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Azacrownophanes were efficiently prepared by the irradiation of precursor ammonium chlorides in the presence of γ-CD (γ-cyclodextrin) in aqueous solution, by repressing the amino group-quenching effect by inclusion of the styrene moieties in γ-CD. In liquid–liquid extraction, azacrownophanes (6 and 7) showed affinity toward both Ag+ and Pb2+ cations in a series of heavy metal nitrates. Both 6 and...
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