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One‐Pot Synthesis of a Polyrotaxane via Selective Threading of a PEI‐ b ‐PEG‐ b ‐PEI Copolymer
Author(s) -
Choi Hak Soo,
Ooya Tooru,
Yui Nobuhiko
Publication year - 2006
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200600024
Subject(s) - copolymer , peg ratio , polymer chemistry , aqueous solution , chemistry , cyclodextrin , materials science , organic chemistry , polymer , finance , economics
Summary: A functional polyrotaxane of a PEI‐ b ‐PEG‐ b ‐PEI copolymer is synthesized in aqueous solution in a one‐pot sequence. To obtain a polyrotaxane with PEG‐block‐selective inclusion complexes, the solution pH of the polypseudorotaxane is lowered to 4.4 in the presence of 9‐anthraldehyde (AN), which triggers the expulsion of the α ‐cyclodextrins ( α ‐CDs) from the flank PEI chains.Synthetic strategy of a block‐selective polyrotaxane between a PEI‐ b ‐PEG‐ b ‐PEI copolymer and α ‐cyclodextrins.
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