Synthesis, spectral investigation and catalytic aspects of entrapped VO(IV) and Cu(II) complexes into the supercages of zeolite-Y

Modi, Chetan K.; Gade, Bhagyashree G.; Chudasama, Jiten A.; Parmar, Digvijaysinh K.; Nakum, Haresh D.; Patel, Arun L.

doi:10.1016/j.saa.2014.12.028

Cited by 21 publications

(10 citation statements)

References 44 publications

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“…The elemental contents (C, H, N, M II ) of M II ‐complex/NaY are considerably lower relative to their values in the case of pure M II ‐complex. This decrease in element contents may be attributed to the formation of complex inside the cavities as well as in the surface of zeolite …”

Section: Resultsmentioning

confidence: 99%

New less toxic zeolite‐encapsulated Cu(II) complex nanomaterial for dual applications in biomedical field and wastewater remediation

Khalil

Kishk

EL-Mekkawi

et al. 2019

Applied Organom Chemis

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A new dual‐functional Cu(II) complex and its nanohybrid form encapsulated into NaY zeolite cavities were synthesized. The synthesized compounds were characterized using elemental analyses, X‐ray fluorescence, infrared, 1H NMR, electronic, electron spin resonance and mass spectra, powder X‐ray diffraction, surface area and transmission electron microscopy in addition to conductivity and magnetic susceptibility measurements. The encapsulated Cu(II) complex was catalytically tested for degradation of industrial wastewater. The decolorization and mineralization results indicate that the Cu(II) complex encapsulated into zeolite host is an effective heterogeneous catalyst for real industrial wastewater remediation. In addition, both free and encapsulated Cu(II) complexes were tested as anti‐microbial and anti‐tumour agents. The results show that the Cu(II) complex encapsulated into zeolite has a high activity (IC50 = 14.4 μg ml−1). The results of in vivo toxicity experiments indicate that the Cu(II) complex encapsulated into zeolite is a less toxic biocompatible material (LD50 = 1245 mg kg−1). The catalytic properties, cytotoxicity and toxicity of the new nanohybrid Cu(II) complex encapsulated into zeolite make it a promising eco‐friendly and biocompatible material for water remediation and biomedical applications.

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Section: Resultsmentioning

confidence: 99%

New less toxic zeolite‐encapsulated Cu(II) complex nanomaterial for dual applications in biomedical field and wastewater remediation

Khalil

Kishk

EL-Mekkawi

et al. 2019

Applied Organom Chemis

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“…Especially, Lunsford's and Ben Taarit's groups have explored this noteworthy field of zeolite Y encapsulated transition metal complexes way back in 1970's, and is the subject that still motivating us and remained as a foremost area of catalysis . In connection to our earlier work, herein we report the liquid phase catalytic oxidation of cyclopentanone over VO(IV) and/or Cu(II) based neat and zeolite Y entrapped complexes as catalysts using 30% H 2 O 2 as an oxygen donor. The plausible mechanism of homogeneously catalyzed heterogenized Baeyer‐Villiger oxidation of cyclopentanone is proposed in Scheme .…”

Section: Introductionmentioning

confidence: 78%

Baeyer‐Villiger oxidation of cyclopentanone over zeolite Y entrapped transition metal‐Schiff base complexes

