Hydrogen-bonded supramolecular polymer networks for effective removal of perchlorate in water via clustered hydrogen-bonding
Jintao Tian, Xing Han, Haoran Yang, Juan Liu, Jinfa Chen, Tai‐Bao Wei, Hong Yao, Wenjuan Qu, Bingbing Shi, Qi Lin
Abstract
Perchlorate is a toxic, explosive, and water-soluble pollutant but while efficient and low-cost removal of ClO4− from water is an important challenge, suitable methods for precipitation of ClO4− from water are underdeveloped. Here, we demonstrate a hydrogen-bonded supramolecular polymer network crystal (HBPC) for efficient complexation of ClO4−. The HBPC network is constructed by an A,A’-bis-pyridyl-hydrazone-phenyl conjugate-functionalized pillar[5]arene (PYP5), which self-assembles via the formation of clustered hydrogen-bonds. Two-pyridyl-hydrazone moieties provide coordination sites while the eight ethoxyl moieties on the pillar[5]arene enable multiple hydrogen bonding motifs to tightly bind to the ClO4−. The HBPC network therefore adsorbs ClO4− ions and facilitates the separation of these ions from water. Perchlorate is a toxic, explosive pollutant, and is difficult to precipitate due to its water solubility. Here, the authors report a pillar[5]arene-based supramolecular polymer network that can bind with perchlorate by clustered hydrogen-bonds for removal from water.