Catalytic nanoparticles and magnetic nanocatalysts in organic reactions: A mini review

Mollazehi, Fouziyeh

doi:10.3233/mgc-210170

Cited by 4 publications

(1 citation statement)

References 68 publications

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“…In recent decades, nanoparticles have been reported in several versatile applications, due to their high surface area. They are employed in many fields, such as biology, optics, magnetic applications, and catalysis [1][2][3][4]. Nanomagnetic catalysts are easily separated from the reaction medium and can be recycled several times, maintaining the catalytic efficiency [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Sulfonated Silica Coated CoFe2O4 Magnetic Nanoparticles for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-One and Octahydroquinazoline Derivatives

2023

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Sulfonated-silica-coated cobalt ferrite (CoFe2O4) magnetic nanoparticles (MNPs-SiCoFe-SO3H) are efficient heterogeneous catalysts for the synthesis of 3,4-dihydropyrimidin-2(1H)-one and octahydroquinazoline derivatives in the absence of solvent. The effects of solvent, temperature, and catalyst amount on the reaction are investigated. The easy separation, reusability of the catalyst, simplicity of the procedure, mild reaction conditions, and good yields (68–95%) within short reaction times (15–70 min) are the advantages of this method. The catalyst can be reused up to eight times with not much loss of activity. Scanning electron microscopy images, X-ray diffraction spectra, and elemental analysis of the recycled catalyst show that the catalyst is stable after the reaction.

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Section: Introductionmentioning

confidence: 99%

Sulfonated Silica Coated CoFe2O4 Magnetic Nanoparticles for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-One and Octahydroquinazoline Derivatives

2023

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Selective Hydrogenation Reaction: Utilizing a Microreactor for Continuous Flow Synthesis of Nickel Nanoparticles

Srivastava

2024

LOC

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Introduction:: In this investigation, we employed a continuous flow reactor to synthesize nickel (Ni) nanoparticles exhibiting uniform size distribution and excellent stability. Our focus centered on exploring the impact of reactant dilution and flow rate on the synthesis process. Result:: It was observed that the optimization of these parameters played a pivotal role in obtaining small-sized Ni nanoparticles. Specifically, we achieved successful synthesis using a solution of 0.00025 M NiCl2·6H2O and 0.002 M NaBH4, with a flow rate of 25 mL/h. The resulting Ni nanoparticles were effectively coated with the CTAB surfactant, as confirmed through thorough analysis using TEM and PSD techniques. Additionally, the interaction between the surfactant and nanoparticles was verified via FTIR analysis. We subjected them to high-pressure alkene hydrogenation to assess the catalytic activity of the synthesized Ni nanoparticles. Method:: Encouragingly, the Ni nanoparticles exhibited excellent performance, producing hydrogenated products with high yields. Moreover, we capitalized on Ni nanoparticles' catalytic effect for synthesizing two natural compounds, brittonin A and dehydrobrittonin A. Remarkably, both compounds were successfully isolated in quantifiable yields. This synthesis protocol boasted several advantages, including low catalyst loading, omission of additives, broad substrate scope, straightforward product separation, and the ability to recover the catalyst up to eight times. In summary, this study effectively showcased the potential of continuous flow reactor technology in synthesizing stable and uniformly distributed nanoparticles. Conclusion:: Additionally, it highlighted the effectiveness of Ni nanoparticles as catalysts in various chemical reactions. The findings from this study hold significant implications for developing more efficient and sustainable chemical synthesis protocols.

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Continuous-flow Synthesis of Ruthenium Nanoparticles using a Microreactor for the Selective Hydrogenation Reaction

Srivastava

2023

LOC

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Introduction: In this study, a continuous flow reactor was used to synthesize Ru nanoparticles with a well-distributed size and good stability. The effects of reactant dilution and flow rate on the synthesis were investigated, and it was found that optimization of these parameters was critical in obtaining small-sized Ru nanoparticles using a solution of 0.00025 M RuCl3.3H2O and 0.001M NaBH4 at a flow rate of 30mL/h. The Ru nanoparticles obtained were coated with CTAB surfactant, which was confirmed by TEM and PSD studies Method: The interaction between the surfactant and the nanoparticles was also confirmed by FTIR analysis. The synthesized Ru nanoparticles were then tested for their catalytic activity in high-pressure alkene hydrogenation and were found to be effective in producing the corresponding hydrogenated products in good yields. Furthermore, the catalytic effect of Ru nanoparticles was utilized for the synthesis of two natural products, brittonin A and dehydrobrittonin A. Both products were successfully isolated in measurable yields. Result: This synthesis protocol had several advantages, including low catalyst loading, no use of additives, wide substrate scope, simple product separation, and catalyst recovery up to 8 times. Conclusion: Overall, this study demonstrated the potential of continuous flow reactor technology for synthesizing stable and well-distributed nanoparticles, and the effectiveness of Ru nanoparticles as catalysts in various chemical reactions. The study's findings have important implications for the development of more efficient and sustainable chemical synthesis protocols.

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Catalytic nanoparticles and magnetic nanocatalysts in organic reactions: A mini review

Cited by 4 publications

References 68 publications

Sulfonated Silica Coated CoFe2O4 Magnetic Nanoparticles for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-One and Octahydroquinazoline Derivatives

Sulfonated Silica Coated CoFe2O4 Magnetic Nanoparticles for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-One and Octahydroquinazoline Derivatives

Selective Hydrogenation Reaction: Utilizing a Microreactor for Continuous Flow Synthesis of Nickel Nanoparticles

Continuous-flow Synthesis of Ruthenium Nanoparticles using a Microreactor for the Selective Hydrogenation Reaction

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