Abstract
Per- and poly fluorinated alkyl substances (PFASs), notably perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid, contaminate many ground and surface water resources and are environmentally persistent. Furthermore, there are many other PFASs in use that are persistent and contaminate fresh water resources. A polymer consisting of β-cyclodextrin (β-CD) cross-linked with decafluorobiphenyl (DFB-CDP) has shown promise for sequestering PFOA at environmentally relevant concentrations, though its efficacy to remove other PFASs from water has not yet been explored. Additionally, although the DFB-CDP was designed to sequester PFASs on the basis of favorable fluorous interactions, the rationale for its relatively high affinity for PFOA compared to other previously synthesized β-CD polymers remains unknown. In this study, we explored cross-linker chemistry as a potential determinant of PFAS affinity for β-CD polymers. We synthesized three DFB-CDP derivatives with varying degrees of phenolation in the cros...
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