Hydrogen-bonded supramolecular polymer networks for effective removal of perchlorate in water via clustered
Jintao Tian1, Xing Han1, Hao-Ran Yang1
1Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu, 730070, China.
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.
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