Physical Removal of Anions from Aqueous Media by Means of a Macrocycle-Containing Polymeric Network
Physical Removal of Anions from Aqueous Media by Means of a Macrocycle-Containing Polymeric Network
复制标题
DOI：
10.1021/jacs.7b13656
复制
发表时间：
2018-02-28
影响因子：
15
通讯作者：
Sessler, Jonathan L.
中科院分区：
文献类型：
--
作者：
Ji, Xiaofan;Wu, Ren-Tsung;Sessler, Jonathan L.
本文报道了一种含有水溶性四价阳离子大环的水凝胶形成聚合物网络。在将该聚合物网络浸入含有各种无机盐和有机盐的水溶液中时，观察到物理性质的变化，这与组分阴离子吸收到聚合物网络中一致。这种吸收归因于涉及四价阳离子大环受体的主客体相互作用。然后可以通过将所得水凝胶从水相中提升出来来实现阴离子的去除。用稀HCl处理含有阴离子的水凝胶导致结合阴离子的质子化诱导释放。这允许水凝胶被回收再利用。因此，本发明的聚合物网络提供了一种从水性环境中去除不需要的阴离子的潜在有吸引力的方法。
Reported here is a hydrogel-forming polymer network that contains a water-soluble tetracationic macrocycle. Upon immersion of this polymer network in aqueous solutions containing various inorganic and organic salts, changes in the physical properties are observed that are consistent with absorption of the constituent anions into the polymer network. This absorption is ascribed to host-guest interactions involving the tetracationic macrocyclic receptor. Removal of the anions may then be achieved by lifting the resulting hydrogels out of the aqueous phase. Treating the anion containing hydrogels with dilute HCl leads to the protonation-induced release of the bound anions. This allows the hydrogels to be recycled for reuse. The present polymer network thus provides a potentially attractive approach to removing undesired anions from aqueous environments.