Hydrogen-bonded polymer complexes of macrocycles containing a pyridyl moiety and carboxyl-functionalized polystyrenes
An approach to H-bonded rotaxanes |
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Authors: | Osamu Ihata Takashi Kato |
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Affiliation: | (1) Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan, JP |
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Abstract: | Summary
Copolystyrenes complexed with macrocyclic compounds through hydrogen bonding have been synthesized by the copolymerization
of styrene with the complex of 4-vinylbenzoic acid and crown ethers containing a 2,6-pyridyl moiety. The glass transition
temperatures of the copolymeric complexes are significantly lower than that of the simple copolymer, which shows that the
carboxylic acid groups in the polymer backbone do not intermolecularly dimerize. The UV absorption spectra of polymeric complexes
suggest that they have complex structures similar to that of the low-molecular-weight complexes of 4-ethylbenzoic acid and
the crown ethers.
Received: 31 March 1999/Accepted: 27 April 1999 |
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