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Fe–Cu–chloride ionic liquid immobilized SBA-15 for solvent-free oxidation of styrene to benzaldehyde with H2O2.
- Source :
-
New Journal of Chemistry . 7/14/2024, Vol. 48 Issue 26, p11776-11782. 7p. - Publication Year :
- 2024
-
Abstract
- Copper, iron–chloride ionic liquids (ILs) were immobilized on SBA-15 via N-methylimidazole grafting with C–Cl in chloropropylsilane pre-anchored on SBA-15, followed by FeCl3 and CuCl2 coordination to imidazolium chloride to generate a double metal IL-supported mesoporous composite (SIL-CuFe). The prepared composite exhibited an effective catalytic performance for the solvent-free oxidation of styrene to benzaldehdye (BzH) with H2O2 oxidant, offering 51% conversion, a turnover number (TON) of 330.5 mol molFe+Cu−1, and a selectivity of 71% at a reaction temperature of 70 °C. The composite catalyst can be easily recovered and effectively reused without a significant loss in activity and selectivity. The quenching experiments by adding tert-butanol (TBA), 1,4-benzoquinone (p-BQ) and L -histidine (L -HIS) in the reaction system were conducted to identify the type of reactive O species, specifically ˙OH, ˙O2−, and 1O2, produced by catalyst activation with H2O2 and played a main role in the oxidation. The reaction mechanism of the oxidation process is also proposed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 26
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 178184262
- Full Text :
- https://doi.org/10.1039/d4nj00003j