PET-RAFT Polymerization of Star Polymers with Folded ortho-Phenylene Cores.
Macromol Rapid Commun
; 44(14): e2300094, 2023 Jul.
Article
em En
| MEDLINE
| ID: mdl-37191104
ABSTRACT
ortho-Phenylenes are one of the simplest classes of aromatic foldamers, adopting helical geometries because of aromatic stacking interactions. The folding and misfolding of ortho-phenylenes are slow on the NMR timescale at or below room temperature, allowing detection of folding states using 1 H NMR spectroscopy. Herein, an ortho-phenylene hexamer is coupled with a RAFT chain transfer agent (CTA) on each repeat unit. A variety of acrylic monomers are polymerized onto the CTA-functionalized ortho-phenylene using PET-RAFT to yield functionalized star polymers with ortho-phenylene cores. The steric bulk of the acrylate monomer units as well as the chain length of each arm of the star polymer is varied. 1 H NMR spectroscopy shows that the folding of the ortho-phenylenes do not vary, providing a robust helical core for star polymer systems.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polímeros
/
Tomografia por Emissão de Pósitrons
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article