Tuning of the reaction parameters to optimize allylic oxidation of cyclohexene catalyzed by zeolite-Y entrapped transition metal complexes.
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| Title: | Tuning of the reaction parameters to optimize allylic oxidation of cyclohexene catalyzed by zeolite-Y entrapped transition metal complexes. |
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| Authors: | Godhani, Dinesh R.1 drgodhani@yahoo.com, Nakum, Haresh D.1, Parmar, Digvijaysinh K.1, Mehta, Jignasu P.1, Desai, Nisheeth C.1 |
| Source: | Journal of Molecular Catalysis A: Chemistry. May2016, Vol. 415, p37-55. 19p. |
| Subjects: | Transition metal complexes, Oxidation, Cyclohexene, Zeolite catalysts, Molecular size, Schiff bases |
| Abstract: | The synthetic protocols for entrapment of transition metal complexes reported here are to expand the diversity in catalysis made possible by the ability of microporous solid to select reactants, transition states, and products based on their molecular size. Herein, we report a synthetic route for the entrapment of transition metal complexes within the nanopores of zeolite-Y. The complexes of transition metals [M = Fe(II), VO(IV)] with Schiff base ligands that are synthesized by simple condensation of 2-hydroxyacetophenone and/or 2-hydroxy-5-chloroacetophenone with ethylenediamine have been entrapped within nanopores of zeolite-Y by flexible ligand method. These materials have been characterized by various physicochemical and spectroscopic techniques such as ICP-OES, FT-IR, 1 H and 13 C NMR, elemental analyzes, and UV–vis electronic spectral studies, BET, TGA, scanning electron micrographs (SEMs), X-ray diffraction patterns (XRD), conductivity, magnetic susceptibilities as well as AAS. These synthesized catalysts have been utilized as heterogeneous catalysts for liquid phase oxidation of cyclohexene. The reaction parameters have been tuned to optimize higher cyclohexene conversion (%) along with higher selectivity towards the formation of corresponding allylic products. These catalysts were recovered and reused for three times without remarkable loss of activity. Moreover, the intermediate species involved during the catalytic oxidation reaction was synthesized and identified by FTIR and UV–vis spectroscopy. [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.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 113535712 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Tuning of the reaction parameters to optimize allylic oxidation of cyclohexene catalyzed by zeolite-Y entrapped transition metal complexes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Godhani%2C+Dinesh+R%2E%22">Godhani, Dinesh R.</searchLink><relatesTo>1</relatesTo><i> drgodhani@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Nakum%2C+Haresh+D%2E%22">Nakum, Haresh D.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Parmar%2C+Digvijaysinh+K%2E%22">Parmar, Digvijaysinh K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mehta%2C+Jignasu+P%2E%22">Mehta, Jignasu P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Desai%2C+Nisheeth+C%2E%22">Desai, Nisheeth C.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Molecular+Catalysis+A%3A+Chemistry%22">Journal of Molecular Catalysis A: Chemistry</searchLink>. May2016, Vol. 415, p37-55. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Transition+metal+complexes%22">Transition metal complexes</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclohexene%22">Cyclohexene</searchLink><br /><searchLink fieldCode="DE" term="%22Zeolite+catalysts%22">Zeolite catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+size%22">Molecular size</searchLink><br /><searchLink fieldCode="DE" term="%22Schiff+bases%22">Schiff bases</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The synthetic protocols for entrapment of transition metal complexes reported here are to expand the diversity in catalysis made possible by the ability of microporous solid to select reactants, transition states, and products based on their molecular size. Herein, we report a synthetic route for the entrapment of transition metal complexes within the nanopores of zeolite-Y. The complexes of transition metals [M = Fe(II), VO(IV)] with Schiff base ligands that are synthesized by simple condensation of 2-hydroxyacetophenone and/or 2-hydroxy-5-chloroacetophenone with ethylenediamine have been entrapped within nanopores of zeolite-Y by flexible ligand method. These materials have been characterized by various physicochemical and spectroscopic techniques such as ICP-OES, FT-IR, 1 H and 13 C NMR, elemental analyzes, and UV–vis electronic spectral studies, BET, TGA, scanning electron micrographs (SEMs), X-ray diffraction patterns (XRD), conductivity, magnetic susceptibilities as well as AAS. These synthesized catalysts have been utilized as heterogeneous catalysts for liquid phase oxidation of cyclohexene. The reaction parameters have been tuned to optimize higher cyclohexene conversion (%) along with higher selectivity towards the formation of corresponding allylic products. These catalysts were recovered and reused for three times without remarkable loss of activity. Moreover, the intermediate species involved during the catalytic oxidation reaction was synthesized and identified by FTIR and UV–vis spectroscopy. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.molcata.2016.01.024 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 37 Subjects: – SubjectFull: Transition metal complexes Type: general – SubjectFull: Oxidation Type: general – SubjectFull: Cyclohexene Type: general – SubjectFull: Zeolite catalysts Type: general – SubjectFull: Molecular size Type: general – SubjectFull: Schiff bases Type: general Titles: – TitleFull: Tuning of the reaction parameters to optimize allylic oxidation of cyclohexene catalyzed by zeolite-Y entrapped transition metal complexes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Godhani, Dinesh R. – PersonEntity: Name: NameFull: Nakum, Haresh D. – PersonEntity: Name: NameFull: Parmar, Digvijaysinh K. – PersonEntity: Name: NameFull: Mehta, Jignasu P. – PersonEntity: Name: NameFull: Desai, Nisheeth C. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 13811169 Numbering: – Type: volume Value: 415 Titles: – TitleFull: Journal of Molecular Catalysis A: Chemistry Type: main |
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