Iron Oxide-Supported Copper Oxide Nanoparticles (Nanocat-Fe-CuO): Magnetically Recyclable Catalysts for the Synthesis of Pyrazole Derivatives, 4-Methoxyaniline, and Ullmann-type Condensation Reactions

Abstract

An efficient and benign protocol is reported for the synthesis of medicinally important pyrazole derivatives, 4-methoxyaniline, and Ullmann-type condensation reaction using magnetically separable and reusable magnetite-supported copper (nanocat-Fe-CuO) nanoparticles under mild conditions. Nanoparticles with average size of 20−30 nm have been synthesized using simple impregnation techniques in aqueous medium from readily available inexpensive starting materials and were recycled six times without loss in catalytic activity.

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

“…MNPs are effectively employed as heterogeneous catalyst for hydrogenation of ketone moiety to alcohol moiety by NaBH4 under the microwave radiation process [168]. An efficient and benign protocol has been reported for the synthesis of medicinally important pyrazole derivatives, 4-methoxyaniline, and Ullmann-type condensation reaction using MNPs (20-30 nm)-supported CuO NPs and the catalysts are recycled six times without loss in catalytic activity [169].…”

Green Synthesis of Magnetite (Fe3O4) Nanoparticles Using Seaweed (Kappaphycus alvarezii) Extract

“…Synthesis of Fe 3 O 4 -NPs has been carried out because of its unique properties, such as being superparamagnetic [3], biocompatible, biodegradable, and expected to be non-toxic to humans [4–6]. These unique properties allow Fe 3 O 4 -NPs to be widely used in different areas of applications, such as catalysis [7, 8], magnetic storage media [9], biosensors [10], magnetic resonance imaging (MRI) [11, 12], and targeted drug delivery [13–15]. …”

Sustainable Nanotechnology

“…Reusable, magnetically separable, magnetite-supported copper (nanocat-Fe -CuO) 20 -30 nm nanoparticles were prepared as catalysts for the synthesis of pyrazole derivatives, of 4-methoxyaniline and for Ullman-type condensation reactions, under mild conditions. The particles were recovered and reused six times without any loss in catalytic activity 16 . Intercellularly synthesised gold nanoparticles were characterised using surface-enhanced Raman spectroscopy (SERS).…”

“…Intercellularly synthesised gold nanoparticles were characterised using surface-enhanced Raman spectroscopy (SERS). Both intracellular and extracellular gold nanoparticles, biosynthesised by the green algae Pseudokirchneriella subcapitata were imaged using SERS to identify surface-associated biomolecules and aid in the determination of the mechanism for the nanoparticle biosynthesis 17 . Despite the widespread use of ZnO Current Commentary nanoparticles (NP) in various applications, they are actually among the more toxic NPs known.…”