MoO 2 (acac) 2 anchored on organic copolymer-inorganic hybrid zirconium phosphonate-phosphate functionalized by pyridines as highly efficient, reusable catalysts for alkene epoxidation

Huang, Jing; Li, Yuan; Cai, Jiali; Liu, Zhiguo

doi:10.1016/j.micromeso.2015.05.003

Cited by 5 publications

(3 citation statements)

References 41 publications

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“…It was then characterized by 1 H and 13 C NMR and IR. The spectra were in accordance with the literature [16] [17] [18]. 1 H NMR showed that the polyisoprene had the following composition: 10% 3.4; 20% 1.4 trans and 70% 1,4 cis.…”

Section: Purification Of Polyisoprenesupporting

confidence: 87%

“…Among the most used metals in the epoxidation of olefins, that can be either functionalized or not, are Ti, Zr, V, Mo and W [7] [14]- [23]. Molybdenum has a special catalytic importance, since its complexes are found in higher oxidation states, which facilitates the formation of catalytic species [16] Polyisoprene is obtained from the polymerization of isoprene, which leads to several isomeric structures, shown in Figure 1. The relative proportion of each isomer can be determined by 1 H-NMR [25].…”

Section: Introductionmentioning

confidence: 99%

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Effects of the Catalytic System MoO2(acac)2-TBHP in Polyisoprene Epoxidation Using Experimental Design

Gregório¹,

Barbosa-Coutinho²,

Gerbase³

et al. 2020

MSCE

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The epoxidation of polydienes yields materials with improved properties, which can be tuned by the control of the epoxidation degree. In this work, we retake a known process, the epoxidation of polyisoprene, by a different approach, in which the quantification of parameters influencing the epoxidation, such as temperature, oxidant and catalyst concentration, and reaction time degree is evaluated. We measured the influence of each parameter, allowing anyone who aims a polymer with a certain degree of epoxidation to choose which conditions are best suitable for reaching his goal.

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Section: Purification Of Polyisoprenesupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Effects of the Catalytic System MoO2(acac)2-TBHP in Polyisoprene Epoxidation Using Experimental Design

Gregório¹,

Barbosa-Coutinho²,

Gerbase³

et al. 2020

MSCE

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“…The epoxidation of cyclohexene 66 to cyclohexene oxide 67 (Scheme 19) was verified in reactions catalyzed by immobilized homogeneous molybdenum catalysts anchored on polymer-inorganic zirconium phosphonate-phosphate (ZPS-PVPA), functionalized by various pyridines (CAT25). 65 Scheme 19. Epoxidation of cyclohexene 66 catalyzed by CAT25.…”

Section: Oxidationmentioning

confidence: 99%

Metal-based catalysts containing a phosphonate moiety – from synthesis to applications in organic chemistry

Klarek¹,

Rapp²

2022

Arkivoc

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Recently, the development of suitable synthetic methodologies using metal-based catalysts for coupling reactions, oxidation or reduction as well as epoxidation have become topics of great interest. This review article surveys recent achievements in the application of such catalysts as templated porous-metal phosphonates, layered-metal phosphonates, and phosphonate-based metal-organic frameworks (MOFs) in organic syntheses. Additionally, the preparation of various catalysts with defined structure and morphology from organic phosphonate precursors are presented. The versatile properties of phosphonate-containing catalysts offer new and efficient applications in classical as well as modern organic reactions.

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Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO₂ Insertion

Haghighat

Leus

Shirini

et al. 2021

Chemistry An Asian Journal

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We clicked a salen ligand onto a thiol‐ethane bridged periodic mesoporous organosilica (Salen‐PMO) using a photo‐initiated thiol‐ene click reaction. This process resulted in a covalently bonded salen ligand on the PMO material. The final BET surface area amounts 511 m2/g and the pore size diameter is approximately 7 nm. The functionalized PMO material showed an excellent carbon dioxide uptake capacity of 1.29 mmol/g at 273 K and 1 bar. More importantly, by coordinating a MoO22+ complex onto the Salen‐PMO material, we obtained a heterogeneous catalyst with a good catalytic performance for the epoxidation of cyclohexene. The catalyst was highly reusable, as no decrease in its activity was observed for at least four runs (99% conversion). Finally, the metal‐free Salen‐PMO showed an exceptional catalytic performance in the cycloaddition of CO2 to epoxides. The obtained results clearly demonstrate the versatility of the Salen‐PMO material not only as metal‐free catalyst but also as a support material to anchor metal complexes for specific catalytic applications. With the same catalytic platform, we were able to firstly create epoxides out of alkenes, and subsequently turn these epoxides into cyclic carbonates, consuming CO2.

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MoO 2 (acac) 2 anchored on organic copolymer-inorganic hybrid zirconium phosphonate-phosphate functionalized by pyridines as highly efficient, reusable catalysts for alkene epoxidation

Cited by 5 publications

References 41 publications

Effects of the Catalytic System MoO<sub>2</sub>(acac)<sub>2</sub>-TBHP in Polyisoprene Epoxidation Using Experimental Design

Effects of the Catalytic System MoO<sub>2</sub>(acac)<sub>2</sub>-TBHP in Polyisoprene Epoxidation Using Experimental Design

Metal-based catalysts containing a phosphonate moiety – from synthesis to applications in organic chemistry

Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO₂ Insertion

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MoO 2 (acac) 2 anchored on organic copolymer-inorganic hybrid zirconium phosphonate-phosphate functionalized by pyridines as highly efficient, reusable catalysts for alkene epoxidation

Cited by 5 publications

References 41 publications

Effects of the Catalytic System MoO&lt;sub&gt;2&lt;/sub&gt;(acac)&lt;sub&gt;2&lt;/sub&gt;-TBHP in Polyisoprene Epoxidation Using Experimental Design

Effects of the Catalytic System MoO&lt;sub&gt;2&lt;/sub&gt;(acac)&lt;sub&gt;2&lt;/sub&gt;-TBHP in Polyisoprene Epoxidation Using Experimental Design

Metal-based catalysts containing a phosphonate moiety – from synthesis to applications in organic chemistry

Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO2 Insertion

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Effects of the Catalytic System MoO<sub>2</sub>(acac)<sub>2</sub>-TBHP in Polyisoprene Epoxidation Using Experimental Design

Effects of the Catalytic System MoO<sub>2</sub>(acac)<sub>2</sub>-TBHP in Polyisoprene Epoxidation Using Experimental Design

Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO₂ Insertion