Shen Hongqun, Liu Chun, Zheng Jun, Tao Zhu, Nie Haigen, Ni Xin-Long
Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China.
Key Laboratory of Chemical Biology and Traditional Chinese Medicine, Ministry of Educational of China, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China.
ACS Appl Mater Interfaces. 2021 Nov 24;13(46):55463-55469. doi: 10.1021/acsami.1c17666. Epub 2021 Nov 11.
A unique supramolecular approach of preparing and using a cucurbit[8]uril (Q[8])-based dynamic host-guest assembly for cyanide sensing in and removal from water has been successfully developed. The dicyanovinyl-attached cationic guest () was designed as the fluorescent response moiety for the detection of the cyanide anion via a nucleophilic addition reaction in the assist of the Q[8]-based 2:2 quaternary complexes. Furthermore, the reaction of cyanide with further switched the Q[8]-based host-guest assemblies from the 2:2 complexes to the 1:1 supramolecular polymers that precipitate in water. Thus, the macrocyclic-based dynamic host-guest assembly has potential use in applications for solving the problem of toxic anion pollutants present in aqueous environments.
一种独特的超分子方法被成功开发出来，用于制备和使用基于葫芦[8]脲（Q[8]）的动态主客体组装体，以实现水中氰化物的传感及从水中去除。连接有二氰基乙烯基的阳离子客体被设计为荧光响应部分，通过在基于Q[8]的2:2季铵配合物的辅助下的亲核加成反应来检测氰根阴离子。此外，氰化物与该客体的反应进一步将基于Q[8]的主客体组装体从2:2配合物转变为在水中沉淀的1:1超分子聚合物。因此，基于大环的动态主客体组装体在解决水环境中存在的有毒阴离子污染物问题的应用中具有潜在用途。
