Acidic ionic liquid supported on silica-coated magnetite nanoparticles as a green catalyst for one-pot diazotization–halogenation of the aromatic amines

Isaad, Jalal

doi:10.1039/c4ra05705h

Cited by 26 publications

(7 citation statements)

References 60 publications

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“…The specific magnetization saturation of the synthesized Fe 3 O 4 is 0.21 emg at low temperature and 0.19 emg at room temperature. These are one-third of the specific magnetization saturations of pure Fe 3 O 4 43, demonstrating that the derived magnetism is relatively small. The magnetization property of Fe 3 O 4 generally depends on the grain size.…”

Section: Resultsmentioning

confidence: 83%

Facile One-pot Transformation of Iron Oxides from Fe2O3 Nanoparticles to Nanostructured Fe3O4@C Core-Shell Composites via Combustion Waves

Shin

Lee

Yeo

et al. 2016

Sci Rep

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The development of a low-cost, fast, and large-scale process for the synthesis and manipulation of nanostructured metal oxides is essential for incorporating materials with diverse practical applications. Herein, we present a facile one-pot synthesis method using combustion waves that simultaneously achieves fast reduction and direct formation of carbon coating layers on metal oxide nanostructures. Hybrid composites of Fe2O3 nanoparticles and nitrocellulose on the cm scale were fabricated by a wet impregnation process. We demonstrated that self-propagating combustion waves along interfacial boundaries between the surface of the metal oxide and the chemical fuels enabled the release of oxygen from Fe2O3. This accelerated reaction directly transformed Fe2O3 into Fe3O4 nanostructures. The distinctive color change from reddish-brown Fe2O3 to dark-gray Fe3O4 confirmed the transition of oxidation states and the change in the fundamental properties of the material. Furthermore, it simultaneously formed carbon layers of 5–20 nm thickness coating the surfaces of the resulting Fe3O4 nanoparticles, which may aid in maintaining the nanostructures and improving the conductivity of the composites. This newly developed use of combustion waves in hybridized nanostructures may permit the precise manipulation of the chemical compositions of other metal oxide nanostructures, as well as the formation of organic/inorganic hybrid nanostructures.

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Section: Resultsmentioning

confidence: 83%

Facile One-pot Transformation of Iron Oxides from Fe2O3 Nanoparticles to Nanostructured Fe3O4@C Core-Shell Composites via Combustion Waves

Shin

Lee

Yeo

et al. 2016

Sci Rep

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“…Mass spectra were recorded on a Thermo Scientific LCQ-Fleet mass spectrometer under electrospray ionization (ESI, + c or −c technique). High Resolution Mass Spectra (HRMS) were recorded on an LTP Orbitrap mass [37,38,42,43]. The catalyst Fe 3 O 4 @SILnP was synthetized following the protocol showed in Scheme 1 [37], and its chemical structure was fully characterized as reported in our previous works [37,38].…”

Section: Chemicals and Materialsmentioning

confidence: 99%

“…Recently, we developed an acidic ionic liquid based on N-propyl-2-pyrrolidonium hydrogen sulfate ([H-NMP]HSO 4 ) moiety, supported on silica-coated magnetite nanoparticles "Fe 3 O 4 @SILnP" (Fig. 1) as a green catalyst for one-step diazotization-halogenation reaction of amines derivatives [37] and the synthesis of azoic dyes under solvent-free conditions [38]. Fe 3 O 4 @SILnP catalyst [37,38] was selected because it provides a large surface area and…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Spectroscopic Characterization of Water Soluble Triazene Dyes Based on Glyco-conjugated Pyrazolone Derivatives Catalyzed by an Acidic Ionic Liquid Supported on Silica-Coated Magnetite Nanoparticles

Isaad¹,

Achari

2020

Chemistry Africa

Self Cite

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Novel water soluble triazene dyes based on glyco-conjugated pyrazolone amines were synthetized by using N-propyl-2-pyrrolidonium hydrogen sulfate supported on silica-coated magnetite nanoparticle as acid catalyst. This organic-inorganic hybrid composite showed an excellent catalytic activity toward diazotization reaction of pyrazolone amines performing triazene dyes under solvent-free conditions in high yields. The spectroscopic properties confirmed the tendency of these dyes to exist in their hydrazo-keto tautomer forms. The study of the solubility of these dyes in water showed that their water solubility requires a minimum percentage weight of 50% of the carbohydrate part.

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“…[eluent: petroleum ether/Et 2 O = 25:1 (500 mL) to petroleum ether/EtOAc = 2:1 (500 mL)], 4-iodobenzoic acid (2g) 24 (212.7 mg, 86%) and 4-iodobenzaldehyde (3g) 25 (27.8 mg, 91% purity, 11%). Yields of 86% of 2g and 14% of 3g were observed by NMR analysis of the crude product using CH 2 Br 2 as an internal standard.…”

Section: Psp Syn Thesismentioning

confidence: 99%

Studies on Iron-Catalyzed Aerobic Oxidation of Benzylic Alcohols to Carboxylic Acids

Jiang

2018

Synthesis

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A comprehensive study on aerobic oxidation of benzylic alcohols to carboxylic acids with a catalytic amount each of Fe(NO3)3·9H2O, TEMPO, and KCl is conducted. Various synthetically useful functional groups are well tolerated in the reaction. Distinct electronic and steric effects are observed in the reaction: electron-withdrawing groups accelerate the reaction while electron-donating groups make the reaction slower, and ortho-substituted substrates react slower than meta-substituted substrates. Several large-scale reactions (100 mmol) are conducted using a slow air flow of 30 mL/min to demonstrate the practicality of this method in an academic laboratory.

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Acidic ionic liquid supported on silica-coated magnetite nanoparticles as a green catalyst for one-pot diazotization–halogenation of the aromatic amines

Abstract: Acidic ionic liquid was immobilized on silica-coated magnetite nanoparticles (Fe3O4@SILnP) and used as an efficient heterogeneous catalyst for the diazotization–iodination reaction of different aromatic amines under solvent-free conditions at room temperature.

Cited by 26 publications

References 60 publications

Facile One-pot Transformation of Iron Oxides from Fe2O3 Nanoparticles to Nanostructured Fe3O4@C Core-Shell Composites via Combustion Waves

Facile One-pot Transformation of Iron Oxides from Fe2O3 Nanoparticles to Nanostructured Fe3O4@C Core-Shell Composites via Combustion Waves

Synthesis and Spectroscopic Characterization of Water Soluble Triazene Dyes Based on Glyco-conjugated Pyrazolone Derivatives Catalyzed by an Acidic Ionic Liquid Supported on Silica-Coated Magnetite Nanoparticles

Studies on Iron-Catalyzed Aerobic Oxidation of Benzylic Alcohols to Carboxylic Acids

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