Aqueous seeded RAFT polymerization for the preparation of self-assemblies containing nucleobase analogues
Self-assemblies containing the nucleobase analogue 2,6-diacylaminopyridine (DAP) have been successfully prepared for the first time by aqueous seeded RAFT polymerization in high concentrations. For this purpose, a diblock copolymer containing poly(ethylene glycol) (PEG) and DAP polymethacrylate bloc...
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| Autori principali: | , , , , |
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| Natura: | Article (Journal) |
| Lingua: | inglese |
| Pubblicazione: |
2023
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| In: |
Polymer chemistry
Year: 2023, Volume: 14, Fascicolo: 1, Pages: 71-80 |
| ISSN: | 1759-9962 |
| DOI: | 10.1039/D2PY01250B |
| Accesso online: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/D2PY01250B Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2023/py/d2py01250b 
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| Note sull'autore: | Miriam Abad, Martina Nardi, Luis Oriol, Milagros Piñol and Eva Blasco |
| Riassunto: | Self-assemblies containing the nucleobase analogue 2,6-diacylaminopyridine (DAP) have been successfully prepared for the first time by aqueous seeded RAFT polymerization in high concentrations. For this purpose, a diblock copolymer containing poly(ethylene glycol) (PEG) and DAP polymethacrylate blocks was used as a macro-chain-transfer agent (PEG124-b-PDAP9-CTA) for the polymerization of 2-hydroxypropyl methacrylate (HPMA) in water. From the systematic variation of the degree of polymerization and solid concentration, a phase diagram has been generated that correlates both variables with the morphologies of this new system. Self-assemblies have been characterized by TEM and DLS, observing morphologies from low to high order (from spherical micelles to worms and to vesicles). Self-assembly morphologies are stable for almost a year, except in the case of worms that turn into spherical micelles after a few weeks. In addition, H-bonding supramolecular functionalization of the DAP repeating units during aqueous seeded RAFT polymerization has been examined by functionalization with a cross-linker with four thymine groups. Finally, the loading and the subsequent release of Nile Red have been proven in both supramolecular cross-linked and non-cross-linked self-assemblies. |
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| Descrizione del documento: | Online veröffentlicht: 22. November 2022 Gesehen am 09.03.2023 |
| Descrizione fisica: | Online Resource |
| ISSN: | 1759-9962 |
| DOI: | 10.1039/D2PY01250B |