Synthesis, Self-Assembly, and Photoresponsive Behavior of Tadpole-Shaped Azobenzene Polymers

被引：50

作者：

Wang, Xing ^{[1
]}

Yang, Yanyu ^{[1
]}

Gao, Peiyuan ^{[1
]}

Yang, Fei ^{[1
]}

Shen, Hong ^{[1
]}

Guo, Hongxia ^{[1
]}

Wu, Decheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

来源：

ACS MACRO LETTERS | 2015年 / 4卷 / 12期

关键词：

OLIGOMERIC SILSESQUIOXANE POSS; BLOCK-COPOLYMERS; SUPRAMOLECULAR AMPHIPHILE; DIBLOCK COPOLYMERS; POLYMERIZATION; PRECURSORS; DENDRIMERS; VESICLES; BREAKING; SYMMETRY;

D O I：

10.1021/acsmacrolett.5b00698

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Herein, we report a feasible method to prepare a tadpole-shaped PEG-POSS-(Azo)(7) polymer. The polymer self-assembled into a large vesicle in aqueous solution, undergoing reversible smooth-curling transformation responsive to UV and dark conditions. Incorporating POSS units into the azopolymer furnished quick trans cis isomerization along a cubic orientation. The orientational isomerization formed some pores on the vesicular membrane and endowed the highly sensitive photoresponsive property. Encapsulation of various fluorescent dyes affected the hydrophilic/hydrophobic ratio of self-assemblies, causing their morphological transition from vesicles to micelles. Response to UV irradiation, the quick trans-cis isomerization resulted in rapid release of the encapsulated dyes. The intriguing photoresponsive property renders this kind of tadpole-shaped POSS hybrid azopolymer a potential for application in controlled release of drug.

引用

页码：1321 / 1326

页数：6

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