Synthesis and characterization of Fe₃O₄@SiO₂@K₁₀ NPs applicable for N-ter-butyloxycarbonylation using solvent-free conditions

Abstract

The present article gives the synthesis, characterization, and applications of K10 supported silica-coated ferrite nanoparticles. The analysis was done using XRD, FT-IR, EDX FE-SEM techniques. Then N-Boc protected amine derivatives were catalyzed by using K10 supported silica-coated ferrite nanoparticles. In the presence of di-ter-butyl carbonate aromatic amines, K10-supported silica-coated nanoparticles were shown to be a reusable nanocatalyst for N-ter-butyloxycarbonylation of amine derivatives, and 2 mol percent nanoparticles were sufficient for the reaction conversion. The prepared nanocatalyst has several benefits, besides a solvent-free reaction, high yield, eco-friendly catalyst, lower cost, and the ability to be recovered from the reaction and reused without reducing catalytic properties.

Novel Cobalt‐Supported Silica‐Coated Ferrite Nanoparticles Applicable for Acylation of Amine, Phenol, and Thiols Derivatives under Solvent‐Free Condition

“…However, in some of the powder XRD samples assessed, there was no signal associated with ferric oxide. Using silicon dioxide (SiO 2 ) put over iron oxide Figure 2B, no additional signals were noticed due to the substance‘s crystalline shape [40,52] . For silica‐coated magnetite powder XRD, though, an increase there in the bandwidth of 400 bands (2 θ =20‐30 ° ) indicates improved good crystallinity and a change in the crystals lattice.…”

Magnetite-supported montmorillonite (K10) (nanocat-Fe-Si-K10): an efficient green catalyst for multicomponent synthesis of amidoalkyl naphthol

“…By using the Scherrer equation and the full-width at half maximum of a larger signal of XRD pattern, the particles size was determined to be 19 nm (26.5). 51 Because of the low content of K 10 , the peak is not evident in PXRD spectra. The peak for Al, Mg, and K was not observed in the powder XRD pattern, probably due to the low amount of elements being (about 0.57, 0.35, and 0.11 total amount of montmorillonite-1.03% by ICP-OES analysis).…”

“…3.1 Synthesis Fe 3 O 4 @SiO 2 @K 10 nanoparticles 45,51 While sonicating 1.2 g of Silica-coated ferrite nanoparticles in 100 mL of ethanol for around 30 minutes, then 0.53 g of montmorillonite (K 10 ) was added and mixed-phase during constant agitation. The pH of the working medium was then adjusted to 12 using a 1 M NaOH solution, and also the reaction mass was agitated for another 20 h at room temperature.…”

“…All the characterized data are similar to the previously reported work. 51 Fig. 1 the synthesized nanocatalyst was studied using a powder XRD pattern between 20°and 80°.…”

“…Another peak appears at 451.50 cm −1 , indicating the wavelength of Si-O-Si bending vibrations. 51 The study under Scanning Electron Microscope (SEM) pictures of ferrite, silica ferrite, and K 10 functionalized silica ferrite nanoparticles are shown in (Fig. 3A-C).…”