Recyclable Magnetic Fe₃O₄ Nanoparticle-Supported Chloroaluminate Ionic Liquids for Heterogeneous Lewis Acid Catalysis

Abstract

In our efforts to overcome the limitations in using ionic liquids (ILs) as homogeneous catalysts, we prepared a heterogeneous analog by loading 10−40 wt% [HN 222 ][Al 2 Cl 7 ] ([HN 222 ] + = triethylammonium) onto Fe 3 O 4 nanoparticles (NPs) to obtain free-flowing solid catalysts. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX), and Brunauer−Emmett−Teller (BET) surface area analysis of 20% [HN 222 ][Al 2 Cl 7 ]/Fe 3 O 4 , all confirmed loading of the IL. Catalytic performance was assessed with the alkylation of benzene with benzyl chloride reaction, and 20% [HN 222 ][Al 2 Cl 7 ]/Fe 3 O 4 was found to be the best catalyst with 100% conversion and 77% product selectivity.The catalyst was also found to be active for alkylation of other substrates such as toluene and o-, m-, and p-xylene. Utilizing a magnet for separation, the catalyst could be recycled and reused for five runs without loss of catalytic activity.

Regioselective, Greener Protocol for the Synthesis of N‐Heterocyclic Compounds Catalyzed by Recyclable CuO NPs Coated with Ionic Liquid (CuO[HN222][Al2Cl7]

“…The band at 2913.12 cm −1 is due to symmetric stretching of the O−H functional group [27] and the sharp peak in the range of 3300–3500 cm −1 may indicate the N + ‐H stretching of IL (Figure 3 (I) A). The existence of ionic liquid in the catalytic system is confirmed by an IR band at 539.56 cm −1 that is compatible with the Al−Cl stretch of [Al 2 Cl 7 ] − and C−N stretching vibrations of triethylamine are observed as 1028.92‐1239.45 cm −1 (Figure 3 (I) A) [30] …”

“…The existence of ionic liquid in the catalytic system is confirmed by an IR band at 539.56 cm À 1 that is compatible with the AlÀ Cl stretch of [Al 2 Cl 7 ] À and CÀ N stretching vibrations of triethylamine are observed as 1028.92-1239.45 cm À 1 (Figure 3 (I) A). [30] Powder-X-ray Diffraction (P-XRD): The crystal domain size and structure of the synthesized NPs were assessed using powder P-XRD.…”

“…[33] Additionally, the survey scan XPS spectrum of recycled nanocatalyst displays all of the constituent peaks (Figure 4 5). [30]…”

An effective antimicrobial complex of nanoscale β-cyclodextrin and ciprofloxacin conjugated to a cell adhesive dipeptide

“…The conduction of drugs via the self-assembled nanostructured and released drug encapsulation at the object is related to passive targeting. [16][17][18] In the last few decades, the application of nanomaterials in a variety of scientic domains, including; catalysis, [19][20][21][22][23][24][25][26][27] photocatalysis, 28,29 gas adsorption, 30 applications in environments, 31 devices in photovoltaic and photoelectric, 32,33 and drug delivery has grown. There are different types of nanocarriers like; polymeric nanoparticles (NPs), magnetic nanoparticles (MNPs), gold nanoparticles (AuNPs), and mesoporous silica nanoparticles (MSNPs).…”

Cefixime-Containing Silica Nanoseeds Coated by a Hybrid PVA-Gold Network with a Cys–Arg Dipeptide Conjugation: Enhanced Antimicrobial and Drug Release Properties

“…The use of nanomaterials in different scopes of science such as catalysis, − photocatalysis, , gas adsorption, environmental applications, photovoltaic and photoelectric devices, , and drug delivery has increased in recent decades due to obtaining outstanding upshots. According to the literature in the field of drug delivery, encapsulation of the target drug into a carrier system and subsequent release inside the target cell are considered as one of the most effective resolutions for overcoming the bacterial resistance .…”