Preparation of azobenzene-containing amphiphilic diblock copolymers for light-responsive micellar aggregates

被引：396

作者：

Wang, G ^{[1
]}

Tong, X ^{[1
]}

Zhao, Y ^{[1
]}

机构：

[1] Univ Sherbrooke, Dept Chim, Sherbrooke, PQ J1K 2R1, Canada

来源：

MACROMOLECULES | 2004年 / 37卷 / 24期

关键词：

D O I：

10.1021/ma048416a

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Diblock copolymers composed of a side-chain liquid crystalline azobenzene-containing polymethacrylate and poly(tert-butyl acrylate) (PAzoMA-b-PtBA) were prepared using atom-transfer radical polymerization (ATRP). After subsequent selective hydrolysis of PtBA yielding poly(acrylic acid) (PAA), amphiphilic diblock copolymers of PAzoMA-b-PAA were obtained. Aggregation of either PAzoMA or PAA block occurs in solvents selective for one of the blocks. Adding water into dioxane solution of PAzoMA-b-PAA forms micellar aggregates due to the hydrophobic PAzoMA block. Under alternating UV and visible light illumination, reversible changes in micellar aggregates, for both core-shell micelles and vesicles, took place as a result of the reversible trans-cis photoisomerization of azobenzene mesogens in PAzoMA.

引用

页码：8911 / 8917

页数：7

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