Facile Synthesis of an Eight-Armed Star-Shaped Polymer via Coordination-Driven Self-Assembly of a Four-Armed Cavitand
journal contributionposted on 16.10.2018, 11:53 by Natsumi Nitta, Mei Takatsuka, Shin-ichi Kihara, Ryo Sekiya, Takeharu Haino
The polystyrene chains were installed at the lower rim of a resorcinarene-based cavitand via reversible addition–fragmentation (RAFT) polymerization to form a four-armed star-shaped polymer. A star-shaped polystyrene-functionalized supramolecular capsule was prepared through the coordination-driven self-assembly of the four-armed start-shaped polymer with silver ions. The eight-armed start-shaped supramolecular capsule encapsulated 4,4′-diacetoxybiphenyl as did a cavitand-based self-assembled capsule. A DOSY measurement indicated that the eight-armed star-shaped polymer was twice as large as the four-armed star-shaped polymer. The solution behaviors of these compounds resulted in a difference in their zero-shear viscosities.
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DOSY measurementFour-Armed Cavitandeight-armed star-shaped polymerEight-Armed Star-Shaped Polymerpolystyrene chainssilver ionsresorcinarene-based cavitandFacile Synthesisstar-shaped polystyrene-functionalized supramolecular capsulecavitand-based self-assembled capsulefour-armed star-shaped polymercoordination-driven self-assemblyCoordination-Driven Self-Assemblysolution behaviorsfour-armed start-shaped polymerzero-shear viscosities