CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, P. R. China.
Institute of Material Science and Information Technology, Anhui University, Hefei, 230601, P. R. China.
Macromol Rapid Commun. 2018 Jun;39(11):e1700880. doi: 10.1002/marc.201700880. Epub 2018 May 2.
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.
二维聚合物片包含偶氮苯是成功地通过“二维自组装聚合(2DSP)”的自由基聚合在溶液中制备的一种简单的策略。含有偶氮苯作为一个新的单体的bola 两亲物被设计和合成。结果表明，单一层压的共价伪二维聚合物在微米尺度上得到聚合后的乙烯基单体。此外，由于偶氮苯基团的掺入，二维聚合物片对紫外光具有高度的敏感性。在紫外光和可见光的交替照射下，基于二维聚合物片中亚苄基单元的可逆反式-顺式光异构化，可以实现片状和卷成纳米管之间的形态转变。
