Highly efficient and green oxidation of alkanes and alkylaromatics with hydrogen peroxide catalysed by silver and vanadyl on mesoporous silica‐coated magnetite

Nouri, Seyed Hadi; Hosseini‐Monfared, Hassan

doi:10.1002/aoc.3649

Cited by 3 publications

(2 citation statements)

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“…One of the controversial challenges of oxidation reactions is the practical formation of intermediate and fine chemicals. 1 For various effective main reactions, such as epoxidation, alcohol oxidation, or heteroatom oxidation, molecular catalysts are available. However, a major drawback of such reactions is the separation of catalysts from the reaction mixture at the end of the process, which is very time-consuming and costly.…”

Section: Introductionmentioning

confidence: 99%

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Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O₂ as an environmentally safe oxidant

Pashaei

Aghaei

2023

Applied Organom Chemis

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Selective oxidation of olefins using catalysts with unique structural and compositional characteristics, high cost‐efficiency, and optimal catalytic performance is still one of the ongoing tasks. In the present study, we synthesized cobalt ferrite (CoFe2O4) magnetic nanoceramics by the sol–gel process as a feasible and effective technique for synthesizing high purity, homogeneous, and crystalline nanoceramics. The nanoceramics were characterized by different analyses such as FT‐IR, XRD, DLS, SEM, XPS, and VSM to investigate their size, morphology, crystallinity, and magnetic properties. Then, the obtained nanoceramics were applied as an environmentally clean catalyst for the oxidation of various olefins to the corresponding epoxides in the presence of molecular O2 and at ambient conditions. The results showed that the CoFe2O4 nanoceramic could act as an efficient catalyst for converting olefins to the corresponding products with excellent yields. To further study the catalytic activity, the effects of some parameters, including catalyst concentration, temperature, time, and solvent, on the oxidation reactions were also studied. In addition, the heterogeneous CoFe2O4 catalyst has advantages such as high selectivity, facile recovery, and reusability of catalyst without a significant decrease in catalytic activity. Finally, our results showed that the catalytic performance of these nanoceramics is among the best reported catalysts for olefin oxidation.

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Section: Introductionmentioning

confidence: 99%

“…One of the controversial challenges of oxidation reactions is the practical formation of intermediate and fine chemicals 1 . For various effective main reactions, such as epoxidation, alcohol oxidation, or heteroatom oxidation, molecular catalysts are available.…”

Section: Introductionmentioning

confidence: 99%

Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O₂ as an environmentally safe oxidant

Pashaei

Aghaei

2023

Applied Organom Chemis

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Platinum meso-tetraphenylporphyrin (Pt(II)TPP) mediated the efficient oxidation of alkyl aromatics to ketones in the presence of tert-butyl hydroperoxide

Lin,

Han,

et al. 2024

Applied Catalysis O: Open

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Selective and Efficient Catalytic Oxygenation of Alkyl Aromatics Employing H2O2 Catalyzed by Simple Porphyrin Iron(II) under Mild Conditions

Zhou

He²,

et al. 2023

Processes

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The excessive utilization of additives in chemical reactions is a troublesome problem in industrial processes, due to their adverse effects on equipment and processes. To acquire oxidative functionalization of alkyl aromatics under additive-free and mild conditions, a large library of metalloporphyrins was applied to the oxygenation of alkyl aromatics as catalysts with H2O2 as an oxidant. On the basis of systematic investigation of the catalytic performance of metalloporphyrins, it was discovered that, surprisingly, only porphyrin irons(II) possessed the ability to catalyze the oxygenation of alkyl aromatics with H2O2 under additive-free conditions and with satisfying substrate scope. Especially with 5,10,15,20-tetrakis(2,6-dichlorophenyl) porphyrin iron(II) (T(2,6-diCl)PPFe) as the catalyst, the substrate conversion reached up to 27%, with the selectivity of 85% to the aromatic ketone in the representative oxygenation of ethylbenzene with H2O2 as oxidant and without any additive used. The study of apparent kinetics and mechanisms in the optimal oxygenation system was also conducted in detail. Based on thorough exploration and characterization, the source of the superior catalytic performance of T(2,6-diCl)PPFe was acquired mainly as its planar structure, the low positive charge in the metal center, and better solubility in the oxygenation mixture, which favored the approach of reactants to the catalytic center, and the interaction between the metal center and H2O2. The beneficial interaction between T(2,6-diCl)PPFe and H2O2 was verified through cyclic voltammetry measurements and UV–vis absorption spectra. In comparison to previous studies, in this work, an efficient, selective, and additive-free means was developed for the oxygenation of alkyl aromatics under mild conditions, which could act as a representative example and a valuable reference for industrial processes in oxygenation of alkyl aromatics, and a great advance in the realization of oxygenation of alkyl aromatics under additive-free and mild conditions.

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Highly efficient and green oxidation of alkanes and alkylaromatics with hydrogen peroxide catalysed by silver and vanadyl on mesoporous silica‐coated magnetite

Cited by 3 publications

References 58 publications

Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O₂ as an environmentally safe oxidant

Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O₂ as an environmentally safe oxidant

Platinum meso-tetraphenylporphyrin (Pt(II)TPP) mediated the efficient oxidation of alkyl aromatics to ketones in the presence of tert-butyl hydroperoxide

Selective and Efficient Catalytic Oxygenation of Alkyl Aromatics Employing H2O2 Catalyzed by Simple Porphyrin Iron(II) under Mild Conditions

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Highly efficient and green oxidation of alkanes and alkylaromatics with hydrogen peroxide catalysed by silver and vanadyl on mesoporous silica‐coated magnetite

Cited by 3 publications

References 58 publications

Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O2 as an environmentally safe oxidant

Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O2 as an environmentally safe oxidant

Platinum meso-tetraphenylporphyrin (Pt(II)TPP) mediated the efficient oxidation of alkyl aromatics to ketones in the presence of tert-butyl hydroperoxide

Selective and Efficient Catalytic Oxygenation of Alkyl Aromatics Employing H2O2 Catalyzed by Simple Porphyrin Iron(II) under Mild Conditions

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Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O₂ as an environmentally safe oxidant

Cobalt ferrite magnetic nanoceramics as an efficient nanocatalyst for the oxidation of olefins in the presence of molecular O₂ as an environmentally safe oxidant