Zeolite-Y entrapped Ru(III) and Fe(III) complexes as heterogeneous catalysts for catalytic oxidation of cyclohexane reaction

Modi, Chetan K.; Trivedi, Parthiv M.

doi:10.1016/j.arabjc.2013.03.016

Cited by 15 publications

(6 citation statements)

References 30 publications

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“…The resulting solution was transferred to a 500 ml round-bottomed flask fitted with a reflux condenser, stirred vigorously and refluxed at a temperature of 100°C for 24 h. The formed dark brown precipitate is filtered, washed until pH = 7 and then dried at 120°C overnight. MnSO 4 2 .4H 2 O, to investigate the influence of the anions on the texture and the structure of the prepared K-OMS-2 materials. The procedure is completed as described for manganese sulphate, except that for manganese acetate, the nitric acid is replaced by acetic acid.…”

Section: Methodsmentioning

confidence: 99%

“…This reaction is operated in liquid phase using heterogeneous catalysts, but required high temperature (*150°C), besides high selectivity ([80 %) to the sum of cyclohexanol and cyclohexanone only could be observed at low cyclohexane conversion [1]. Modi and Trivedi, [2] studied the catalytic behaviour of zeolite-Y-entrapped Ru(III) and Fe(III) complexes over the oxidation of cyclohexane forming cyclohexanone and cyclohexanol. Zeolite-Y-entrapped Ru showed higher catalytic activity (41.1 %) with cyclohexanone (84.6 %) selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…Schurz et al [9] prepared K-OMS-2 via the reflux method and studied the influence of cationic precursors KMnO 4 and Ba(MnO4) 2 on the synthesis product and tested for the oxidation of benzyl alcohol with molecular oxygen in liquid toluene at 110°C. The catalytic activity of the K-OMS-2 is higher than Ba-OMS-2 materials, which directly correlated to their higher surface area.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of nano-structured cryptomelane materials for catalytic oxidation reactions

et al. 2016

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Manganese-based octahedral molecular sieves of the type K-OMS-2 (cryptomelane structure) were prepared via reflux method by synproportionation of KMnO 4 and Mn 2? in acidic aqueous suspension. For this method, different manganese anions (sulphate, chloride and acetate) were used, which exert a strong influence on the prepared materials. Several techniques such as X-ray diffraction, Fourier transformer infrared, Raman spectroscopy, transmission electron microscopy, differential and gravimetric thermal analysis and H 2 -temperature programmed reduction were used to characterize the prepared samples. The results revealed that the prepared samples were mainly pure mono-phase cryptomelane materials. The obtained K-OMS-2 material on using the sulphate anion has more available lattice oxygen as compared to that prepared by the other anions. The catalytic activity of the prepared samples was tested towards the oxidative dehydrogenation of cyclohexane. Over the K-OMS-2RS sample, cyclohexane conversion was significantly higher than the other prepared samples.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of nano-structured cryptomelane materials for catalytic oxidation reactions

et al. 2016

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“…The ligand (L) in the complexes had some uncoordinated donor atoms that enhanced the complexes’ operation by bonding with trace elements found in microorganisms. This could combine with the uncoordinated site and prevent microorganisms from growing [ 18 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis, spectroscopic characterization, and thermal studies of novel Schiff base complexes: theoretical simulation studies on coronavirus (COVID-19) using molecular docking

2021

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Novel Schiff base ligand was prepared by the condensation of 2,2-(ethylenedioxy)bis(ethylamine) and imidazole-2-carboxaldehyde in a 1:2 ratio, and its complexes with Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), and Cd(II) metal ions were synthesized in a 1:1 ratio. Various methods were used to identify the Schiff base ligand and complexes. Characterization techniques such as infrared, UV, and 1 H NMR spectral tests, elemental analysis, molar conductivity, magnetic properties, thermal analysis, BET surface area, and theoretically by DFT were used to help further understanding of the complex structures. For all complexes, the ligand behaved as a neutral tetradentate ligand with NOON donor atoms and spectroscopic studies indicated an octahedral structure. The electrolytic behavior of the complexes was revealed by the molar conductivity measurements. In addition, thermogravimetric analysis was used to investigate the decomposition of the complexes and Schiff base ligand. According to the results obtained, the antibacterial activity of the metal complexes is higher than that of the Schiff base ligand against one or more bacterial species. The results showed that Cd(II) complex exhibits enhanced activity against Aspergillus flavus and Ni(II) complex against Candida albicans than the standard drug ketoconazole. The Mn(II) complex had stronger activity against human breast cancer cell line (MCF-7) than the other complexes. Antiviral drug development is critical in the latest outbreak of a novel coronavirus (SARS-CoV-2). The new coronavirus was screened using molecular docking. Supplementary Information The online version contains supplementary material available at 10.1007/s13738-021-02359-w.

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“…The selective oxidation of cyclohexane to cyclohexanol and cyclohexanone is one of the important industrial application. The mixture of cyclohexanol and cyclohexanone also known as KA oil, these two oxidized products from cyclohexane are known to be main precursors for the preparation of adipic acid, caprolactam [6,7], which are the intermediates for the synthesis of nylon-6 and nylon-6,6 polymers [8,9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel transition metal complexes with L-Proline and their catalytic activity evaluation towards cyclohexane oxidation

Alrufaydi

Ahmed

Mubarak

2020

Mater. Res. Express

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Some of first row transition metals [M=Mn (II), Fe (II) and Co (II)] complexed with L-proline amino acid were synthesized by thermal heating and characterized by FT-IR, UV-visible spectroscopy, XRD, SEM and TEM. The characterization data showed that the metal ions were bonded through Nand O-donor atoms of the amino acid. The metals-L-proline complexes exist in mixed particle sizes of amorphous and agglomerated nature. The prepared complexes were investigated to catalyze the liquid phase oxidation of cyclohexane in the presence of TBHP as an oxidant. Iron-proline complex was found to be an excellent catalyst with high selectivity towards K/A oil under the optimized reaction conditions.

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Zeolite-Y entrapped Ru(III) and Fe(III) complexes as heterogeneous catalysts for catalytic oxidation of cyclohexane reaction

Cited by 15 publications

References 30 publications

Preparation of nano-structured cryptomelane materials for catalytic oxidation reactions

Preparation of nano-structured cryptomelane materials for catalytic oxidation reactions

Synthesis, spectroscopic characterization, and thermal studies of novel Schiff base complexes: theoretical simulation studies on coronavirus (COVID-19) using molecular docking

Synthesis and characterization of novel transition metal complexes with L-Proline and their catalytic activity evaluation towards cyclohexane oxidation

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