Cu-containing magnetic yolk-shell structured ionic liquid-based organosilica nanocomposite: A powerful catalyst with improved activity

The development of various methodologies for the formation of carbon‐nitrogen bonds is one of the valuable tasks in the field of organic synthesis because the final products are extensively utilized in pharmaceuticals, biologically active compounds, and natural products. The utilization of nanosized metal catalysts with high surface energy, large surface‐to‐volume ratio, excellent thermal stability, and reactive morphology in C‐N cross‐coupling reactions has received considerable attention, in recent years. The excellent catalytic performance, the high yield of products, carrying out the reactions under relatively mild and ligand‐free conditions, and less toxicity to the environment, recoverability, and reusability of catalysts for several times without a remarkable degradation in activity are advantages of these nanocatalysts. This review intends to summarize the latest progress in the fabrication of nanocatalysts and their applications in the construction of carbon‐nitrogen bonds via cross‐coupling reactions. Abundant nanocatalysts based on metal and metal oxide nanoparticles/complexes including copper, palladium, nickel, cobalt, silver, gold, zirconium, and zinc have successfully been applied in these reactions. Various aspects of the reactions, different strategies of fabrication of nanocatalysts, and their recyclability have been surveyed. Literature has been investigated from 2015 to 2021.

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Section: Copper Nanocatalystsmentioning

confidence: 99%

Recent advances in the application of nanocatalysts in C‐N coupling reactions

Rangraz

Heravi

2022

Applied Organom Chemis

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“…Moreover, the abundant silanol groups on the silica surface provide suitable conditions for different types of modification 10 , 25 – 28 . Some of recently developed magnetic nanostructures with silica shells are Fe 3 O 4 @BOS@SB/In 29 , Fe 3 O 4 @SiO 2 @PMO 30 , Re–SiO 2 –Fe 3 O 4 31 , Mag@Ti-NOS 32 , Fe 3 O 4 @RF@void@PMO(IL)/Cu 33 , Fe 3 O 4 @SiO 2 @propyl‐ANDSA 34 and Fe 3 O 4 @Au@mSiO 2 -dsDNA/DOX 35 . The MNPs with silica shell can be used as electrode 36 , adsorbent 37 , sensor 38 , catalyst support 10 , 29 , 32 – 34 , 39 , 40 , ion exchanger 41 and so on.…”

Section: Introductionmentioning

confidence: 99%

Ag2CO3 containing magnetic nanocomposite as a powerful and recoverable catalyst for Knoevenagel condensation

Karimkhah

Elhamifar

Shaker

2021

Sci Rep

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In this paper, the synthesis, characterization and catalytic application of a novel magnetic silica-supported Ag2CO3 (MS/Ag2CO3) with core–shell structure are developed. The MS/Ag2CO3 nanocomposite was prepared through chemical modification of magnetic MS nanoparticles with AgNO3 under alkaline conditions. The structure, chemical composition and magnetic properties of MS/Ag2CO3 were investigated by using VSM, PXRD, FT-IR, EDX and SEM techniques. The MS/Ag2CO3 nanocomposite was used as an effective catalyst for the Knoevenagel condensation under solvent-free conditions at 60 °C in an ultrasonic bath. The recovery and leaching tests were performed to study the nature of the MS/Ag2CO3 catalyst under applied conditions.

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“…[41][42][43] Also, silica has received much attention due to its poor chemical permeability, nontoxicity, high chemical and thermal stability, and high availability of silanol groups on its surface for any modification. [26,44] Recently, different magnetic nanoparticles (MNPs) have been used as support for homogeneous catalysts. The most fascinating feature of MNP-supported catalysts is the easy recycling controlled by simple magnetically separation.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, in recent years, nanocomposites have attracted a lot of attention due to their wide applications in various fields such as photocatalysts [ 24,25 ] and catalysts, [ 26–33 ] lithium batteries, [ 34 ] biomedical, [ 35 ] solar cells, [ 36 ] and sensors. [ 37 ] Magnetic core‐shell structured nanomaterials, as a special class of nanocomposites, are particularly important between researchers.…”

Section: Introductionmentioning

confidence: 99%

“…Facing with the requirement of sustainable expansion, many efforts have been made to design and preparation of polyoxometalate-based hybrid materials, not only due to their appealing architectures [18,19] but also owing to their potential applications in the catalysis, surface and interface science, magnetic chemistry, materials science, and analytical chemistry. [15,16,[20][21][22][23] On the other hand, in recent years, nanocomposites have attracted a lot of attention due to their wide applications in various fields such as photocatalysts [24,25] and catalysts, [26][27][28][29][30][31][32][33] lithium batteries, [34] biomedical, [35] solar cells, [36] and sensors. [37] Magnetic core-shell structured nanomaterials, as a special class of nanocomposites, are particularly important between researchers.…”

Section: Introductionmentioning

confidence: 99%

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Core‐shell structured magnetite silica‐supported hexatungstate: A novel and powerful nanocatalyst for the synthesis of biologically active pyrazole derivatives

Nemati

Elhamifar

Zarnegaryan

et al. 2021

Applied Organom Chemis

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This article describes the synthesis of a novel core-shell structured magnetic silica-supported hexatungstate (Fe 3 O 4 @SiO 2 -NH 3 [W 6 O 19 ]) nanocatalyst through immobilization of hexatungstate on amine-modified magnetic silica nanoparticles. The physicochemical properties of Fe 3 O 4 @SiO 2 -NH 3 [W 6 O 19 ] were investigated by using Fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction, vibrating sample magnetometer, wide-angle PXRD, scanning electron microscopy, transmission electron microscopy, and energydispersive X-ray spectroscopy analyses. The Fe 3 O 4 @SiO 2 -NH 3 [W 6 O 19 ] nanocatalyst was used as a powerful and heterogeneous catalyst in the synthesis of pyrazole derivatives. This novel catalyst was reused at least seven times without loss of its activity.

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Cu-containing magnetic yolk-shell structured ionic liquid-based organosilica nanocomposite: A powerful catalyst with improved activity

Cited by 16 publications

References 43 publications

Recent advances in the application of nanocatalysts in C‐N coupling reactions

Recent advances in the application of nanocatalysts in C‐N coupling reactions

Ag2CO3 containing magnetic nanocomposite as a powerful and recoverable catalyst for Knoevenagel condensation

Core‐shell structured magnetite silica‐supported hexatungstate: A novel and powerful nanocatalyst for the synthesis of biologically active pyrazole derivatives

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