Functionalization of magnetite–chitosan nanocomposite with molybdenum complexes: new efficient catalysts for epoxidation of olefins

Mohammadikish, Maryam; Hashemi, Shahla

doi:10.1007/s10853-018-03286-7

Cited by 23 publications

(8 citation statements)

References 36 publications

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“…For the synthesis of the magnetite supported organic-inorganic hybrids the protocol available in the literature was reproduced. [29][30][31][32][33] Moreover, the synthetic protocols for the starting products perylenediimide-dopamine (PBI-DA) and pyromellitic diimide-dopamide (PMDI-DA) ligands are also available in the literature. The new naphthalendiimide-dopamine (NDI-DA) ligand was synthesized in good yield (80%) by adding two equivalents of dopamine hydrochloride to one equivalent of 1,4,5,8-naphthalentetracarboxylic dianhydride in N,N-dimethylformamide (DMF).…”

Section: Synthesis Of the Magnetite Supported Organic-inorganic Hybrimentioning

confidence: 99%

“…Compared to other materials, the main advantages of iron oxide (Fe 3 O 4 ) magnetic NPs follow: (i) economic and easy to handle and prepare; (ii) versatile via functionalization and (iii) very easy to recuperate by means of an external magnetic field. 29 As a matter of fact, it has been recently demonstrated that hybrid nanomaterials 30 consisting of chitosan-coated magnetite nanocomposite are very convenient catalysts because of their reusability. The main advantage of these catalysts is the presence of magnetite core since it allows an easy recovery and reuse in catalytic reactions.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the aromatic surface on the capacity of adsorption of VOCs by magnetite supported organic–inorganic hybrids

et al. 2019

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It has been recently evidenced that hybrid magnetic nanomaterials based on perylene diimide (PDI) dopamine and iron oxide nanoparticles are useful for the adsorption and determination of volatile organic compounds (VOCs). However, NDI compounds are expensive and difficult to handle compared to smaller size diimides. Therefore, in this manuscript a combined experimental and theoretical investigation is reported including the analysis of the effect of changing the aromatic surface on the ability of these magnetite supported organic-inorganic hybrid nanoparticles (NPs) to adsorb several aromatic and non-aromatic VOCs. In particular, two new hybrid Fe 3 O 4 NPs are synthesized and characterized where the size of organic PDI dopamine linker is progressively reduced to naphthalene diimide (NDI) and pyromellitic diimide (PMDI). These materials were utilized to fill two sorbent tubes in series. Thermal desorption (TD) combined with capillary gas chromatography (GC)/flame detector (FID) was used to analyze both front and back tubes. Adsorption values (defined as % VOCs found in the front tube) were determined for a series of VOCs. The binding energies (DFT-D3 calculations) of VOC-Fe 3 O 4 NP complexes were also computed to correlate the electron-accepting ability of the arylene diimide (PDI, NDI or PMDI) with the adsorption capacity of the different tubes. The prepared hybrids can be easily separated magnetically and showed great reusability. † Electronic supplementary information (ESI) available: SEM micrographic images, DLS size distribution and zeta potential of all hybrid nanoparticles used in this work. 1 H-NMR and 13 C-NMR spectra of the imide-dopamine compounds and IR spectra of all compounds used in this manuscript. See Scheme 1 PMDI (1), NDI (2) and PDI (3) derivatives used to functionalize the Fe 3 O 4 NP. VOCs 4 to 9 used in this study.This journal is

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Section: Synthesis Of the Magnetite Supported Organic-inorganic Hybrimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the aromatic surface on the capacity of adsorption of VOCs by magnetite supported organic–inorganic hybrids

et al. 2019

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“…In order to solve the problem of catalyst loss, researchers designed to load the catalytic active center on the magnetic nanocarrier, which can be effectively separated under the condition of external magnetic field, so that the separation process of catalyst is more simple and more convenient. [18,[38][39] Zhang et al utilized magnetic γ-Fe 2 O 3 particles as the core, wrapped carbon materials on the surface, and then loaded the catalytic active center MoO 3 on the surface of the carbon layer by hydrothermal reaction to construct and synthesize a magnetic core-shell structure catalyst (γ-Fe 2 O 3 @C@MoO 3 ). The catalyst synthesis route is shown in Figure 8.…”

Section: Mo-based Magnetic Materialsmentioning

confidence: 99%

An Overview of Heterogeneous Transition Metal‐Based Catalysts for Cyclohexene Epoxidation Reaction

