Ultrafast Xanthate‐Mediated Photoiniferter Polymerization‐Induced Self‐Assembly (PISA)

Polymerization‐induced self‐assembly (PISA) is a powerful technique for preparing block copolymer nanostructures. Recently, efforts have been focused on applying photochemistry to promote PISA due to the mild reaction conditions, low cost, and spatiotemporal control that light confers. Despite these...

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Bibliographic Details
Published in:Angewandte Chemie 2023-11, Vol.135 (48), p.n/a
Main Authors: Bowman, Jared I., Eades, Cabell B., Vratsanos, Maria A., Gianneschi, Nathan C., Sumerlin, Brent S.
Format: Article
Language:English
Subjects:
Block Copolymers
Chemistry
Micelles
Nanoparticles
Nanostructure
Photochemistry
Photolysis
Polymerization
Self-Assembly
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Summary:Polymerization‐induced self‐assembly (PISA) is a powerful technique for preparing block copolymer nanostructures. Recently, efforts have been focused on applying photochemistry to promote PISA due to the mild reaction conditions, low cost, and spatiotemporal control that light confers. Despite these advantages, chain‐end degradation and long reaction times can mar the efficacy of this process. Herein, we demonstrate the use of ultrafast photoiniferter PISA to produce polymeric nanostructures. By exploiting the rapid photolysis of xanthates, near‐quantitative monomer conversion can be achieved within five minutes to prepare micelles, worms, and vesicles at various core‐chain lengths, concentrations, or molar compositions. Ultrafast photoiniferter polymerization was explored as a strategy to produce nano‐objects via polymerization‐induced self‐assembly. By leveraging the rapid photolysis of xanthates under UV light, micelles, worms, and vesicles could be produced within 5 min by varying core‐chain length, concentration, or molar composition. Utilizing this technique, we developed a 25 g‐scale one‐pot method in which micelles were obtained within 30 min.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.202309951