Abstract
Di-amido-derivatives of 1,1′-methylene-bis(2-naphthol) (mbn), viz.; L1 to L6 and L7, have been synthesized and characterized. The single crystal X-ray structure of L2 has been established. All these derivatives have been studied for metal ion recognition by fluorescence and absorption techniques. Among these, L6 and L7 were found to be selective towards Cu2+ even in the presence of other metal ions in aqueous acetonitrile owing to the presence of the N,O-binding core up to the lowest concentration of 210 ± 11 and 144 ± 3 ppb, respectively. The binding region has been identified by 1H NMR studies. The proposed mode of binding has been modelled by DFT computations.
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