Heterogeneous SBA-15-supported Oxoperoxomolybdenum(VI) complex for enhanced olefin epoxidation

Zare, Maryam; Moradi‐Shoeili, Zeinab; Ashouri, Fatemeh; Bagherzadeh, Mojtaba

doi:10.1016/j.catcom.2016.09.025

Cited by 14 publications

(15 citation statements)

References 19 publications

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“…94 It was found that the solvent and reaction temperature could affect the process. The best results were obtained at 95 C and decane as the solvent.…”

Section: Functionalized Sba For Developing Hybrid Catalysts Through Imentioning

confidence: 99%

Current advances in the utility of functionalized SBA mesoporous silica for developing encapsulated nanocatalysts: state of the art

Sadjadi

Heravi

2017

RSC Adv.

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The cavities of SBA mesoporous silica materials can be used as nanoreactors for embedding catalytic species such as nanoparticles, complexes and heteropolyacids etc. The encapsulated catalysts are renowned as superior catalytic systems regarding their catalytic activity, selectivity and reusability as well as suppressed leaching. An efficient method to improve the encapsulation of these catalysts, is in creating anchors for capturing catalytic species. It has been performed by functionalization of the surface of SBA mesoporous silica materials with various groups including sulfur, phosphorus and aminebased functional groups. The aim of this article is to review the recent advances (2014)(2015)(2016)(2017) in the field of the utility of functionalized SBA for developing encapsulated catalysts. In most cases the reusability of the catalyst and the leaching of the catalytic active species were discussed to disclose the role of functionalized SBA in heterogenizing and suppressing the leaching. Moreover, to show the superiority of these developed encapsulated catalysts, with a couple of examples we compared their catalytic activities with those of the conventional ones.

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“…94 It was found that the solvent and reaction temperature could affect the process. The best results were obtained at 95 C and decane as the solvent.…”

Section: Functionalized Sba For Developing Hybrid Catalysts Through Imentioning

confidence: 99%

Current advances in the utility of functionalized SBA mesoporous silica for developing encapsulated nanocatalysts: state of the art

Sadjadi

Heravi

2017

RSC Adv.

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“…The FTIR spectra showed C−H, O−O, and Mo=O stretching vibration which proved the existence of [MoO(O 2 ) 2 (phox)] moiety in the pores of Cl/SBA‐15. The UV‐Vis results indicated the host‐gest interaction has impact on the electronic energy levels of the complex . This group did a computational study of the oxidation of olefins by simplified models for [Cp*MoO 2 Cl] and [Cp*MoO(O 2 )Cl] systems to explain why [Cp*MoO 2 Cl] is effective for olefin epoxidation, whereas the peroxide analogue is catalytically inactive .…”

Section: Mo‐based Catalystsmentioning

confidence: 99%

“…The UV‐Vis results indicated the host‐gest interaction has impact on the electronic energy levels of the complex . This group did a computational study of the oxidation of olefins by simplified models for [Cp*MoO 2 Cl] and [Cp*MoO(O 2 )Cl] systems to explain why [Cp*MoO 2 Cl] is effective for olefin epoxidation, whereas the peroxide analogue is catalytically inactive . The results showed the peroxide complex [Cp*MoO(O 2 )Cl] requires higher barriers for successive steps in suggested mechanism …”

Section: Mo‐based Catalystsmentioning

confidence: 99%

“…[78] Among them, Figure 7. (a) HNTs-APTMSÀ Mo-SL, [60] (b) MoO 3 (sal-phz)/SBA-15, [61] (c) [MoO(O 2 ) 2 (phox)]/SBA-15, [62] (d) PVMo@MCM-41-Im, [63] (e) MoO 2 salAmpMCM-41, [45] (f) Mo-SBA-15, [24] (g) magMSh-bpy-MoII species, [64] (h) MSh-bpy-Mo, [65] (i) Mo-DAPSH@APTES@SiO 2 . [66]…”

Section: Sba Supported Mo-based Catalystsmentioning

confidence: 99%

“…However, surface hydroxyl groups or modified with N containing groups through SiÀ OÀ Si bond show great promises in immobilizing homogeneous Mo species. For example, Zare et al [61] successfully synthesized heterogeneous nanoscale catalyst MoO 3 (sal-phz)/ SBA-15 ( Figure 7b, Table S3, #1-6) and [MoO(O 2 ) 2 (phox)]/ SBA-15 [62] (Figure 7c, Table S3, #7-12) via anchoring of Mo complex on the chloro-functionalized SBA-15. The SEM study of MoO 3 (sal-phz)/SBA-15 indicates a good structural ordering in the sample (Figure 10d).…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

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Recent Advances in Facile Liquid Phase Epoxidation of Light Olefins over Heterogeneous Molybdenum Catalysts

Yan

Liu

Wang

et al. 2019

The Chemical Record

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Molybdenum complexes are versatile and efficient for liquid phase olefin epoxidation reactions. Rational design of catalysts is critical to achieve high atom efficiency during epoxidation processes. Although liquid phase epoxidation has been a popular topic for decades, three key issues, (a) rational control of morphology of molybdenum nanoparticles, (b) manipulating metal‐support interaction and (c) altering electronic configuration at molybdenum center remains unsolved in this area. Therefore, in this paper, we have critically revised recent research progress on heterogeneous molybdenum catalysts for facile liquid phase olefin epoxidation in terms of catalyst synthesis, surface characterization, catalytic performance and structure‐function relationship. Furthermore, plausible reaction mechanisms will be systematically discussed with the aim to provide insights into fundamental understanding on novel epoxidation chemistry.

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Immobilized Polyoxomolybdate Nanoclusters on Functionalized SBA‐15: Green Access to Efficient and Recyclable Nanocatalyst for the Epoxidation of Alkenes

et al. 2019

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A heterogeneous nanocatalyst containing polyoxomolybdate immobilized on the internal surface of amino‐functionalized SBA‐15 pores was prepared and fully characterized by several analytical techniques. The textural property of supported material was found to retain important mesoporous features, compatible with its potential use as heterogeneous catalysts. The catalyst SBA‐15‐NH3+•{Mo36}–shows excellent catalytic activity for the epoxidation of alkenes as compared to POM, which is attributed to the large specific surface area and highly ordered pore structure of SBA‐15, allowing for easy access of reactants to the active sites and removal of products. The prepared catalyst has high recyclability performance without obvious loss of activity after six runs of epoxidation.

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Heterogeneous SBA-15-supported Oxoperoxomolybdenum(VI) complex for enhanced olefin epoxidation

Cited by 14 publications

References 19 publications

Current advances in the utility of functionalized SBA mesoporous silica for developing encapsulated nanocatalysts: state of the art

Current advances in the utility of functionalized SBA mesoporous silica for developing encapsulated nanocatalysts: state of the art

Recent Advances in Facile Liquid Phase Epoxidation of Light Olefins over Heterogeneous Molybdenum Catalysts

Immobilized Polyoxomolybdate Nanoclusters on Functionalized SBA‐15: Green Access to Efficient and Recyclable Nanocatalyst for the Epoxidation of Alkenes

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