Zeolite Y encaged Ru(III) and Fe(III) complexes for oxidation of styrene, cyclohexene, limonene, and α-pinene: An eye-catching impact of H2SO4 on product selectivity.
Saved in:
| Title: | Zeolite Y encaged Ru(III) and Fe(III) complexes for oxidation of styrene, cyclohexene, limonene, and α-pinene: An eye-catching impact of H2SO4 on product selectivity. |
|---|---|
| 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. Jan2017 Part A, Vol. 426, p223-237. 15p. |
| Subjects: | Metal complexes, Ruthenium compounds, Zeolite Y, Oxidation, Styrene, Sulfuric acid, Cyclohexene |
| Abstract: | A novel Ru(III) and Fe(III) complexes of ligands 1 and/or 2 {where 1 = 2,2′-((1E,1′E)-((azanediylbis(ethane-2,1-diyl))bis(azanylylidene))bis(methanylylidene))diphenol and 2 = 2,2′-((1E,1′E)-((azanediylbis(ethane-2,1-diyl))bis(azanylylidene))bis(methanylylidene)) bis(4-nitrophenol)} have been synthesized as ‘neat’ and zeolite Y encapsulated complexes. These catalysts are characterized by various analytical tools such as FTIR, UV–vis, elemental analysis, ICP-AES, molar conductivity, 1 H- and 13 C NMR, TGA, SEM, AAS, BET, magnetic susceptibility and powder XRD to endorse the complex formation, absence of peripheral redundant ligands and complexes, conservation of zeolite Y morphology and crystallinity, and the encapsulation of complexes without devastation in the zeolite Y framework. Out of these synthesized catalysts, 5Y is found to be a potent candidate for styrene (Conv. 76.1%, TOF: 2130 h −1 ), cyclohexene (Conv. 84.4%, TOF: 2351 h −1 ), limonene (Conv. 81.6%, TOF: 2273 h −1 ), and α-pinene (Conv. 72.6%, TOF: 2023 h −1 ) oxidation with high selectivity of respective allylic products excluding the styrene oxidation, which undergoes epoxidation only. The addition of H 2 SO 4 in an identical reaction catalyzed by 5Y not only surge the conversion up to 100% in a short time span with high TOF but also increase the selectivity of respective epoxidation products. This switchover in the selectivities could be credited to the presence of H 2 SO 4 that facilitates the heterolytic O O bond cleavage of metal hydroperoxide and stimulates the epoxidation over allylic oxidation. Furthermore, the results establish that the heterogeneous systems are effortlessly recovered and reused without ample drop in the activity and selectivity. [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 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 119927957 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Zeolite Y encaged Ru(III) and Fe(III) complexes for oxidation of styrene, cyclohexene, limonene, and α-pinene: An eye-catching impact of H2SO4 on product selectivity. – 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>. Jan2017 Part A, Vol. 426, p223-237. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Metal+complexes%22">Metal complexes</searchLink><br /><searchLink fieldCode="DE" term="%22Ruthenium+compounds%22">Ruthenium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Zeolite+Y%22">Zeolite Y</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Styrene%22">Styrene</searchLink><br /><searchLink fieldCode="DE" term="%22Sulfuric+acid%22">Sulfuric acid</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclohexene%22">Cyclohexene</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A novel Ru(III) and Fe(III) complexes of ligands 1 and/or 2 {where 1 = 2,2′-((1E,1′E)-((azanediylbis(ethane-2,1-diyl))bis(azanylylidene))bis(methanylylidene))diphenol and 2 = 2,2′-((1E,1′E)-((azanediylbis(ethane-2,1-diyl))bis(azanylylidene))bis(methanylylidene)) bis(4-nitrophenol)} have been synthesized as ‘neat’ and zeolite Y encapsulated complexes. These catalysts are characterized by various analytical tools such as FTIR, UV–vis, elemental analysis, ICP-AES, molar conductivity, 1 H- and 13 C NMR, TGA, SEM, AAS, BET, magnetic susceptibility and powder XRD to endorse the complex formation, absence of peripheral redundant ligands and complexes, conservation of zeolite Y morphology and crystallinity, and the encapsulation of complexes without devastation in the zeolite Y framework. Out of these synthesized catalysts, 5Y is found to be a potent candidate for styrene (Conv. 76.1%, TOF: 2130 h −1 ), cyclohexene (Conv. 84.4%, TOF: 2351 h −1 ), limonene (Conv. 81.6%, TOF: 2273 h −1 ), and α-pinene (Conv. 72.6%, TOF: 2023 h −1 ) oxidation with high selectivity of respective allylic products excluding the styrene oxidation, which undergoes epoxidation only. The addition of H 2 SO 4 in an identical reaction catalyzed by 5Y not only surge the conversion up to 100% in a short time span with high TOF but also increase the selectivity of respective epoxidation products. This switchover in the selectivities could be credited to the presence of H 2 SO 4 that facilitates the heterolytic O O bond cleavage of metal hydroperoxide and stimulates the epoxidation over allylic oxidation. Furthermore, the results establish that the heterogeneous systems are effortlessly recovered and reused without ample drop in the activity and selectivity. [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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=119927957 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.molcata.2016.11.020 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 223 Subjects: – SubjectFull: Metal complexes Type: general – SubjectFull: Ruthenium compounds Type: general – SubjectFull: Zeolite Y Type: general – SubjectFull: Oxidation Type: general – SubjectFull: Styrene Type: general – SubjectFull: Sulfuric acid Type: general – SubjectFull: Cyclohexene Type: general Titles: – TitleFull: Zeolite Y encaged Ru(III) and Fe(III) complexes for oxidation of styrene, cyclohexene, limonene, and α-pinene: An eye-catching impact of H2SO4 on product selectivity. 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: 01 Text: Jan2017 Part A Type: published Y: 2017 Identifiers: – Type: issn-print Value: 13811169 Numbering: – Type: volume Value: 426 Titles: – TitleFull: Journal of Molecular Catalysis A: Chemistry Type: main |
| ResultId | 1 |
