No abstract

A cationic COF removes carcinogenic bromate with a remarkable rate constant of 191.45 g mg−1 min−1.

On account of its non-biodegradable nature and persistence in the environment, perfluorooctanoic acid (PFOA) accumulates in water resources and poses serious environmental issues in many parts of the world. Here, we present the development of two fluorine-rich calix[4]arene-based porous polymers, FCX4-P and FCX4-BP, and demonstrate their utility for the efficient removal of PFOA from water. These materials featured BET surface areas of up to 450 m 2 g -1 , which is slightly lower than their non-fluorinated counterparts (up to 596 m 2 g -1 ). FCX4-P removes PFOA at environmentally relevant concentrations with a high rate constant of 3.80 g mg -1 h -1 and reaches an exceptional maximum PFOA uptake capacity of 188.7 mg g -1 . In addition, it can be regenerated by simple methanol wash and reused without a significant decrease in performance. ASSOCIATED CONTENT Supporting InformationThe Supporting Information is available free of charge on the ACS Publications website.