Dong,

Shao,

et al. 2023

Eur J Inorg Chem

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Cyclohexane epoxide with highly active epoxy groups is an important intermediate in the preparation of fine chemicals. However, the epoxidation path of cyclohexene is difficult to be controlled due to the allyl oxidation of cyclohexene and the ring opening of cyclohexane epoxide in the process of cyclohexene epoxidation to cyclohexane oxide. This work mainly reviewed the structure‐activity relationships and synthesis processes of a series of heterogeneous transition metal‐based catalysts based on cyclohexene epoxidation reaction, including molybdenum(Mo)‐based, tungsten(W)‐based, vanadium(V)‐based, titanium(Ti)‐based, cobalt(Co)‐based,, etc. catalysts. First, the mechanism of cyclohexene epoxidation by transition metal‐based catalysts was collated from the perspective of catalytic active centers. Then, the current status of research on cyclohexene epoxidation catalysts was summarized from the perspective of catalyst support. At the same time, the differences between alkyl hydroperoxide, hydrogen peroxide (H2O2), and oxygen (O2) as oxidants were analyzed. Finally, the main factors affecting the catalytic performance were summarized and the reasonable opinions on the design of catalysts were put forward. The above work provided some scientific support for the development of olefin epoxidation industry.

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“…[ 1 ] The industrial applications of molybdenum complexes include catalysis of a variety of chemical reactions like alkene metathesis, ammoxidation, epoxidation, hydroformylation, and chemical and photooxidation processes. [ 2,3 ] Molybdenum exists in various oxidation states among which Mo VI is the most predominant one. [ 4 ] The coordination chemistry of dioxido Mo IV complexes has aroused significant interests due to its biological relevance as molybdenum is profoundly found in biological systems.…”

Section: Introductionmentioning

confidence: 99%

Novel dioxidomolybdenum complexes containing ONO chelators: Synthesis, physicochemical properties, crystal structures, Hirshfeld surface analysis, DNA binding/cleavage studies, docking, and in vitro cytotoxicity

Vineetha

Joy

Krishna

et al. 2021

Applied Organom Chemis

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A series of dioxidomolybdenum (VI) complexes, [MoO2(ESB)H2O]·DMF (1), [MoO2(ESB)MeOH] (2), and [MoO2(ESB)H2O]·EtOH (3), containing 3‐ethoxysalicylaldehyde benzoylhydrazone have been synthesized and analysed using various spectral and analytical techniques such as elemental analyses, IR spectra, UV–Vis absorption spectra, X‐ray crystallography, and Hirshfeld surface analysis. Based on the elemental and spectral analysis, six‐coordinate geometry was assigned for these complexes wherein the hydrazone ligand binds to the metal centre in its dianionic enolate form through ONO donor set. Distorted octahedral geometry of complexes 1 and 2 was evidenced from their crystal structures, which is typical for many cis‐dioxido complexes of MoVI. The proligand and the new complexes were examined for their DNA binding, DNA cleavage, and cytotoxic properties. The DNA binding efficiency of the compounds in terms of their binding constants (Kb) of the metal complexes was observed to be 1.3727 × 105 M−1, 3.0194 × 104 M−1, and 1.13206 × 104 M−1 for [MoO2(ESB)H2O]·DMF (1), [MoO2(ESB)MeOH] (2), and [MoO2(ESB)H2O]·EtOH (3), respectively, indicating that these complexes strongly bind to DNA. To determine the binding interactions of the complexes with DNA and protein (BSA), molecular docking studies were carried out. Gel electrophoresis study reveals the fact that the complexes cleaved supercoiled pUC‐18 DNA to nicked form (Form II) in the presence and absence of H2O2. The complexes showed significantly high cytotoxicity against MCF‐7 (breast cancer cells).

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Functionalization of magnetite–chitosan nanocomposite with molybdenum complexes: new efficient catalysts for epoxidation of olefins

Cited by 23 publications

References 36 publications

Influence of the aromatic surface on the capacity of adsorption of VOCs by magnetite supported organic–inorganic hybrids

Influence of the aromatic surface on the capacity of adsorption of VOCs by magnetite supported organic–inorganic hybrids

An Overview of Heterogeneous Transition Metal‐Based Catalysts for Cyclohexene Epoxidation Reaction

Novel dioxidomolybdenum complexes containing ONO chelators: Synthesis, physicochemical properties, crystal structures, Hirshfeld surface analysis, DNA binding/cleavage studies, docking, and in vitro cytotoxicity

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