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• W1996536905 abstract "Compounds L1 and L2 were obtained by reaction of 2-(bromomethyl)naphthalene with 1,4,10-trioxa-7,13-diazacyclopentadecane and 1,4,7-trioxa-10-azacyclododecane, respectively. These receptors contain aza–oxa crowns attached covalently to fluorescent groups. The protonation and coordination behaviour of L1 and L2 against metal ions has been studied in dioxane:water (70:30 v/v, 25°C, 0.1 M potassium nitrate) using potentiometric methods. All metal ions studied form complexes with L1 and L2 with the logarithm of the formation constants L+M2+=[M(L)]2+ in the sequence Cd2+≅Pb2+, Zn2+<Hg2+ for L1 and Zn2+<Ni2+<Pb2+<Cd2+<Cu2+ for L2. The fluorescent behaviour of L1 and L2 was studied in dioxane:water (70:30, v/v) and in acetonitrile in the presence of Ni2+, Cu2+, Zn2+, Cd2+, Hg2+, Pb2+ cations and chloride, bromide, sulfate and phosphate anions. The most significant feature is the quenching of the fluorescence produced by Cu2+ in acetonitrile." @default.
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• W1996536905 date "2000-07-01" @default.
• W1996536905 modified "2023-10-15" @default.
• W1996536905 title "Aza–oxa macrocyclic ligands functionalised with naphthylmethyl fluorescent groups" @default.
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• W1996536905 doi "https://doi.org/10.1016/s0277-5387(00)00475-7" @default.
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