✦ LIBER ✦

Assembled Structures and Chiroptical Properties of Amphiphilic Block Copolymers Synthesized by RAFT Polymerization of N-Acryloyl-L-alanine

✍ Scribed by Hideharu Mori; Motonobu Matsuyama; Takeshi Endo

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 350 KB
Volume: 209
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.200800254

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✦ Synopsis

Abstract

Amino acid‐based amphiphilic block copolymers involving poly(N‐acryloyl‐L‐alanine), poly(A‐Ala‐OH), which exhibits a characteristic chiroptical property and pH‐dependent solubility, have been synthesized by reversible addition‐fragmentation chain transfer (RAFT) polymerization. The direct polymerization of A‐Ala‐OH without any protecting chemistry using the dithiocarbamate‐terminated polystyrene or poly(N‐acryloyl‐L‐phenylalanine methyl ester) as a macrochain transfer agent produced well‐defined amphiphilic block copolymers. The self‐assembly behaviors and chiroptical properties of these amphiphilic block copolymers in selective solvents were investigated by dynamic light scattering, circular dichroism, and UV–Vis spectroscopic methods.

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