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Heterogeneous catalysts hold the edge over homogeneous systems: Zeolite-Y encapsulated complexes for Baeyer-Villiger oxidation of cyclohexanone.

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Title: Heterogeneous catalysts hold the edge over homogeneous systems: Zeolite-Y encapsulated complexes for Baeyer-Villiger oxidation of cyclohexanone.
Authors: Mehta, Jignasu P.1 jpm1569@gmail.com, Parmar, Digvijaysinh K.1, Godhani, Dinesh R.1, Nakum, Haresh D.1, Desai, Nisheeth C.1
Source: Journal of Molecular Catalysis A: Chemistry. Sep2016, Vol. 421, p178-188. 11p.
Subjects: Heterogeneous catalysis, Zeolite Y, Baeyer-Villiger rearrangement, Cyclohexanones, Metal complexes, Thermogravimetry
Abstract: A series of heterogeneous catalysts [M(pamp)]-Y (Where, M = V, Mn, Fe or Cu; pamp = 2,2′-((1 E ,1′ E )-(1,2-phenylenebis(azanylylidene))bis(methanylylidene))diphenol) was prepared by encapsulation of metal complexes within zeolite-Y. Synthesized materials were characterized by chemical, BET and thermogravimetric (TG) analysis, X-ray diffraction (XRD), UV–vis and infrared spectroscopies, and scanning electron microscopy (SEM). Zeolite-Y encapsulated complexes were tested in Baeyer-Villiger (B-V) oxidation of cyclohexanone beside neat complexes to check the aptitude of heterogeneous catalysis over the homogeneous system. The effect of experimental variables viz., solvents, catalysts amount, the mole ratio of substrate to an oxidant, temperature and reaction time on substrate conversion was also tested. Under the optimized reaction conditions, [VO(pamp)]-Y was found to be a potential candidate by providing 1500 TONs in cyclohexanone oxidation, and the selectivity towards ε -caprolactone was 85.2%. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Molecular Catalysis A: Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Heterogeneous catalysts hold the edge over homogeneous systems: Zeolite-Y encapsulated complexes for Baeyer-Villiger oxidation of cyclohexanone.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Molecular+Catalysis+A%3A+Chemistry%22">Journal of Molecular Catalysis A: Chemistry</searchLink>. Sep2016, Vol. 421, p178-188. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Heterogeneous+catalysis%22">Heterogeneous catalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Zeolite+Y%22">Zeolite Y</searchLink><br /><searchLink fieldCode="DE" term="%22Baeyer-Villiger+rearrangement%22">Baeyer-Villiger rearrangement</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclohexanones%22">Cyclohexanones</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+complexes%22">Metal complexes</searchLink><br /><searchLink fieldCode="DE" term="%22Thermogravimetry%22">Thermogravimetry</searchLink>
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  Data: A series of heterogeneous catalysts [M(pamp)]-Y (Where, M = V, Mn, Fe or Cu; pamp = 2,2′-((1 E ,1′ E )-(1,2-phenylenebis(azanylylidene))bis(methanylylidene))diphenol) was prepared by encapsulation of metal complexes within zeolite-Y. Synthesized materials were characterized by chemical, BET and thermogravimetric (TG) analysis, X-ray diffraction (XRD), UV–vis and infrared spectroscopies, and scanning electron microscopy (SEM). Zeolite-Y encapsulated complexes were tested in Baeyer-Villiger (B-V) oxidation of cyclohexanone beside neat complexes to check the aptitude of heterogeneous catalysis over the homogeneous system. The effect of experimental variables viz., solvents, catalysts amount, the mole ratio of substrate to an oxidant, temperature and reaction time on substrate conversion was also tested. Under the optimized reaction conditions, [VO(pamp)]-Y was found to be a potential candidate by providing 1500 TONs in cyclohexanone oxidation, and the selectivity towards ε -caprolactone was 85.2%. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Journal of Molecular Catalysis A: Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.molcata.2016.05.016
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        Text: English
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        PageCount: 11
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      – SubjectFull: Heterogeneous catalysis
        Type: general
      – SubjectFull: Zeolite Y
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      – SubjectFull: Baeyer-Villiger rearrangement
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      – SubjectFull: Cyclohexanones
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      – SubjectFull: Metal complexes
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      – SubjectFull: Thermogravimetry
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      – TitleFull: Heterogeneous catalysts hold the edge over homogeneous systems: Zeolite-Y encapsulated complexes for Baeyer-Villiger oxidation of cyclohexanone.
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              Text: Sep2016
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