A novel fluorescent calixarene derivative(1) with benzimidazole units as fluorophores and imino groups as ionophores at the upper rim has been synthesized in the cone conformation. Compound (1) was fully characterized by 1HNMR, 13C-NMR, IR and MS. The changes of UV-Vis spectra and fluorescent spectra upon metal ions complexation show compound (1) can selectively recognize Fe3+ and Cr3+ ions. The complexation ratio of compound (1) and Fe3+ or Cr3+ is 1:1. The association constant of compound (1) for Fe3+ was 3.4x104 and for Cr3+ was 2.8x105.
Keywords: Calixarene, benzimidazole, fluorescent, recognition, selective, metal ions
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