Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237 (P. R. China).
Angew Chem Int Ed Engl. 2014 Dec 15;53(51):14149-52. doi: 10.1002/anie.201407402. Epub 2014 Oct 16.
Development of self-healing and photostimulated luminescent supramolecular polymeric materials is important for artificial soft materials. A supramolecular polymeric hydrogel is reported based on the host-guest recognition between a β-cyclodextrin (β-CD) host polymer (poly-β-CD) and an α-bromonaphthalene (α-BrNp) polymer (poly-BrNp) without any additional gelator, which can self-heal within only about one minute under ambient atmosphere without any additive. This supramolecular polymer system can be excited to engender room-temperature phosphorescence (RTP) signals based on the fact that the inclusion of β-CD macrocycle with α-BrNp moiety is able to induce RTP emission (CD-RTP). The RTP signal can be adjusted reversibly by competitive complexation of β-CD with azobenzene moiety under specific irradiation by introducing another azobenzene guest polymer (poly-Azo).
自修复和光致发光超分子聚合物材料的开发对于人工软材料非常重要。本文报道了一种基于β-环糊精（β-CD）主体聚合物（聚-β-CD）和α-溴代萘（α-BrNp）聚合物（聚-BrNp）之间主客体识别的超分子聚合物水凝胶，无需任何额外的凝胶剂，在环境气氛下仅需约 1 分钟即可自行修复，无需任何添加剂。基于β-CD 大环与α-BrNp 部分包含能够诱导室温磷光（RTP）发射（CD-RTP）的事实，该超分子聚合物体系可以被激发产生室温磷光（RTP）信号。通过引入另一个具有偶氮苯基团的客体聚合物（聚-Azo），在特定的辐照下，β-CD 与偶氮苯基团的竞争性络合可以使 RTP 信号可逆调节。
