A hierarchical zeolite-Y hampered metallo-ligand complexes for selective oxidation: A mechanistic point of view.
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| Title: | A hierarchical zeolite-Y hampered metallo-ligand complexes for selective oxidation: A mechanistic point of view. |
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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: | Microporous & Mesoporous Materials. Nov2016, Vol. 235, p233-245. 13p. |
| Subjects: | Zeolite Y, Ligands (Chemistry), Metal complexes, Oxidation, Nickel compounds, Condensation reactions |
| Abstract: | A series of Ni 2+ and Mn 2+ complexes with ligands 1 and 2 derived from the condensation of 1-(2-hydroxyphenyl)ethan-1-one and/or 1-(5-chloro-2-hydroxyphenyl)ethan-1-one with ethane-1,2-diamine have been synthesized as neat and zeolite Y enslaved complexes. The structures of these complexes were established on the basis of various physicochemical (XRD, ICP-AES, elemental analysis, BET, SEM, magnetic measurements, and TGA) and spectroscopic studies (UV–vis and FTIR). The catalytic performance of these hybrid materials was scrutinized for the oxidation of cyclohexene, phenol, styrene, and benzene using 30% H 2 O 2 as an oxidant. Among all catalysts, 3Y ably catalyzed the cyclohexene (100%), phenol (39.2%), styrene (99.3%), and benzene (20.7%) with the higher selectivity of Cyclohex-2-en-1-one (55.6%), catechol (73.2%), benzaldehyde (87.5%), and phenol (80.7%), respectively. It has been revealed that the presence of electron-withdrawing substituents on the aromatic ring of catalyst degrades the catalytic activity and the selectivity of products. The results show that the heterogeneous systems are easily salvaged and reused without substantial fall in the activity and selectivity. Moreover, the involvement of metal hydroperoxide during the catalytic reaction is confirmed by the preparation, characterization, and utilization of metal hydroperoxide of complex 4 as catalyst over phenol oxidation without oxidant. [ABSTRACT FROM AUTHOR] |
| Copyright of Microporous & Mesoporous Materials 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: 118470200 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A hierarchical zeolite-Y hampered metallo-ligand complexes for selective oxidation: A mechanistic point of view. – 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="%22Microporous+%26+Mesoporous+Materials%22">Microporous & Mesoporous Materials</searchLink>. Nov2016, Vol. 235, p233-245. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Zeolite+Y%22">Zeolite Y</searchLink><br /><searchLink fieldCode="DE" term="%22Ligands+%28Chemistry%29%22">Ligands (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+complexes%22">Metal complexes</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel+compounds%22">Nickel compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Condensation+reactions%22">Condensation reactions</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A series of Ni 2+ and Mn 2+ complexes with ligands 1 and 2 derived from the condensation of 1-(2-hydroxyphenyl)ethan-1-one and/or 1-(5-chloro-2-hydroxyphenyl)ethan-1-one with ethane-1,2-diamine have been synthesized as neat and zeolite Y enslaved complexes. The structures of these complexes were established on the basis of various physicochemical (XRD, ICP-AES, elemental analysis, BET, SEM, magnetic measurements, and TGA) and spectroscopic studies (UV–vis and FTIR). The catalytic performance of these hybrid materials was scrutinized for the oxidation of cyclohexene, phenol, styrene, and benzene using 30% H 2 O 2 as an oxidant. Among all catalysts, 3Y ably catalyzed the cyclohexene (100%), phenol (39.2%), styrene (99.3%), and benzene (20.7%) with the higher selectivity of Cyclohex-2-en-1-one (55.6%), catechol (73.2%), benzaldehyde (87.5%), and phenol (80.7%), respectively. It has been revealed that the presence of electron-withdrawing substituents on the aromatic ring of catalyst degrades the catalytic activity and the selectivity of products. The results show that the heterogeneous systems are easily salvaged and reused without substantial fall in the activity and selectivity. Moreover, the involvement of metal hydroperoxide during the catalytic reaction is confirmed by the preparation, characterization, and utilization of metal hydroperoxide of complex 4 as catalyst over phenol oxidation without oxidant. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Microporous & Mesoporous Materials 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.micromeso.2016.08.016 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 233 Subjects: – SubjectFull: Zeolite Y Type: general – SubjectFull: Ligands (Chemistry) Type: general – SubjectFull: Metal complexes Type: general – SubjectFull: Oxidation Type: general – SubjectFull: Nickel compounds Type: general – SubjectFull: Condensation reactions Type: general Titles: – TitleFull: A hierarchical zeolite-Y hampered metallo-ligand complexes for selective oxidation: A mechanistic point of view. 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: 15 M: 11 Text: Nov2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 13871811 Numbering: – Type: volume Value: 235 Titles: – TitleFull: Microporous & Mesoporous Materials Type: main |
| ResultId | 1 |
