Block-selective movement of α-cyclodextrins in polyrotaxanes of PEI-b-PEG-b-PEI copolymer

Hak Soo Choi; Sang Cheon Lee; Kaori Yamamoto; Nobuhiko Yui

doi:10.1021/ma051400f

Block-selective movement of α-cyclodextrins in polyrotaxanes of PEI-b-PEG-b-PEI copolymer

Hak Soo Choi, Sang Cheon Lee, Kaori Yamamoto, Nobuhiko Yui

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

The design of a pH-sensitive polyrotaxane by end-capping the polypseudorotaxane of the PEI-b-PEG-b-PEI copolymer and α-CDs was investigated. It was found that the solubility in aqueous solution was increased by eliminating the hydrogen bonding between the α-CD by introducing tert-butoxy groups. The ph-dependent mobility of α-CDs was confirmed by spin lattice and spin-spin relaxation times for C(1)H of α-CDs. The results show that the appropriate design of stimuli-sensitive polymers and the control of interactions between the interior of cyclic compounds and a linear polymer chain may extend the scope to a variety of supramolecular assembly systems.

Original language	English
Pages (from-to)	9878-9881
Number of pages	4
Journal	Macromolecules
Volume	38
Issue number	23
DOIs	https://doi.org/10.1021/ma051400f
Publication status	Published - 15 Nov 2005

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abstract = "The design of a pH-sensitive polyrotaxane by end-capping the polypseudorotaxane of the PEI-b-PEG-b-PEI copolymer and α-CDs was investigated. It was found that the solubility in aqueous solution was increased by eliminating the hydrogen bonding between the α-CD by introducing tert-butoxy groups. The ph-dependent mobility of α-CDs was confirmed by spin lattice and spin-spin relaxation times for C(1)H of α-CDs. The results show that the appropriate design of stimuli-sensitive polymers and the control of interactions between the interior of cyclic compounds and a linear polymer chain may extend the scope to a variety of supramolecular assembly systems.",

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AU - Lee, Sang Cheon

AU - Yamamoto, Kaori

AU - Yui, Nobuhiko

PY - 2005/11/15

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AB - The design of a pH-sensitive polyrotaxane by end-capping the polypseudorotaxane of the PEI-b-PEG-b-PEI copolymer and α-CDs was investigated. It was found that the solubility in aqueous solution was increased by eliminating the hydrogen bonding between the α-CD by introducing tert-butoxy groups. The ph-dependent mobility of α-CDs was confirmed by spin lattice and spin-spin relaxation times for C(1)H of α-CDs. The results show that the appropriate design of stimuli-sensitive polymers and the control of interactions between the interior of cyclic compounds and a linear polymer chain may extend the scope to a variety of supramolecular assembly systems.

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Block-selective movement of α-cyclodextrins in polyrotaxanes of PEI-b-PEG-b-PEI copolymer

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