Ultrahigh-Strength Textile Fiber-Supported Schiff Base Copper Complexes for Photocatalytic Degradation of Methyl Orange

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(21), С. 13077 - 13088

Опубликована: Окт. 17, 2024

An ultrahigh-strength textile fiber-supported Schiff base copper complex PEEK-SB@Cu(II) was prepared by chloromethylation and amination of a commercially available poly(ether ether ketone) (PEEK) fiber, followed functionalization acetate chelation treatment. The fibers derived from the preparation stages catalytic runs were characterized using diverse techniques to investigate these changes. Moreover, incorporated with NaBH4 presented effective photocatalytic activities for fast exhaustive degradation methyl orange in an aqueous solution rate >99% no more than 2 min. corresponding influencing factors screened confirm that process based on pseudo-first-order reaction kinetic mode, synergistic mechanism proposed interpret process. Furthermore, recyclability stability evaluated over 5 long-term storage at least months, practicability this methodology spinning basket reactor further verified.

Язык: Английский

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A new neodymium complex on renewable magnetic biochar nanoparticles as an environmentally friendly, recyclable and efficient nanocatalyst in the homoselective synthesis of tetrazoles

Nanoscale Advances, Год журнала: 2024, Номер 6(7), С. 1932 - 1944

Опубликована: Янв. 1, 2024

Inexpensive, stable, selective, and recyclable nanocatalysts, waste regeneration, utilization of safe available solvents are interest important factors in laboratory science industrial applications green chemistry. Therefore, herein, biochar nanoparticles (BNPs) were synthesized through chicken manure pyrolysis as a novel method for recycling. Then, order to improve their recyclability, the obtained BNPs magnetized using magnetic nickel nanoparticles. surface (BMNPs) was modified by (3-chloropropyl)trimethoxysilane (3-CPTMS) further neodymium Schiff-base complex immobilized on BMNPs, denoted Nd-Schiff-base@BMNPs. The supported used practical, biocompatible, commercial, reusable heterogeneous nanocatalyst. support this nanocatalyst formed from manure; therefore, it is cheap, economically viable, also compatible with principles Nd-Schiff-base@BMNPs acts selectively organic reactions can easily be recovered an external magnet reused, which This characterized wavelength-dispersive X-ray spectroscopy (WDX), scanning electron microscopy (SEM), energy-dispersive (EDS), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR), inductively coupled plasma (ICP), N

Язык: Английский

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Construction of a Dual-Functionalized Acid–Base Nanocatalyst via HEPES Buffer Functionalized on Fe₃O₄ as a Reusable Catalyst for Annulation Reactions

Langmuir, Год журнала: 2024, Номер 40(26), С. 13397 - 13411

Опубликована: Июнь 20, 2024

Herein, we present a highly efficient dual-functionalized acid–base nanocatalyst, denoted as Fe3O4@GLYMO-HEPES, featuring sulfuric acid and tertiary amines its dual functional components. This catalyst is synthesized through the immobilization of 4-(2-hydroxyethyl)-1-piperazineethanesulfonic (HEPES) source these functionalities onto magnetite (Fe3O4) using 3-glycidoxypropyltriethoxysilane (GLYMO) linker. Characterization studies confirm integrity Fe3O4 core, with GLYMO-HEPES coating exhibiting no phase changes. Furthermore, Fe3O4@GLYMO-HEPES nanoparticles demonstrate uniform size distribution without aggregation. Notably, exhibits remarkable stability up to 200 °C possesses saturation magnetization value 31.5 emu/g, facilitating easy recovery via magnetic separation. These findings underscore potential versatile recyclable nanocatalyst for various applications. Its catalytic ability was evaluated in synthesis pyrano[2,3-c]pyrazoles 2-amino-3-cyano-4H-chromenes tandem Knorr–Knoevenagel–Michael–Thorpe–Ziegler-type heterocyclization mechanism, different aldehydes. A wide range fused heterocycles having good excellent yields. The process cost-effective, safe, sustainable, scalable, can be reused five times. prepared found stable heterogeneous showed recyclability.

Язык: Английский

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Nanomagnetic tetraaza (N₄ donor) macrocyclic Schiff base complex of copper(ii): synthesis, characterizations, and its catalytic application in Click reactions

