Akbarian Moghaddam, Mohadese (2021) Metal–organic frameworks and their hybridization with ionic liquids as new generation of catalysts in multi–component and oxidation reactions. Masters thesis, University of Zabol.
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Metal–organic frameworks and their hybridization with ionic liquids as new generation of catalysts in multi–component and oxidation reactions.pdf Download (647kB) | Preview |
Abstract
A new Zr-basedMOF, namely, UiO-66-Urea, was prepared through polymerization between the 2-aminoterephthalate linkers of UiO-66-NH2 MOF and 1,4-phenylene diisocyanate under mild reaction conditions. Post-synthetic coating of UiO-66-Urea with choline chloride (ChCl), as easily available, inexpensive, and nontoxic reagent, under thermal and solvent-free conditions resulted in in-situ formation of a deepeutectic solvent-like on the UiO-66-Urea’s surface, called here ChCl@UiO-66-Urea. The presence of Zr6O4(OH)4 nodes and urea groups may capable of strong hydrogen bond formation with ChCl. The porous and bioinspired ChCl@UiO-66-Urea was characterized using FT-IR, powder XRD, SEM, EDX elemental mapping, TGA, and BET surface area measurements. Choline chloride-coated UiO-66-Urea was successfully promoted one-pot three-component synthesis of 2-amino-4Hchromenes, as biologically active heterocycles, through reactions of aldehydes, malononitrile, and α-naphthol or 4-hydroxycoumarin under solvent-free conditions. The catalytic activity of the respective solid was superior than UiO-66, UiO-66-NH2, UiO-66-Urea, and even ChCl-2Urea due to synergistic effect between actives sites of UiO-66-Urea and ChCl. The reaction includes a consecutive three-step Knoevenagel condensation/Michael addition/cyclization mechanism. In the second work, an iron-based metal-organic framework was prepared under solvothermal conditions and used as a heterogeneous catalyst for the aerobic oxidation of benzyl alcohols to benzaldehydes without any additives. The catalyst was characterized using FT-IR, PXRD, SEM, EDX. The catalyst can be reused up to 3 times in the reaction.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Metal-organic frameworks, Zirconium-based MOF, Ionic liquid incorporation in MOF, Deep-eutectic solvent, 2-amino-4H-chromenes, Hybridization, Multi-component reactions (MCR), Fe-MOF, Heterogeneous catalysts, oxidative reactions |
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 01 Oct 2022 06:14 |
| Last Modified: | 01 Oct 2022 06:14 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/3082 |
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