Synthesis of a new schiff base oxovanadium complex with melamine and 2‐hydroxynaphtaldehyde on modified magnetic nanoparticles as catalyst for allyl alcohols and olefins epoxidation

Farzaneh, Faezeh; Asgharpour, Zeinab

doi:10.1002/aoc.4896

Cited by 13 publications

(9 citation statements)

References 63 publications

(73 reference statements)

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“…The magnetic curcumin was subsequently functionalized with 3-chloropropyltrimethoxysilane (CPTMS) through an SN2 reaction by removing methoxy groups to prepare Fe 3 O 4 @Cur 49 . Then, the attachment of Mel under reflux conditions and ethanol solution occurred by a substitution reaction (Fe 3 O 4 @Cur/ Mel) 50 . The immobilization of the AgNPs in the final stage as the catalytic active sites in nitroarenes reduction was accomplished by stirring the AgNO 3 salt added to the reaction flask containing Fe 3 O 4 @Cur/Mel magnetic nanocatalyst 10 .…”

Section: Resultsmentioning

confidence: 99%

Silver-assisted reduction of nitroarenes by an Ag-embedded curcumin/melamine-functionalized magnetic nanocatalyst

Khaleghi

Forouzandeh-Malati

Ganjali

et al. 2023

Sci Rep

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In the current study, we introduce a hybrid magnetic nanocomposite comprised of curcumin (Cur), iron oxide magnetic nanoparticles (Fe3O4 MNPs), melamine linker (Mel), and silver nanoparticles (Ag NPs). Initially, a facile in situ route is administrated for preparing the Fe3O4@Cur/Mel-Ag effectual magnetic catalytic system. In addition, the advanced catalytic performance of the nanocomposite to reduce the nitrobenzene (NB) derivatives as hazardous chemical substances were assessed. Nevertheless, a high reaction yield of 98% has been achieved in short reaction times 10 min. Moreover, the Fe3O4@Cur/Mel-Ag magnetic nanocomposite was conveniently collected by an external magnet and recycled 5 times without a noticeable diminish in catalytic performance. Therefore, the prepared magnetic nanocomposite is a privileged substance for NB derivatives reduction since it achieved notable catalytic activity.

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Section: Resultsmentioning

confidence: 99%

Silver-assisted reduction of nitroarenes by an Ag-embedded curcumin/melamine-functionalized magnetic nanocatalyst

Khaleghi

Forouzandeh-Malati

Ganjali

et al. 2023

Sci Rep

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“…These results agreed with literature reports using a vanadium catalyst coordinated to a Schiff base immobilized in iron oxide (Fe 3 O 4 ) magnetic nanoparticles, in oxidation catalysis of allylic alcohols, including trans-hex-2-en-1-ol, in the presence of tbhp as oxidant agent. According to that report, the catalyst was very efficient in substrate conversion, reaching 100%, only after a few hours of reaction [36].…”

Section: Reusability Of the Mnp30-si-phos-mo Mnp11-si-phos-mo And Mmentioning

confidence: 94%

Selective and Efficient Olefin Epoxidation by Robust Magnetic Mo Nanocatalysts

2021

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Iron oxide magnetic nanoparticles were synthesized with different sizes (11 and 30 nm). Subsequently they were shelled with a silica layer allowing grafting of an organic phosphine ligand that coordinated to the [MoI2(CO)3] organometallic core. The silica layer was prepared by the Stöber method using either mechanical (both 11 and 30 nm nanoparticles) or ultrasound (30 nm only) stirring. The latter nanoparticles once coated with silica were obtained with less aggregation, which was beneficial for the final material holding the organometallic moiety. The Mo loadings were found to be 0.20, 0.18, and 0.34 mmolMo·g−1 for MNP30-Si-phos-Mo,MNP11-Si-phos-Mo, and MNP30-Sius-phos-Mo, respectively, with the ligand-to-metal ratio reaching 4.6, 4.8, and 3.2, by the same order, confirming coordination of the Mo moieties to two phos ligands. Structural characterization obtained from powder X-ray diffraction (XRD), scanning electron microscopy (SEM)/ transmission electron microscopy (TEM) analysis, and Fourier-transform infrared (FTIR) spectroscopy data confirmed the successful synthesis of all nanomaterials. Olefin epoxidation of several substrates catalyzed by these organometallic nano-hybrid materials using tert-butyl hydroperoxide (tbhp) as oxidant, achieved very good results. Extensive testing of the catalysts showed that they are highly active, selective, recyclable, and efficient concerning oxidant consumption.

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“…The choice of such strategy is suggested by the ease of recovery of the catalyst and of the process for magnetic and silica-coated magnetic nanoparticles functionalization [221,222]. This peculiar strategy is used to deposit Schiff-bases and other chelating agents dedicated either to olefins epoxidation [223][224][225][226][227][228][229], sulfide oxidation [228,230,231], alcoholysis of epoxides [232], or homocoupling of terminal alkynes [233]. Although the large number of papers available, organometallic-functionalized magnetic nanoparticles are rarely employed for fine chemicals production through biomass valorization.…”

Section: Nanoparticlesmentioning

confidence: 99%

Support–Activity Relationship in Heterogeneous Catalysis for Biomass Valorization and Fine-Chemicals Production

et al. 2021

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Heterogeneous catalysts are progressively expanding their field of application, from high-throughput reactions for traditional industrial chemistry with production volumes reaching millions of tons per year, a sector in which they are key players, to more niche applications for the production of fine chemicals. These novel applications require a progressive utilization reduction of fossil feedstocks, in favor of renewable ones. Biomasses are the most accessible source of organic precursors, having as advantage their low cost and even distribution across the globe. Unfortunately, they are intrinsically inhomogeneous in nature and their efficient exploitation requires novel catalysts. In this process, an accurate design of the active phase performing the reaction is important; nevertheless, we are often neglecting the importance of the support in guaranteeing stable performances and improving catalytic activity. This review has the goal of gathering and highlighting the cases in which the supports (either derived or not from biomass wastes) share the worth of performing the catalysis with the active phase, for those reactions involving the synthesis of fine chemicals starting from biomasses as feedstocks.

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Synthesis of a new schiff base oxovanadium complex with melamine and 2‐hydroxynaphtaldehyde on modified magnetic nanoparticles as catalyst for allyl alcohols and olefins epoxidation

Cited by 13 publications

References 63 publications

Silver-assisted reduction of nitroarenes by an Ag-embedded curcumin/melamine-functionalized magnetic nanocatalyst

Silver-assisted reduction of nitroarenes by an Ag-embedded curcumin/melamine-functionalized magnetic nanocatalyst

Selective and Efficient Olefin Epoxidation by Robust Magnetic Mo Nanocatalysts

Support–Activity Relationship in Heterogeneous Catalysis for Biomass Valorization and Fine-Chemicals Production

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