期刊
DYES AND PIGMENTS
卷 149, 期 -, 页码 626-632出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2017.11.035
关键词
beta-cyclodextrin; Azobenzene; Photoresponsive; Host-guest interactions; Hydrogen bonding
资金
- National Natural Science Foundation of China [21403010, 21676003]
- National Key R&D Program of China [2017YFB0308700]
- Technology Plan of Municipal Education Commission of Beijing [KM201510011007, KZ201510011010]
We report the photoresponsive self-assembly of a D-cyclodextrin derivative containing an azobenzene terminal group with an oligoethylene glycol linker (Azo-EG-beta CD). Azo-EG-beta CD was synthesized, and its aggregation was investigated using several techniques including TEM analysis, DLS and other spectral measurements. In a freshly prepared aqueous solution, Azo-EG-beta CD self-assembled into a network-like structure by forming intermolecular host guest inclusions that transformed into vesicles upon aging because of hydrogen bonding. Transformation from trans-azo to cis-azo using UV light induced the dissociation of azobenzene in the beta-CD cavity, and the aggregate transformed into vesicles. The construction of a photoresponsive self-assembly may provide a unimolecular host-guest complexation model in stimuli-responsive host guest self-assembly.
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