Efficient oxidation of ethyl benzene using in situ generated molybdenum acetylide oxo-peroxo complex as recyclable catalyst

Khomane, Sonali B.; Doke, Dhananjay S.; Dongare, Mohan K.; Halligudi, S.B.; Umbarkar, Shubhangi B.

doi:10.1016/j.apcata.2016.12.003

Cited by 29 publications

(10 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, in the presence of O 2 as O-donor after 12 h in the dark (O 2 activation), the MoO 2 Cl 2 @ COMOC-4 reoxidized (spectrum (c) in Fig. 6) shows the appearance of a peroxo (O-O) group vibration at 843 cm −1 and a symmetric stretching vibration of the peroxo group entity (MoO 2 ) at 518 cm −1 [81][82][83][84]. Additionally, the signal associated to the oxo-molybdenum unit at 935 cm −1 remains unchanged.…”

Section: Liquid-phase Photo-epoxidation Of (α β)-Pinenementioning

confidence: 99%

Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework

Castellanos

Ortega

et al. 2021

Res Chem Intermed

View full text Add to dashboard Cite

A gallium-based metal-organic framework, post-modified with MoO 2 Cl 2 , was examined as a catalyst for the room temperature liquid-phase photooxidation of α-and β-pinene in the presence of molecular oxygen as the oxidant. For both substrates, (α, β)-pinene oxide was formed as the sole product due to the oxygen atom transfer process. Peroxo-molybdenum species was identified in the reoxidation process using infrared spectroscopy. Moreover, a comparison of the structure of the catalyst before and after catalysis by means of X-ray powder diffraction (XRPD), infrared spectroscopy (IR) and N 2 adsorption-desorption measurements demonstrated the high recyclability and potential of this catalyst in the photocatalytic epoxidation process of terpenes.

show abstract

Section: Liquid-phase Photo-epoxidation Of (α β)-Pinenementioning

confidence: 99%

Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework

Castellanos

Ortega

et al. 2021

Res Chem Intermed

View full text Add to dashboard Cite

show abstract

“…Acetophenone (AcPO), as an important chemical intermediate, is widely used for the synthesis of pharmaceuticals, perfumes, soaps, alcohols, resins, and other organic products in both fundamental studies and industrial applications. − Traditionally, AcPO is mainly produced by the Fiedel–Crafts acylation reaction in the presence of a stoichiometric amount of aluminum chloride as the catalyst or the catalytic oxidation of ethylbenzene (EB) with molecular oxygen using a homogeneous cobalt acetate catalyst in acetic acid media. − In addition, other homogeneous catalysts, especially various metal complexes have been applied for the oxidation of EB to AcPO. − However, these methods suffer from one or more drawbacks such as the harsh reaction conditions, expensive reagents and catalysts, generation of toxic and corrosive waste, environmentally unfriendly nature, and separation and recycling difficulty. Therefore, considerable efforts have been focused on the exploration of efficient heterogeneous catalysts toward the selective oxidation of EB with tert -butylhydroperoxide, H 2 O 2 , or molecular oxygen as the oxidant.…”

Section: Introductionmentioning

confidence: 99%

CeO₂ Nanoparticle-Decorated Co₃O₄ Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions

Liu

Meng

Jian

et al. 2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

An ideal catalytic process for the selective oxidation of hydrocarbons should employ an efficient, recyclable, and cost-effective catalyst under solvent- and additive-free conditions with molecular oxygen as the only oxidant. This is an important goal in the catalysis community and remains a significant challenge. In this respect, we report the facile construction of a series of uniform CeO2 nanoparticle-decorated Co3O4 microspheres (CeO2/Co3O4) for the selective ethylbenzene oxidation reaction by molecular oxygen. Among the catalysts with various CeO2 loading levels, CeO2/Co3O4-3 (5 wt % loading of CeO2) obtained by careful composition modulation exhibits the optimum reaction performance, with ethylbenzene conversion of 73.4% accompanied by a selectivity of 78.5% to acetophenone. The yield of acetophenone can achieve 57.6%, while the reaction rate can reach up to 401.3 mmol gcat –1 h–1. In addition, CeO2/Co3O4-3 presents robust stability and good recycling performance. The tailored CeO2/Co3O4-3 catalyst is superior to the reported catalysts, and it is the state-of-the-art catalyst under the current challenging reaction system. Experimental evidence and mechanism analysis suggest that the interface synergy featured with −Ce–OV–Co– active sites derived from the intimate connection between the two oxides is the dominant contributor in boosting the catalytic performance. This work can reinvigorate research into the exploitation of catalysts for the sustainable and green catalytic oxidation of ethylbenzene and beyond.

show abstract

“…However, SALVN fails to bind strongly with V(V) and Mo(VI), probably due to lack of o -phenol–O. V1 and V2 catalyze oxidative transformation of styrene and toluene to acetophenone, whereas M1, M2, and M3 selectively catalyze oxidation of ethylbenzene . Moreover, anticancer activities of all metal complexes and corresponding base compounds have been studied thoroughly.…”

Section: Introductionmentioning

confidence: 99%

Oxovanadium(V) and Dioxomolybdenum(VI) Complexes of Amide–Imine Conjugates: Structures, Catalytic and Antitumor Activities

Ta¹,

Ghosh²,

Salam³

et al. 2019

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

Three new amide−imine conjugates, namely [(E)-2-hydroxy-N′-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide] (SALNP), [(E)-N′-(4-(diethylamino)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide] (SALSD), and [(E)-N′-(3-ethoxy-4-hydroxybenzylidene)-2-hydroxybenzohydrazide] (SALVN), derived by reacting 2-hydroxybenzohydrazide (SAL) with three different aldehyde, 2-hydroxynapthaldehyde, 4-()-2-hydroxybenzaldehyde, and 3ethoxy-4-hydroxybenzaldehyde, respectively. Three mononuclear oxovanadium(V) and two μ oxo -bridged dinuclear molybdenum(VI) complexes have been synthesized using SALNP and SALSD. Besides, SALVN is used to prepare oxovanadium(V) and dioxomolybdenum(VI) complexes. All five metal complexes along with three amide−imine conjugates are characterized by single crystal XRD analysis. Some of them have been explored as catalyst for oxidation of alkyl benzene and styrene. Antitumor activities of the metal complexes along with ligands have been studied on Dalton lymphoma (DL) and 2PK3 murine lymphoma cells.

show abstract

Efficient oxidation of ethyl benzene using in situ generated molybdenum acetylide oxo-peroxo complex as recyclable catalyst

Cited by 29 publications

References 39 publications

Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework

Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework

CeO₂ Nanoparticle-Decorated Co₃O₄ Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions

Oxovanadium(V) and Dioxomolybdenum(VI) Complexes of Amide–Imine Conjugates: Structures, Catalytic and Antitumor Activities

Contact Info

Product

Resources

About

Efficient oxidation of ethyl benzene using in situ generated molybdenum acetylide oxo-peroxo complex as recyclable catalyst

Cited by 29 publications

References 39 publications

Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework

Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework

CeO2 Nanoparticle-Decorated Co3O4 Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions

Oxovanadium(V) and Dioxomolybdenum(VI) Complexes of Amide–Imine Conjugates: Structures, Catalytic and Antitumor Activities

Contact Info

Product

Resources

About

CeO₂ Nanoparticle-Decorated Co₃O₄ Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions