Ship-in-a-bottle synthesis and physicochemical studies on zeolite encapsulated Mn(II), Mn(III)-semicarbazone complexes: application in the heterogeneous hydroxylation of benzene

Thabet, Mohamed S.; Ahmed, Ayman H.

doi:10.1007/s10934-012-9600-3

Cited by 13 publications

(6 citation statements)

References 52 publications

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“…Since the FTIR spectrum and XRD pattern confirmed that the crystallinity of the zeolite was retained after the encapsulation, these changes are consistent with the presence of the complexes in the zeolite supercages rather than the external surface. As shown in Table 3, the S BET value of the compound was close to the S t value, indicating the correct choice of standard t-curve [24]. A t-plot for this catalyst showed two linear regions.…”

Section: N 2 Adsorption-desorption Isothermsupporting

confidence: 52%

Encapsulation of a copper(II) tetradentate Schiff base complex in zeolite NaY: an efficient heterogeneous catalyst for the synthesis of benzimidazoles

Mobinikhaledi

Zendehdel

Ghazvini

et al. 2015

Transition Met Chem

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A copper(II) complex of 2,2 0 -(((methylenebis-(oxy))bis(2,1-phenylene))-bis(azanylylidene))bis(methanylylidene)) diphenol (H 2 L) was encapsulated in the supercages of zeolite NaY by the flexible ligand method. The resulting product was characterized by physicochemical and spectroscopic methods. The encapsulated complex and its corresponding free complex were used as catalysts for the synthesis of benzimidazoles. The results showed that the catalytic activity and stability of the complex were both increased by encapsulation. The effects of amount of catalyst, solvent, leaching and reusability of the heterogeneous catalyst were investigated.

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Section: N 2 Adsorption-desorption Isothermsupporting

confidence: 52%

Encapsulation of a copper(II) tetradentate Schiff base complex in zeolite NaY: an efficient heterogeneous catalyst for the synthesis of benzimidazoles

Mobinikhaledi

Zendehdel

Ghazvini

et al. 2015

Transition Met Chem

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“…Microanalyses (C, H) were performed as described elsewhere. 35 The IR spectrum was recorded on Thermo Scientific iS50 Fourier transform infrared (FT-IR) spectrometer using the attenuated total reflectance technique. Electronic spectra (in ethanol) were obtained using a Shimadzu (UV-1900) spectrophotometer between 200 and 1100 nm.…”

Section: Methodsmentioning

confidence: 99%

“…All reagents were of highest grade available from BDH and used without further purification. Microanalyses (C, H) were performed as described elsewhere . The IR spectrum was recorded on Thermo Scientific iS50 Fourier transform infrared (FT-IR) spectrometer using the attenuated total reflectance technique.…”

Section: Methodsmentioning

confidence: 99%

Methylenedisalicylic Acid as a Biocorrosion Inhibitor for Aluminum in Concentrated Sodium Chloride Solutions

Ahmed

Sherif

2022

ACS Omega

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3,3′-Methylenedisalicylic acid (MDS) was synthesized and ascertained on the basis of elemental analyses (C, H) and spectral measurements (IR, mass, 1 H NMR, and UV–vis). Moreover, the prepared MDS compound has been assayed for its antimicrobial action against the growth of fungi as well as Gram-positive and Gram-negative bacteria. The results demonstrated the possibility of its usefulness to restrain the growth of both fungi and bacteria, whereas MDS showed its best impact against Candida albicans . The inhibitive impact of MDS on the corrosion of aluminum (Al) in concentrated sodium chloride solution (3.5 wt % NaCl) has been investigated. The corrosion work was done by potentiodynamic cyclic polarization, electrochemical impedance spectroscopy, and chronoamperometric current–time measurements and complemented by scanning electron microscopy and energy-dispersive X-ray investigations. It was found that MDS molecules protect the aluminum against corrosion, and its ability increases with the increase of concentration from 5 × 10 –5 to 1 × 10 –4 M and further to 5 × 10 –4 M. The electrochemical results were supported by the morphological analysis and proved that the presence of MDS inhibits the uniform and pitting corrosion of Al in the chloride solutions.

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“…Complexes of Mn(II) and Mn(III) with semicarbazone ligand (SALSC) derived from salicylaldehyde and semicarbazide have been occluded in zeolite-Y super-cages by a diffusion method. The synthesized host/guest materials have been isolated and characterized by various physico-chemical techniques [43]. The results showed that, SALSC can coordinate to Mn(II) in a O,N-bidentate manner through the (C=N) and deprotonated phenolic (OH) groups forming 1M:2L occluded tetrahedral complex; and towards Mn(III) ions in a O,N,O-tridentate manner through the (C=N), deproto-nated enolic (C=O) and phenolic (OH) groups forming 1M:1L occluded penta-cordinated complex.…”

Section: Scheme 10mentioning

confidence: 99%

Transition Metal Complexes On Insoluble Support And Their Applications In Transformations Of Organic Reactions

Ahmed¹

2018

IJCTR

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In this review we present some important recent work on the catalytic action of some supported transition metal complexes. Different types of synthesized heterogeneous transition metal catalysts including anchoring transition metal complexes on polymer or silica and zeolite encapsulated complexes are discussed. An overview of their physicochemical characterization techniques are reported. The review is focused and devoted to the catalytic applications of these host-guest materials towards the transformations of some organic reactions e.g. oxidation, epoxidation, hydrolysis, ring-opening…….etc. Key word: Supported transition metal complex catalysts; organic reactions. Adsorption and desorption processes are also important elementary steps in the complicated chain of reactions that make up a typical mechanism in heterogeneous catalysis. Before the reaction can start at all, the

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Ship-in-a-bottle synthesis and physicochemical studies on zeolite encapsulated Mn(II), Mn(III)-semicarbazone complexes: application in the heterogeneous hydroxylation of benzene

Cited by 13 publications

References 52 publications

Encapsulation of a copper(II) tetradentate Schiff base complex in zeolite NaY: an efficient heterogeneous catalyst for the synthesis of benzimidazoles

Encapsulation of a copper(II) tetradentate Schiff base complex in zeolite NaY: an efficient heterogeneous catalyst for the synthesis of benzimidazoles

Methylenedisalicylic Acid as a Biocorrosion Inhibitor for Aluminum in Concentrated Sodium Chloride Solutions

Transition Metal Complexes On Insoluble Support And Their Applications In Transformations Of Organic Reactions

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