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Macromolecular recognition: new cyclodextrin polyrotaxanes and molecular tubes
Author(s) -
Harada Akira,
Okada Miyuko,
Kawaguchi Yoshinori,
Kamachi Mikiharu
Publication year - 1999
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199901/02)10:1/2<3::aid-pat759>3.0.co;2-s
Subject(s) - polymer , polymer chemistry , ethylene glycol , materials science , cyclodextrin , cationic polymerization , macromolecule , polyester , peg ratio , ether , polypropylene glycol , vinyl ether , organic chemistry , chemistry , monomer , polyethylene glycol , composite material , biochemistry , finance , economics
It was found that cyclodextrins (CDs, α‐, β‐ and γ‐CD) formed inclusion complexes not only with hydrophilic polymers, such as poly (ethylene glycol) (PEG), poly (propylene glycol) (PPG) and poly (methyl vinyl ether) (PMVE), but also with hydrophobic polymers, such as oligoethylene, polypropylene, polyisobutylene and polyesters. α‐CD formed complexes with oligoethylene, although β‐ and γ‐CD did not under the same conditions. γ‐CD formed complexes with polyisobutylene in high yield, although α‐CD did not. There is a good correlation between the sizes of cavities of cyclodextrins and the cross‐sectional areas of the polymers. The polymer complexes are crystalline and polyrotaxane‐type inclusion complexes. It was also found that cationic polymers such as viologen polymers and polyionenes form complexes with cyclodextrins to give soluble complexes in water. New polyrotaxanes in which many CDs are threaded on to polymer chains have been prepared by capping both polymer ends by large stoppers. Copyright © 1999 John Wiley & Sons, Ltd.