A one-dimensional polyoxomolybdate polymer as a catalyst for the epoxidation of olefins

Najafi, Mahnaz; Abbasi, Alireza; Masteri‐Farahani, Majid; Shahbaazi, Hamidreza; Motlagh, M. Ahmadniai; Janczak, Jan

doi:10.1039/c6ra02248k

Cited by 11 publications

(10 citation statements)

References 35 publications

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“…Coordination polymers have been designed using organic ligands and catalytically active inorganic ions, such as molybdenum (VI), and applied as heterogeneous catalysts with no need of immobilization on solid supports or post‐synthetic modifications . In this regard, we reported coordination polymers based on oxomolybdenum as well as polyoxomolybdate as heterogeneous epoxidation catalysts …”

Section: Introductionsupporting

confidence: 61%

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Sonochemical Synthesis of a Nanosized Coordination Polymer with Catalytic Activity for Selective Epoxidation of Olefins

et al. 2016

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A three-dimensional coordination polymer, {(Mo 2 O 6 )(4,4'-bpy)} n (1) (4,4'-bpy = 4,4'-bipyridine), was synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction analysis, powder X-ray diffraction (XRD), Fourier transformation infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). The coordination polymer was also prepared in nanoscale via an ultrasound-assisted top-down process. The nanosized coordination polymer was characterized by means of scanning electron microscopy (SEM), XRD and FT-IR spectroscopy. The prepared oxomolybdate-based coordination polymer, in bulk and nanoscale, was applied as heterogeneous catalyst for the epoxidation of some olefins using tert-butyl hydroperoxide (TBHP) as oxidant. The 3-D coordination polymer, particularly in nanoscale, demonstrated good activity and stability in the epoxidation reaction and could be easily recovered and reused in the reaction.

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Section: Introductionsupporting

confidence: 61%

“…Moreover, cyclic olefins such as cyclooctene and cyclohexene with inner double bonds exhibit more epoxidation reactivity compared to 1‐hexene and 1‐octene with lower electron density in their terminal double bond. These results are in agreement with the previous reports …”

Section: Resultsmentioning

confidence: 99%

Sonochemical Synthesis of a Nanosized Coordination Polymer with Catalytic Activity for Selective Epoxidation of Olefins

et al. 2016

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“…The catalytic results for 3 are similar (e.g., entries 6 and 13, Table ) , or superior (e.g., entries 4 and 7–12) ,− to most of the polymeric organo-oxomolybdenum(VI) oxide hybrids reported in the literature. The only hybrids other than 3 that gave a quantitative CyO yield within 24 h were [Mo 2 O 6 (trpzH)(H 2 O) 2 ] and [(NH 4 ) 4 Mo 8 O 26 ] n (entries 5 and 14). , …”

Section: Resultsmentioning

confidence: 99%

A Molybdenum Trioxide Hybrid Decorated by 3-(1,2,4-Triazol-4-yl)adamantane-1-carboxylic Acid: A Promising Reaction-Induced Self-Separating (RISS) Catalyst

et al. 2019

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3-(1,2,4-Triazol-4-yl)adamantane-1-carboxylic acid (tradcH), a heterobifunctional organic ligand in which carboxylic acid and 1,2,4-triazole groups are united through a rigid 1,3-adamantanediyl spacer, was employed for the synthesis of a MoVI oxide organic hybrid. The ligand crystallized from water as tradcH·H2O (1), possessing a two-dimensional hydrogen-bonding network, and from ethanol as a cyclic molecular solvate with the composition (tradcH)3·2EtOH (2). Treatment of tradcH with MoO3 under hydrothermal conditions afforded a new Mo trioxide hybrid, [MoO3(tradcH)]·H2O (3), which was structurally characterized. In 3, the molybdenum atoms form a polymeric zigzag chain of {μ2-O-MoO2} n which is supported by double triazole bridges, while the carboxylic acid termini are left uncoordinated. The coordination environment of the Mo centers appears as distorted cis-{MoN2O4} octahedra. The hybrid exhibits high thermal stability (up to 270 °C) and was employed for a relatively broad scope of catalytic oxidation reactions in the liquid phase. Its catalytic behavior may be compared to a reversible mutation, featuring the best sides of homogeneous and heterogeneous catalysis. The original solid material converts into soluble active species, and the latter revert to the original material upon completion of the catalytic reaction, precipitating and allowing straightforward catalyst separation/reuse (like a heterogeneous catalyst). This catalyst was explored for a chemical reaction scope covering sulfoxidation, oxidative alcohol dehydrogenation, aldehyde oxidation, and olefin epoxidation, using hydrogen peroxide as an eco-friendly oxidant that gives water as a coproduct.

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“…[17][18][19][20][21][22][23][24][25] According to the published reports, the activity of decorated structures for proposed applications such as CO 2 capturing and catalysis is significantly enhanced due to the presence of hydroxyl group and originated electrostatic interactions. [19,20,22,25,26] As mentioned above, multi-dimensional coordination polymers are attractive candidates to be applied in different reactions as heterogeneous catalysts, for example, epoxidation, [27] alkylation, [28] esterification, [29] hydrogenation, [30] Diels-Alder, [31] Pechmann, [32] and Knoevenagel condensation. [33] The activity of these polymers is in good competition with other materials, not only by featuring high surface area and large pores, but also by bearing Lewis acidic (metal nodes) or basic sites (active functional moieties on linkers), performing appropriate electrostatic interactions.…”

Section: Introductionmentioning

confidence: 99%

A new 2D cadmium coordination polymer based on hydroxyl‐substituted benzenedicarboxylic acid as an effective heterogeneous catalyst for Knoevenagel condensation

Sefidabi

Abbasi

Mortazavi

et al. 2020

Applied Organom Chemis

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A self‐assembled new 2D cadmium network, [Cd (BDC‐OH)(DMF)2·DMF]n (Cd‐BDC‐OH), was synthesized based on 2‐hydroxyterephthalic acid (BDC‐OH) ligand and utilized as a heterogeneous catalyst for Knoevenagel condensation. The structure was fully elucidated by single‐crystal X‐ray diffraction, Hirshfeld surface analysis, powder X‐ray diffraction, field emission‐scanning electron microscopy, Fourier transform‐infrared spectroscopy and thermogravimetric analysis. The fabricated coordination polymer exhibited high catalytic activity under ambient conditions, and was used without significant drop in product yield in further cycles.

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A one-dimensional polyoxomolybdate polymer as a catalyst for the epoxidation of olefins

Abstract: A 1-D polyoxomolybdate-based polymer as heterogeneous catalyst for olefin epoxidation.

Cited by 11 publications

References 35 publications

Sonochemical Synthesis of a Nanosized Coordination Polymer with Catalytic Activity for Selective Epoxidation of Olefins

Sonochemical Synthesis of a Nanosized Coordination Polymer with Catalytic Activity for Selective Epoxidation of Olefins

A Molybdenum Trioxide Hybrid Decorated by 3-(1,2,4-Triazol-4-yl)adamantane-1-carboxylic Acid: A Promising Reaction-Induced Self-Separating (RISS) Catalyst

A new 2D cadmium coordination polymer based on hydroxyl‐substituted benzenedicarboxylic acid as an effective heterogeneous catalyst for Knoevenagel condensation

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