A Magnetically Recyclable Nanocomposite Catalyst for Olefin Epoxidation

Shokouhimehr, Mohammadreza; Piao, Yuanzhe; Kim, Jaeyun; Jang, Youngjin; Hyeon, Taeghwan

doi:10.1002/anie.200702386

Cited by 309 publications

(155 citation statements)

References 111 publications

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“…Finally, comparing the catalytic reaction time and conversion of reported works (1 day, [39,42,44] 12 h, [17] 18 h, [40] 8 h, [41,46,50] 7 h, [48] 5 h, [45] 4 h [43] ) and [39] [MoO(O 2 ) 2 (4-MepyO) 2 ].H 2 O UHP/C 4 mim(PF 6 )/18 h 90 [40] MoO 2 (VI)T TBHP/CH 3 Cl/8 h 86 [41] [MoO 2 (Salen) (piperazine)] n TBHP/C 2 H 4 Cl 2 /12 h 95 [17] SM-48ccg TBHP/toluene/24 h 34 [42] Dioxo-Mo(VI) acac-AmpMCM-41 TBHP/CH 3 Cl/4 h 97 [43] [MoO 2 Cl 2 (oep-H 2 saldpen)] TBHP/DCE/24 h 100 [44] Mag-Mo-Nano catalyst TBHP/CCl 4 /5 h 99 [45] Schiff base Mo(VI) catalysts TBHP/DCE/8 h 100 [46] Polymer-supported Mo TBHP/CCl 4 /3 h 91 [47] MoO 2 Sal/APTSC MNPs TBHP/CH 3 Cl/7 h 99 [48] Mo-APTS-AC TBHP/CH 3 Cl/3 h 89 [49] MoO 2 acacen@APTS NPs TBHP/CH 3 Cl/8 h 95 [50] Fe …”

Section: Epoxidation Of Olefins Catalysed Bymentioning

confidence: 99%

Excellent alkene epoxidation catalytic activity of macrocyclic‐based complex of dioxo‐Mo(VI) on supermagnetic separable nanocatalyst

Payami

Bezaatpour

Eskandari

2017

Applied Organom Chemis

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A phenoxybutane-based Schiff base complex of cis-dioxo-Mo(VI) was supported on paramagnetic nanoparticles and characterized using powder Xray diffraction, infrared, diffuse reflectance and atomic absorption spectroscopies, scanning and transmission electron microscopies and vibrating sample magnetometry. The separable nanocatalyst was tested for the selective epoxidation of cyclohexene, cyclooctene, styrene, indene, α-pinene, 1-octene, 1-heptene, 1-dodecene and trans-stilbene using tert-butyl hydroperoxide (80% in di-tert-butyl peroxide-water, 3:2) as oxidant in chloroform. The catalyst was efficient for oxidation of cyclooctene with 100% selectivity for epoxidation with 98% conversion in 10 min. We were able to separate magnetically the nanocatalyst using an external magnetic field and used the catalyst at least six successive times without significant decrease in conversion.The turnover frequency of the catalyst was remarkable (2556 h −1 for cyclooctene). The proposed nanomagnetic catalyst has advantages in terms of catalytic activity, selectivity, catalytic reaction time and reusability by easy separation.

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Section: Epoxidation Of Olefins Catalysed Bymentioning

confidence: 99%

Excellent alkene epoxidation catalytic activity of macrocyclic‐based complex of dioxo‐Mo(VI) on supermagnetic separable nanocatalyst

Payami

Bezaatpour

Eskandari

2017

Applied Organom Chemis

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“…Their exceptional instabilities in extremely acidic, drastic or corrosive reaction conditions, however, can also be resolved by engineering the design and fabrication strategies of the hybrid nanostructured catalysts [36]. To circumvent this drawback, an impermeable dense silica layer has been coated on the core magnetic NPs to protect them from destructive erosion during the harsh reaction conditions [37]. To pursue innovative applications and developments, hybrid magnetic nanocomposites have been designed and applied for many kinds of organic transformations, including reductions.…”

Section: Sustainable Magnetic Nanostructured Catalystsmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

Self Cite

183

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This review is focused on the strategies and designs of magnetic nanostructured catalysts showing the enhanced and sustainable catalytic performances for the heterogeneous reduction of nitoaromatics. Magnetic catalysts have the benefits of easy recovery and reuse after the completion of the reactions and green chemical processes. Magnetic separation, among the various procedures for removing catalysts, not only obviates the requirement of catalyst filtration or centrifugation after the completion of reactions, but also provides a practical technique for recycling the magnetized nanostructured catalysts. Consequently, discussions will address the methodologies and exemplars for the reusable magnetic composite catalysts. Because the synthesis of ideal magnetic nanostructured catalysts is of primary importance in the development of high-quality sustainable processes, the designs, preparation methods and recyclability of various recoverable magnetic nanostructured catalysts are emphasized. The representative methods and strategies for the synthesis of durable and reusable magnetic nanostructured catalysts are highlighted. The advantages, disadvantages, recyclability and the efficiency of the introduced heterogeneous systems have been explored in the reduction of nitrobenzene derivatives.

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“…44 According to these references, the magnetite nanoparticles (0.5 g) were dispersed in ethanol (50 mL). NH 4 OH (3 mL) and TEOS (1 mL) were added successively.…”

Section: Synthesis Of Magnetite Nanoparticlesmentioning

confidence: 99%

Selective oxidation of sulfides and hydrocarbons with H$_{2}$O$_{2}$ over manganese catalyst supported on nanoparticles

Ghorbanloo¹,

Tarasi²,

Tao³

et al. 2014

Turk J Chem

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A Magnetically Recyclable Nanocomposite Catalyst for Olefin Epoxidation

Cited by 309 publications

References 111 publications

Excellent alkene epoxidation catalytic activity of macrocyclic‐based complex of dioxo‐Mo(VI) on supermagnetic separable nanocatalyst

Excellent alkene epoxidation catalytic activity of macrocyclic‐based complex of dioxo‐Mo(VI) on supermagnetic separable nanocatalyst

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Selective oxidation of sulfides and hydrocarbons with H$_{2}$O$_{2}$ over manganese catalyst supported on nanoparticles

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