1. Light‐Switching Azo‐Copolymers Self‐Assembly in Multi‐Stationary States.
- Author
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Dong, Shumin, Sun, Wen, Wang, Dongsheng, Zhao, Haiquan, Zu, Gen, and Zheng, Yonghao
- Subjects
- *
DIARYLETHENE , *TRANSMISSION electron microscopy , *POLYETHYLENE glycol , *SCANNING electron microscopy , *LIGHT scattering - Abstract
In the present research, novel tri‐block‐copolymers bearing polyethylene glycol (PEG), azobenzene (Azo), and tetra‐ortho‐methoxy‐substituted Azo (mAzo) segments are synthesized and explored. Light‐controlled PEG‐PmAzo‐PAzo self‐assemblies switching between multi‐stationary states is realized. Under controlling of UV, blue, green, and red light, PEG‐PmAzo‐PAzo isomerize between 4 photostationary states. The enrichment of cis isomers of Azo and mAzo induces the self‐assembly of PEG‐PmAzo‐PAzo in toluene. The morphologies and scale of the self‐assemblies can be switched between four stationary states, which are investigated by dynamic light scattering, scanning electron microscopy, and transmission electron microscopy. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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