Light‐Switching Azo‐Copolymers Self‐Assembly in Multi‐Stationary States,Macromolecular Rapid Communications

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Light‐Switching Azo‐Copolymers Self‐Assembly in Multi‐Stationary States
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2019-03-07 , DOI: 10.1002/marc.201900058
Shumin Dong ₁ , Wen Sun ₂ , Dongsheng Wang _{1,

3} , Haiquan Zhao ₁ , Gen Zu ₁ , Yonghao Zheng _{1,

4}

Affiliation

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.

中文翻译：

多平稳状态下的光开关偶氮共聚物自组装

在本研究，新颖三嵌段共聚物轴承聚乙二醇（PEG），偶氮苯（AZO），和四-邻-甲氧基-取代的偶氮（梅佐）段被合成，并探讨。实现了在多平稳状态之间切换的光控PEG-PmAzo-PAzo自组装。在紫外线，蓝，绿和红光的控制下，PEG-PmAzo-PAzo在4个光平稳状态之间异构化。偶氮和mAzo顺式异构体的富集诱导了PEG-PmAzo-PAzo在甲苯中的自组装。自组装的形态和规模可以在四个固定状态之间切换，这可以通过动态光散射，扫描电子显微镜和透射电子显微镜进行研究。

更新日期：2019-03-07

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