Contrast viscosity changes upon photoirradiation for mixtures of poly(acrylic acid)-based α-cyclodextrin and azobenzene polymers

被引：210

作者：

Tomatsu, I ^{[1
]}

Hashidzume, A ^{[1
]}

Harada, A ^{[1
]}

机构：

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

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 07期

关键词：

D O I：

10.1021/ja058345a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymer-polymer interactions were investigated for mixtures of a poly(acrylic acid) (pAA) carrying azobenzene (pC12Azo) and two kinds of pAA carrying α-cyclodextrin (CD), in which CDs are attached to the main chain through the 3- and 6-positions in CD (p3αCD and p6αCD, respectively), using several techniques, such as viscosity and NMR measurements. Viscosity data exhibited contrast changes upon UV irradiation: thinning (p3αCD/pC12Azo) and thickening (p6αCD/pC12Azo). NOESY spectra confirmed that the contrast viscosity changes were ascribable to differences in how CD moieties interact with pC12Azo after photoisomerization of azobenzene moieties from trans to cis: dissociation of inclusion complexes (p3αCD/pC12Azo) and formation of interlocked complexes (p6αCD/pC12Azo). Copyright © 2006 American Chemical Society.

引用

页码：2226 / 2227

页数：2

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