Thermal and photochemical switching of conformation of poly(ethylene glycol)-substituted cyclodextrin with an azobenzene group at the chain end

被引：141

作者：

Inoue, Youhei ^{[1
]}

Kuad, Paul ^{[1
]}

Okumura, Yasushi ^{[1
]}

Takashima, Yoshinori ^{[1
]}

Yamaguchi, Hiroyasu ^{[1
]}

Harada, Akira ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Sci, Dept Macromol Sci, Toyonaka, Osaka 5600043, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 20期

关键词：

D O I：

10.1021/ja071717q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Poly(ethylene glycol) (PEG)-substituted cyclodextrin (CD) with an azobenzene group at the terminal of the PEG chain (6-Az-PEG600-HyCiO-beta-CD) was synthesized. The conformation of 6-Az-PEG600-HyCiO-beta-CD in aqueous solution could be controlled thermally and photochemically. At low concentration, 6-trans-Az-PEG600-HyCiO-beta-CD formed different types of self-inclusion complexes or existed in a dethreading form depending on the temperature, while at high concentration, an intermolecular complex was formed. Moreover, UV-light irradiation induced a conformational change to a self-inclusion complex where the CD cavity included the azobenzene part regardless of the concentration.

引用

页码：6396 / +

页数：3

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