Nanoscale Advances, Год журнала: 2023, Номер 5(23), С. 6594 - 6605

Опубликована: Янв. 1, 2023

In this research, a novel nanomagnetic tetra-azamacrocyclic Schiff base complex of copper(ii) was produced via post-synthetic surface modification an Fe3O4 by silane-coupling agent that contains acetylacetone functionalities at the end its chain. Moreover, target Cu involves tetradentate ligand obtained from template reaction with o-phenylenediamine and Cu(NO3)2·3H2O. Furthermore, prepared nominated as [Fe3O4@TAM-Schiff-base-Cu(II)]. The Fourier-transform infrared (FT-IR) analysis indicates presence Schiff-base-Cu in catalyst. X-ray spectroscopy (EDS) TGA reveal approximately 6-7% catalyst comprises hydrocarbon moieties. scanning electron microscope (SEM) transmission microscopy (TEM) images demonstrate uniformly shaped particles, nearly spherical nature, sizes ranging 9 to 18 nm. [Fe3O4@TAM-Schiff-base-Cu(II)] applied for click synthesis diverse range 5-substituted-1H-tetrazoles PEG-400 green medium. Regarding electrical properties Cu(ii) complex, tetra-aza (N4 donor) macrocyclic N-rich reasonable - leading excellent capacity catalyze these organic transformations. Finally, high magnetization value (44.92 emu g-1) enables recycling least four times without compromising catalytic efficiency.

Язык: Английский

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Post-Synthetic Generation of Amino-Acid-Functionalized UiO-66-NH₂ Metal–Organic Framework Nanostructures as an Amphoteric Catalyst for Organic Reactions

ACS Applied Nano Materials, Год журнала: 2023, Номер 7(1), С. 1265 - 1277

Опубликована: Дек. 22, 2023

Herein, the l-serine-functionalized metal–organic framework nanostructure is obtained via a simple two-step post-synthetic modification strategy. Interesting properties of serine, such as existence both acidic and basic groups, provide amphoteric active sites on UiO-66-NH2 that are not accessible through direct synthesis. In this sense, an excess amount 1,6 hexamethylene diisocyanate primarily used linker to allow conversion nucleophilic groups in isocyanate suitable electrophile group. l-serine reacted with generate corresponding urea derivative. SEM, TEM, nitrogen adsorption analyses confirm average particle size approximately 24 nm pore 6.68 within framework. Notably, synthesized nanomaterial exhibited high catalytic activity, stability, durability solvent-free procedures synthesizing diverse range 4H-pyrano[2,3-b] pyridine-3,6-dicarbonitriles octahydropyrimido [4,5 b][1,8]naphthyridine-7-carbonitriles. Moreover, catalyst was easily separated─indicating substantial decrease activity upon five consecutive runs reaction.

Язык: Английский

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l–aspartic acid chelan–Cu (II) complex coted on ZrFe2O4 MNPs catalyzed one–pot annulation and cooperative geminal-vinylogous anomeric–based oxidation reactions

Journal of Physics and Chemistry of Solids, Год журнала: 2023, Номер 177, С. 111300 - 111300

Опубликована: Март 2, 2023

Язык: Английский

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A novel Cu complex coated on hercynite magnetic nanoparticles as an efficient and recoverable nanocatalyst for the selective synthesis of tetrazoles

Journal of Nanoparticle Research, Год журнала: 2024, Номер 26(1)

Опубликована: Янв. 1, 2024

Язык: Английский

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Phosphotungstic Acid-Supported Hercynite: A Magnetic Nanocomposite Catalyst for the Selective Esterification of Chloroacetic Acid

Langmuir, Год журнала: 2024, Номер 40(35), С. 18512 - 18524

Опубликована: Авг. 21, 2024

This study presents the synthesis and characterization of a novel phosphotungstic acid-functionalized hercynite@SiO

Язык: Английский

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One-Pot Multicomponent Synthesis of Pyrano[2,3-c]pyrazole and 2-Amino-4Hbenzo[ b]pyrans Catalyzed by Hercynite@SiO2@Tris as Novel and Efficient Nanocatalyst

Current Organic Chemistry, Год журнала: 2024, Номер 28(10), С. 777 - 788

Опубликована: Март 19, 2024

Abstract: In this study, magnetic hercynite nanoparticles (FeAl2O4, MNPs) were functionalized by cheap and readily available tris(hydroxymethyl)aminomethane (Tris) as an organocatalyst. Various techniques, including Vibrating Sample Magnetometry (VSM), Energy Dispersive X-ray Spectroscopy (EDS), Diffraction (XRD), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TG) employed to determine the morphology, particle size, physical properties, properties of nanoparticles. Additionally, Fourier transform infrared spectroscopy (FT-IR) techniques used investigate presence functional group. The activity new catalyst a magnetically recoverable nanocatalyst was investigated in synthesis oxygen nitrogencontaining heterocyclic compounds. Pyranoprazole 2-amino-4H-benzo[b]pyrans compounds synthesized with high efficiency short time. FeAl2O4@SiO2@Tris can be separated using attraction reused up 5 consecutive times without significant decrease yield target products or catalytic activity.

Язык: Английский

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Amine functionalized magnetic resorcinol formaldehyde as a green and reusable nanocatalyst for the Knoevenagel condensation

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 22, 2025

Язык: Английский

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