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- W4387376429 abstract "The ubiquitous presence of per‐ and polyfluoroalkyl substances (PFAS) in aqueous environments has aroused societal concern. Nonetheless, effective sensing technologies for continuous monitoring of PFAS within water distribution infrastructures currently do not exist. Herein, we describe a ratiometric sensing approach to selectively detect aqueous perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) at concentrations of µg·L‐1. Our method relies on the excitonic transport in a highly fluorinated poly(p‐phenylene ethynylene) to amplify a ratiometric emission signal modulated by an embedded fluorinated squaraine dye. The electronic coupling between the polymer and dye occurs through overlap of π‐orbitals and is designed to such that energy transfer is dominated by an electron exchange (Dexter) mechanism. Exposure to aqueous solutions of PFAS perturbs the orbital interactions between the squaraine dye and the polymer backbone, thereby diminishing the efficiency of the energy transfer and producing a “polymer‐ON/dye‐OFF” response. These polymer/dye combinations were evaluated in spin‐coated films and polymer nanoparticles and were able to selectively detect PFAS at concentrations of ∼150 ppb and ∼50 ppb, respectively. Both polymer films and nanoparticles are not affected by the type of water, and similar responses to PFAS were found in milliQ and well water." @default.
- W4387376429 created "2023-10-06" @default.
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- W4387376429 date "2023-10-05" @default.
- W4387376429 modified "2023-10-16" @default.
- W4387376429 title "Detection of Per‐ and Polyfluoroalkyl Substances (PFAS) by Interrupted Energy Transfer" @default.
- W4387376429 doi "https://doi.org/10.1002/ange.202309928" @default.
- W4387376429 hasPublicationYear "2023" @default.
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