Modi

Solanki

Vithalani

et al. 2017

Applied Organom Chemis

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Transition metal [M = VO (IV) and/or Cu (II)] complexes with Schiff base ligand, (Z)-2-((2-hydroxybenzylideneamino)phenol (H 2 L) have been entrapped in the super cages of zeolite-Y by Flexible Ligand Method. Synthesized materials have been characterized by preferential physico-chemical techniques such as inductively coupled plasma optical emission spectroscopy (ICP-OES), elemental analyses (CHN), fourier transmission infrared spectroscopy (FTIR), electronic and UVreflectance spectra, Brunauer-Emmett-Teller (BET) surface area measurements, scanning electron micrographs (SEMs), X-ray diffraction patterns (XRD) and thermogravimetric analysis (TGA). The catalytic competence of zeolite-Y entrapped transition metal complexes was examined in Baeyer-Villiger (BV) oxidation of cyclopentanone using 30% H 2 O 2 as an oxidant beside neat complexes to check the aptitude of heterogeneous catalysis over the homogeneous system. The effect of experimental variables such as mole ratio of substrate to an oxidant, amount of catalyst, reaction time, varying oxidants and solvents on the conversion of cyclopentanone was also tested. Under the optimized reaction conditions, one of the zeolite-Y entrapped transition metal complex viz. [VO(L)H 2 O]-Y [where L = (Z)-2-((2-hydroxybenzylideneamino)phenol] was found to be a potential contender by providing 80.22% conversion of cyclopentanone (TON: 10479.42), and the selectivity towards δ-valerolactone was 83.56%. KEYWORDS Baeyer-Villiger oxidation of cyclopentanone, flexible ligand method, heterogeneous catalysts, zeolite-Y entrapped transition metal complexes

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“…The higher selectivity, easy product separation, enhanced yield than the homogeneous and heterogeneous complements has made them to be explored as heterogeneous catalysts in petroleum industries, pharmaceutical applications and fine chemical productions. Several research groups have investigated the catalytic properties of the complexes entrapped within the supercages of zeolite-Y [1][2][3]. The coordination chemistry of vanadium is of great current interest due to its wide application in medicinal and catalytic systems [4].…”

Section: Introductionmentioning

confidence: 99%

Zeolite-Y encapsulated VO[2-(2′-hydroxyphenyl)benzimidazole] complex: investigation of its catalytic activity towards oxidation of organic substrates

2016

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Zeolite-Y encapsulated VO(IV)2-(2 0 -hydroxyphenyl)benzimidazole (ohpbmzl) was synthesized by flexible ligand approach and characterized using various physico-chemical techniques such as elemental analysis, XRD, inductively coupled plasma-atomic emission, fourier transform infrared spectroscopy, UV-vis-diffuse reflectance and electron paramagnetic resonance spectroscopy, thermogravimetric analysis, BET surface area and cyclic voltammetry (CV). Based on the results a square pyramidal structure was suggested for the encapsulated complex. Shift in UV absorbance to higher wavelength and variations in the redox potential values compared to the nonencapsulated complex in CV confirmed the successful encapsulation of the complex in the zeolite matrix. The catalytic efficacy was investigated towards oxidation of phenol, styrene, cyclohexane and ethyl benzene in acetonitrile using H 2 O 2 as oxidant. Influence of reaction parameters like catalyst and substrate concentration, substrate/H 2 O 2 molar ratio, and temperature were investigated to optimize the reaction conditions for maximum substrate conversion and selectivity towards desired products using the encapsulated complex. The catalytic activity was compared with vanadyl exchanged zeolite-Y (VO-Y) and non-encapsulated complex. The encapsulated complex retained its stability up to 3 runs as confirmed by recycling studies. Mechanistic pathways were proposed for all the probe reactions.

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Synthesis, spectral investigation and catalytic aspects of entrapped VO(IV) and Cu(II) complexes into the supercages of zeolite-Y

Cited by 21 publications

References 44 publications

New less toxic zeolite‐encapsulated Cu(II) complex nanomaterial for dual applications in biomedical field and wastewater remediation

New less toxic zeolite‐encapsulated Cu(II) complex nanomaterial for dual applications in biomedical field and wastewater remediation

Baeyer‐Villiger oxidation of cyclopentanone over zeolite Y entrapped transition metal‐Schiff base complexes

Zeolite-Y encapsulated VO[2-(2′-hydroxyphenyl)benzimidazole] complex: investigation of its catalytic activity towards oxidation of organic substrates

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