2D polymer sheets containing azobenzene are successfully prepared by a facile strategy of “2D self‐assembly polymerization (2DSP)” via free radical polymerization in solution. A bola amphiphile containing azobenzene as a novel monomer is designed and synthesized. The results indicate that single‐layer covalent pseudo‐2D polymers on a micrometer scale are obtained after polymerization with vinyl monomers. Moreover, the 2D polymer sheets are highly sensitive to UV light due to incorporation of azobenzene groups into the polymer. Upon alternative irradiation with UV and visible light, the morphological transformation between sheets and rolled‐up nanotubes can be achieved based on the reversible trans‐to‐cis photoisomerization of azobenzene units in the 2D polymer sheets.

中文翻译：

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含偶氮苯的伪2D聚合物的光诱导可逆形态转变

通过“ 2D自组装聚合（2DSP）”的可行策略，通过溶液中的自由基聚合成功地制备了包含偶氮苯的2D聚合物片材。设计并合成了一种含有偶氮苯作为新型单体的双链两亲物。结果表明，与乙烯基单体聚合后，获得了微米级的单层共价伪2D聚合物。此外，由于将偶氮苯基团引入聚合物中，因此二维聚合物片材对UV光高度敏感。在用紫外线和可见光交替照射后，可以基于二维聚合物片中偶氮苯单元的可逆的从反式到顺式的光异构化，实现片材和卷起的纳米管之间的形态转变。