Light-Switching Azo-Copolymers Self-Assembly in Multi-Stationary States.

Dong, Shumin; Sun, Wen; Wang, Dongsheng; Zhao, Haiquan; Zu, Gen; Zheng, Yonghao

Dong, Shumin; Sun, Wen; Wang, Dongsheng; Zhao, Haiquan; Zu, Gen; Zheng, Yonghao.

Afiliación

Dong S; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Sun W; State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China.
Wang D; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Zhao H; State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
Zu G; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Zheng Y; School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Macromol Rapid Commun ; 40(9): e1900058, 2019 May.

Article en En | MEDLINE | ID: mdl-30844103

ABSTRACT

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.

Asunto(s)

Luz; Polímeros/química; Compuestos Azo/química; Dispersión Dinámica de Luz; Microscopía Electrónica de Rastreo; Microscopía Electrónica de Transmisión; Polietilenglicoles/química

Palabras clave

azobenzene; light-switching; self-assembly; tri-block-copolymers

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