High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis
Chiral polymers have aroused great attention in among chiral supramolecular materials based on their features. Herein, for the first time, the synthesis of chiral polymeric composites (CMNPs/1,4-Zbtb & 1,3-Zbtb) have been reported with entrapment through three strategies: ultrasonic irradiat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417721000407 |
| _version_ | 1831586311968915456 |
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| author | Zahra Sharifzadeh Kayhaneh Berijani Ali Morsali |
| author_facet | Zahra Sharifzadeh Kayhaneh Berijani Ali Morsali |
| author_sort | Zahra Sharifzadeh |
| collection | DOAJ |
| description | Chiral polymers have aroused great attention in among chiral supramolecular materials based on their features. Herein, for the first time, the synthesis of chiral polymeric composites (CMNPs/1,4-Zbtb & 1,3-Zbtb) have been reported with entrapment through three strategies: ultrasonic irradiation, solvothermal, and mechanical stirring. According to the obtained results, it is found that ultrasound-assisted synthesis can be considered as an inexpensive and efficient method than the others, from the point of view of energy and time consuming. In this strategy, encapsulation of chiral magnetic nanoparticles (CMNPs) by using tetrazole-based polymers (Zbtbs) happens, in-situly. These chiral sphere-like inorganic–organic polymers can be considered as core and shell composites with catalytic activity due to their acidic (semi unsaturated Zn: open metal sites) and basic (abundant basic nitrogens) centers. In these structures, the unprecedented chirality induction can happen from the core to shell by non-covalent interaction, easily. They could catalyze symmetric oxidation and asymmetric henry condensation to give chiral β-nitroalkanol. Circular dichroism and chiral gas chromatography were used to characterize the produced enantiomers. These chiral polymeric materials can be considered as unique acid-base bifunctional catalysts with efficient properties such as high stability, enantiomeric excess, enantioselectivity to the main product, and protecting from CMNPs leaching. |
| first_indexed | 2024-12-17T21:33:11Z |
| format | Article |
| id | doaj.art-21217bae222441c5aeb08ccd9633d67d |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-12-17T21:33:11Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-21217bae222441c5aeb08ccd9633d67d2022-12-21T21:31:48ZengElsevierUltrasonics Sonochemistry1350-41772021-05-0173105499High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysisZahra Sharifzadeh0Kayhaneh Berijani1Ali Morsali2Department of Chemistry, Faculty of Sciences, TarbiatModares University, P.O. Box 14117-13116, Tehran, Islamic Republic of IranDepartment of Chemistry, Faculty of Sciences, TarbiatModares University, P.O. Box 14117-13116, Tehran, Islamic Republic of IranCorresponding author.; Department of Chemistry, Faculty of Sciences, TarbiatModares University, P.O. Box 14117-13116, Tehran, Islamic Republic of IranChiral polymers have aroused great attention in among chiral supramolecular materials based on their features. Herein, for the first time, the synthesis of chiral polymeric composites (CMNPs/1,4-Zbtb & 1,3-Zbtb) have been reported with entrapment through three strategies: ultrasonic irradiation, solvothermal, and mechanical stirring. According to the obtained results, it is found that ultrasound-assisted synthesis can be considered as an inexpensive and efficient method than the others, from the point of view of energy and time consuming. In this strategy, encapsulation of chiral magnetic nanoparticles (CMNPs) by using tetrazole-based polymers (Zbtbs) happens, in-situly. These chiral sphere-like inorganic–organic polymers can be considered as core and shell composites with catalytic activity due to their acidic (semi unsaturated Zn: open metal sites) and basic (abundant basic nitrogens) centers. In these structures, the unprecedented chirality induction can happen from the core to shell by non-covalent interaction, easily. They could catalyze symmetric oxidation and asymmetric henry condensation to give chiral β-nitroalkanol. Circular dichroism and chiral gas chromatography were used to characterize the produced enantiomers. These chiral polymeric materials can be considered as unique acid-base bifunctional catalysts with efficient properties such as high stability, enantiomeric excess, enantioselectivity to the main product, and protecting from CMNPs leaching.http://www.sciencedirect.com/science/article/pii/S1350417721000407Chiral magnetic composite-based capsulesSonochemical irradiationGreen sustainable catalystsAcid-base bifunctional catalystsAsymmetric catalysis |
| spellingShingle | Zahra Sharifzadeh Kayhaneh Berijani Ali Morsali High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis Ultrasonics Sonochemistry Chiral magnetic composite-based capsules Sonochemical irradiation Green sustainable catalysts Acid-base bifunctional catalysts Asymmetric catalysis |
| title | High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis |
| title_full | High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis |
| title_fullStr | High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis |
| title_full_unstemmed | High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis |
| title_short | High performance of ultrasonic-assisted synthesis of two spherical polymers for enantioselective catalysis |
| title_sort | high performance of ultrasonic assisted synthesis of two spherical polymers for enantioselective catalysis |
| topic | Chiral magnetic composite-based capsules Sonochemical irradiation Green sustainable catalysts Acid-base bifunctional catalysts Asymmetric catalysis |
| url | http://www.sciencedirect.com/science/article/pii/S1350417721000407 |
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