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The complexing properties of a series of chromoionophores consisting of a C-153 coumarin linked to an aza- or diaza-crown ether are studied in acetonitrile and methanol by UV spectrometry. Cations under study are copper, nickel, zinc, cadmium and lead. The high stability constants of the complexes arise from the participation of the carbonyl group of the coumarin into the complexes and from the...
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