Kang Yuetong, Cai Zhengguo, Huang Zehuan, Tang Xiaoyan, Xu Jiang-Fei, Zhang Xi
Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
ACS Macro Lett. 2016 Dec 20;5(12):1397-1401. doi: 10.1021/acsmacrolett.6b00871. Epub 2016 Dec 5.
In this letter, we report a new method of controllable supramolecular polymerization, taking advantage of host-enhanced photodimerization. The low-molecular-weight supramolecular oligomers were formed by noncovalent complexation between cucurbit[8]urils (CB[8]) and the bifunctional monomers (DBN) with Brooker's merocyanine moiety (MOED) on either end. Interestingly, when irradiated with UV light, the supramolecular oligomers could transform into supramolecular polymers with high molecular weight. The molecular weight of supramolecular polymers could be controlled by varying the irradiation time. It is highly anticipated that this work can enrich the methods on the modulation of supramolecular polymerization.
在本信函中，我们报道了一种利用主体增强光二聚作用的可控超分子聚合新方法。低分子量超分子低聚物由葫芦[8]脲（CB[8]）与两端带有布鲁克部花青部分（MOED）的双功能单体（DBN）通过非共价络合形成。有趣的是，当用紫外光照射时，超分子低聚物可转变为高分子量的超分子聚合物。超分子聚合物的分子量可通过改变照射时间来控制。人们高度期待这项工作能够丰富超分子聚合调控方法。
