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Ultrasmall Single-chain Nanoparticles Derived from Amphiphilic Alternating Copolymers.
Macromolecular Rapid Communications 2024 April 31
The collapse or folding of an individual polymer chain into a nanoscale particle gives rise to single-chain nanoparticles (SCNPs), which share a soft nature with biological protein particles. The precise control of their properties, including morphology, internal structure, size and deformability, have been a long-standing and challenging pursuit. Herein, a new strategy based on amphiphilic alternating copolymers for producing SCNPs with ultrasmall size and uniform structure has been presented. SCNPs were obtained through folding the designed alternating copolymer in DMF and fixing it through a photocatalyzed cycloaddition reaction of anthracene units. Molecular dynamics simulation confirmed the solvophilic outer corona and solvophobic inner core structure of SCNPs. Furthermore, by adjusting the length of PEG units, precise control over the mean size of SCNPs was achieved within the range of 2.8 to 3.9 nm. These findings highlight a new synthetic strategy that enables enhanced control over morphology and internal structure while achieving ultrasmall and uniform size for SCNPs. This article is protected by copyright. All rights reserved.
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