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• W2574109932 abstract "Perfluorochemicals (PFCs) are contaminants of serious concern because of their toxicological properties, widespread presence in drinking water sources, and incredible stability in the environment. To assess the potential application of α-, β-, and γ-cyclodextrins for PFC remediation, we investigated their complexation with linear fluorinated carboxylic acids, sulfonates, and a sulfonamide with carbon backbones ranging from C4-C9. 19F Nuclear Magnetic Resonance (NMR) spectroscopy studies demonstrated β-CD formed the strongest complexes with these PFCs. The polar head group had a modest influence, but for PFCs with backbones longer than six carbons, strong association constants are observed for 1:1 (K1:1 ∼ 105 M−1) and 2:1 (K2:1 ∼ 103 M−1) β-CD:PFC complexes. Excess β-CD can be used to complex 99.5% of the longer chain PFCs. Competition studies with adamantane-carboxylic acid and phenol confirmed the nature and persistence of the β-CD:PFC complex. Detailed analyses of the individual NMR chemical shifts and Job plots indicate the favored positions of the β-CD along the PFC chain. Solution pH, ionic strength, and the presence of humic acid have modest influence on the β-CD:PFC complexes. The strong encapsulation of PFCs by β-CD under a variety of water quality conditions demonstrates the tremendous potential of CD-based materials for the environmental remediation of PFCs." @default.
• W2574109932 created "2017-01-26" @default.
• W2574109932 creator A5018462798 @default.
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• W2574109932 date "2017-05-01" @default.
• W2574109932 modified "2023-09-27" @default.
• W2574109932 title "Detailed NMR investigation of cyclodextrin-perfluorinated surfactant interactions in aqueous media" @default.
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• W2574109932 doi "https://doi.org/10.1016/j.jhazmat.2017.01.017" @default.
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• W2574109932 hasPublicationYear "2017" @default.
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