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Assembled Structures and Chiroptical Properties of Amphiphilic Block Copolymers Synthesized by RAFT Polymerization of N ‐Acryloyl‐ L ‐alanine
Author(s) -
Mori Hideharu,
Matsuyama Motonobu,
Endo Takeshi
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800254
Subject(s) - copolymer , amphiphile , polymer chemistry , chain transfer , polymerization , raft , chemistry , reversible addition−fragmentation chain transfer polymerization , acryloyl chloride , circular dichroism , radical polymerization , organic chemistry , polymer , acrylate , stereochemistry
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.