Mechanochemically modified aluminosilicates for efficient oxidation of vanillyl alcohol

Saberi, Farveh; Doustkhah, Esmail; Ostovar, Somayeh; Franco, Ana; Shaterian, Hamid Reza; Luque, Rafael

doi:10.1016/j.catcom.2018.09.017

Cited by 24 publications

(13 citation statements)

References 32 publications

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“…Focusing on selectivity, higher selectivity toward the desired vanillin product was detected for the series FeMagN which confirms the advantages of the use of nitrate instead of the other inorganic salt ( Figure 5A). Note that selectivity to vanillin is higher than 70% for the catalyst 30$ MagN at 300 • C and higher than 50% for all samples prepared from nitrate, being higher than previously reported for Fe-containing samples and similar SBA-15-based samples (see Table S2, Supplementary Materials) [19,20]. Diphenylether was the other dominant product of this reaction from which a carbon balance above 95% was obtained for all runs.…”

Section: Resultsmentioning

confidence: 50%

Mechanochemically Synthesized Supported Magnetic Fe-Nanoparticles as Catalysts for Efficient Vanillin Production

et al. 2019

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Magnetically separable nanocatalysts were synthesized by incorporating ironnanoparticles on a mesoporous aluminosilicate (Al-SBA-15) through a mechanochemical grindingpathway in a single step. Noticeably, magnetic features were achieved by employing biomass wasteas a carbon source, which additionally may confer high oxygen functionalities to the resultingmaterial. The resulting catalysts were characterized using X-ray diffraction, X-ray photoelectronspectroscopy, transmission electron microscopy, scanning electron microscopy, porosimetry, andmagnetic susceptibility. The magnetic nanocatalysts were tested in the selective oxidative cleavagereaction of isoeugenol and vanillyl alcohol to vanillin. As a result, the magnetic nanocatalystsdemonstrated high catalytic activity, chemical stability, and enormous separation/reusabilityqualities. The origin of catalytic properties and its relationship with the iron oxide precursor wereanalyzed in terms of the chemical, morphological, and structural properties of the samples. Suchanalysis allows, thus, to highlight the superficial concentration of the iron entities and the interactionwith Al as key factors to obtain a good catalytic response.

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Section: Resultsmentioning

confidence: 50%

Mechanochemically Synthesized Supported Magnetic Fe-Nanoparticles as Catalysts for Efficient Vanillin Production

et al. 2019

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“…The emerging field of mechanochemistry has garnered a lot of attention over the last few years [1][2][3][4][5][6][7][8]. This unique solvent-free approach has been applied to various areas of science with exciting results, specifically in the area of oxidation reactions [9][10][11][12][13][14][15][16][17][18][19]. Since mechanochemical reactions are solvent free by nature, these novel conditions would be complementary to reactions that are troublesome in solution.…”

Section: Introductionmentioning

confidence: 99%

A Recyclable, Metal-Free Mechanochemical Approach for the Oxidation of Alcohols to Carboxylic Acids

Denlinger¹,

Carr²,

Waddell³

et al. 2020

Molecules

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The oxidation of primary alcohols under mechanochemical conditions in a Spex8000M Mixer/Mill was investigated. To facilitate ease of separation and recyclability, a polystyrene-bound version of a TEMPO catalyst was employed. When paired with Oxone® in a stainless-steel vial with a stainless-steel ball, several primary alcohols were successfully oxidized to the corresponding carboxylic acids. The product was isolated using gravity filtration, which also allowed for the polystyrene-bound TEMPO catalyst to be recovered and reused in subsequent oxidation reactions. Furthermore, it was demonstrated that the size and steric hindrance of the primary alcohol does not hinder the rate of the reaction. Finally, the aldehyde was selectively obtained from a primary alcohol under ball milling conditions by using a combination of non-supported TEMPO with a copper vial and copper ball.

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“…Aluminum-containing mesoporous silicas (Al-SBA-15) have received great attention due to their ordered structure and uniformed mesopore size, reasonably high surface area and good thermal stability [18,19,20]. There are many protocols for catalyst synthesis [19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

et al. 2019

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We have successfully incorporated iron species into mesoporous aluminosilicates (AlSBA15) using a simple mechanochemical milling method. The catalysts were characterized by nitrogen physisorption, inductively coupled plasma mass spectrometry (ICP-MS), pyridine (PY) and 2,6-dimethylpyridine (DMPY) pulse chromatography titration, powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX). The catalysts were tested in the N-alkylation reaction of aniline with benzyl alcohol for imine production. According to the results, the iron sources, acidity of catalyst and reaction conditions were important factors influencing the reaction. The catalyst showed excellent catalytic performance, achieving 97% of aniline conversion and 96% of imine selectivity under optimized conditions.

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Mechanochemically modified aluminosilicates for efficient oxidation of vanillyl alcohol

Cited by 24 publications

References 32 publications

Mechanochemically Synthesized Supported Magnetic Fe-Nanoparticles as Catalysts for Efficient Vanillin Production

Mechanochemically Synthesized Supported Magnetic Fe-Nanoparticles as Catalysts for Efficient Vanillin Production

A Recyclable, Metal-Free Mechanochemical Approach for the Oxidation of Alcohols to Carboxylic Acids

Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

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