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

被引：40

作者：

Choi, HS

Lee, SC

Yamamoto, K

Yui, N

机构：

[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan

[2] Japan Adv Inst Sci & Technol, Century COE Program 21st, Nomi, Ishikawa 9231292, Japan

来源：

MACROMOLECULES | 2005年 / 38卷 / 23期

关键词：

D O I：

10.1021/ma051400f

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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.

引用

收藏

页码：9878 / 9881

页数：4

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