Manganese porphines-NH2@SBA-15 as heterogeneous catalytic systems with homogeneous behavior: Effect of length of linker in immobilized manganese porphine catalysts in oxidation of olefins

Rayati, Saeed; Sheybanifard, Zahra; Amini, Mostafa M.; Aliakbari, Azam

doi:10.1016/j.molcata.2016.06.012

Cited by 14 publications

(5 citation statements)

References 47 publications

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“…In the catalytic cycle for oxidation reactions with hydrogen peroxide, two common intermediate species have been suggested in the literature. In this mechanism, hydrogen peroxide is activated by coordination to the manganese center (Scheme , I) followed by the generation of high valent Mn‐oxido species (Scheme , II) . Both intermediates are able to produce epoxide products.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a Mn‐Schiff base complex anchored on modified MCM‐41 as a novel and recyclable catalyst for oxidation of olefins

Zakeri

Rayati

Zarei

2018

Applied Organom Chemis

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Mn-Schiff base complex has been covalently attached to the surface of Mobil Composite Material No. 41 (MCM-41) using a 1,4-diisocyanatobutane (DIC-4) as a binder. The prepared heterogeneous catalyst was characterized by X-ray diffraction pattern (XRD), Brunauer-Emmett-Teller (BET), Fourier transform infrared (FT-IR) spectroscopy, X-ray fluorescence analysis (XRF), inductively coupled plasma (ICP) spectrometry and Transmission Electron Microscopy (TEM). The BET results indicated that the surface area and pore size of MCM-41 were decreased after modification. The obtained catalyst was used as a highly efficient, heterogeneous and recyclable catalyst for the oxidation of a wide range of alkenes with hydrogen peroxide (H 2 O 2 ) as a green oxidant.The effect of various parameters such as catalyst and imidazole (co-catalyst) concentration, tempreture, and reaction time on the conversion effecincy and selectivity of the reaction have been studied. The catalyst was used in five consecutive experiment without any loss of activity, confirming the success of the anchoring process and the catalyst stability.

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a Mn‐Schiff base complex anchored on modified MCM‐41 as a novel and recyclable catalyst for oxidation of olefins

Zakeri

Rayati

Zarei

2018

Applied Organom Chemis

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“…Finally, the high-valent Mn eoxo as unstable intermediate reacts rapidly with olefin to produce epoxy and carboxylic acid as a byproduct of the reaction process [19]. According to our previous studies [6,10,47,48], Mn(III) and/or Fe(III) porphyrin hydroperoxo and high-valent Mne oxo species are the main active oxidants involved in the oxidation of organic compounds with hydrogen peroxide catalyzed by manganese(III) or iron(III) porphyrins. In addition, in the presence of molecular oxygen and IBA as the reducing agent, the same species seem to be the active oxidants (Scheme 2).…”

Section: Proposed Mechanismmentioning

confidence: 99%

Mn(III)-porphyrin/graphene oxide nanocomposite as an efficient catalyst for the aerobic oxidation of hydrocarbons

Rayati

Rezaie

Nejabat

2018

Comptes Rendus. Chimie

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In this study, manganese porphyrin was grafted on the surface of graphene oxide nanosheets via covalent bonding to produce a heterogeneous catalyst. The prepared nanocomposite was characterized using X-ray diffraction, UVevis spectroscopy, scanning electron microscopy, Fourier transform infrared, and thermogravimetric analysis. Atomic absorption spectroscopy was also used to determine the amount of the loaded catalyst. The catalytic efficiency of the immobilized Mn-porphyrin was investigated for the aerobic oxidation of alkenes and saturated alkanes in acetone under mild reaction conditions. The prepared heterogenized catalyst displays superior catalytic performance as compared to the homogeneous catalyst. Moreover, the excellent turnover number (more than 31,767) achieved for the oxidation of styrene indicates the high longevity of the supported catalyst. The catalyst structure is preserved well after the oxidation reaction and is simply reused at least five times, without any significant loss of the catalytic efficiency.

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“…For example, the heme containing cytochrome is made up of complexes of iron porphyrins, vitamin B12 is made up of complexes of cobalt porphyrins and both of them have important physiological functions in biological bodies. Hemocyanin (cupric porphyrin) in animals, which exists in cytochromes, and chlorophyll (magnesium porphyrin) in plants play important roles in the oxygen-carrying respiration of blood cells and the photosynthesis of plant cells, respectively [ 16 , 17 , 18 , 19 ]. Thus, the research of simulated enzymes has aroused great interest and been developing rapidly [ 20 , 21 , 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Degradation of Triphenylmethane Dyes with an Iron Porphyrin Complex as a Cytochrome P450 Model

et al. 2023

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The organic dyes used in printing and dyeing wastewater have complex components, diverse structures and strong chemical stability, which make them not suitable for treatment and difficult to degrade in the environment. Porphyrins are macromolecules with 18 π electrons formed by four pyrrole molecules connected with a methylene bridge that has a stable structure. Porphyrin combines with iron to form an active intermediate with a structure similar to the cytochrome P450 enzyme, so they are widely used in the biomimetic field. In the current study, 5,10,15,20-tetra (4-carboxyphenyl) porphine ferric chloride (III) (Fe(III)TCPP) was used as a catalyst and iodosobenzene was used as an oxidant to explore the catalytic degradation of triphenylmethane dyes, such as rhodamine B (RhB) and malachite green (MG). The results of UV-Vis spectral analysis have shown that the conversion rate of the rhodamine B was over 90% when the amount of Fe(III)TCPP was 0.027 mM and the amount of iodosobenzene was eight equivalents. When the catalyst was 0.00681 mM and the amount of the oxidant was five equivalents, the conversion rate of the malachite green reached over 95%. This work provides a feasible method for the degradation of triphenylmethane dyes.

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Manganese porphines-NH2@SBA-15 as heterogeneous catalytic systems with homogeneous behavior: Effect of length of linker in immobilized manganese porphine catalysts in oxidation of olefins

Cited by 14 publications

References 47 publications

Synthesis and characterization of a Mn‐Schiff base complex anchored on modified MCM‐41 as a novel and recyclable catalyst for oxidation of olefins

Synthesis and characterization of a Mn‐Schiff base complex anchored on modified MCM‐41 as a novel and recyclable catalyst for oxidation of olefins

Mn(III)-porphyrin/graphene oxide nanocomposite as an efficient catalyst for the aerobic oxidation of hydrocarbons

Catalytic Degradation of Triphenylmethane Dyes with an Iron Porphyrin Complex as a Cytochrome P450 Model

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