanes via radical coupling

Organic Chemistry Frontiers, Journal Year: 2022, Volume and Issue: 9(24), P. 6861 - 6868

Published: Jan. 1, 2022

The present indirect electrochemically mediated radical protocol outperforms the traditional Friedel–Crafts route with a broad substrate scope and functional group tolerance, as well facile gram-scale synthesis without metal contamination.

Language: Английский

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Impact of ferromagnetic nanoparticles on convectively heated radiative flow of Williamson nanofluid

Journal of the Indian Chemical Society, Journal Year: 2023, Volume and Issue: 100(2), P. 100915 - 100915

Published: Jan. 28, 2023

Language: Английский

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Synthesis of poly(methacrylic acid)/functionalized carbon nanotubes nanocomposite modified electrode for electrochemical sensitive determination of acrylamide in food sample

International Journal of Electrochemical Science, Journal Year: 2023, Volume and Issue: 18(3), P. 100025 - 100025

Published: Feb. 10, 2023

Poly(methacrylic acid) and functionalized carbon nanotubes nanocomposite modified glassy electrodes (PMAA, f-CNTs, GCE) have been synthesized for electrochemically sensitive determination of acrylamide (AA) in food samples. A study the structure morphology using XRD FE-SEM analyses showed that f-CNTs were completely covered by PMAA molecules nanocomposite. Electrochemical studies on AA PMAA/f-CNTs/GCE sensors CV DPV techniques PMAA/f-CNTs enhanced sensitivity selectivity an electrochemical sensor due to synergetic effect PMAA. Results indicated a 0.0171 µA/μM, detection limit 15 μM linear range 0–2400 μM. applicability verification as prepared real samples potato crisps notable conformity between results ELISA assays, relatively small values RSD (3.41–5.11 %) recovery (97.50–99.00 analysis acceptable which corroborated appropriate validation content

Language: Английский

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