文摘
In this work, we have focused on the synthesis of p-tert-butyl calix[4]crown with amine units (H3L) as a class of selective receptors for metal ions. The macrocyclic ligand (H3L) with N2O7 donors was synthesized via condensation between 1,3-diaminocalix[4]arene and 2-[3-(2-formylphenoxy)-2-hydroxypropoxy] benzaldehyde, followed by reduction of the Schiff base product in situ with sodium borohydride, then it was characterized by FT-IR, 1H NMR and X-ray crystallography. Two Cu(II) complexes were prepared from the reaction of H3L with Cu(II) salts (CuX2, X = ClO4− and Cl−). FT-IR, UV–Vis, elemental analysis, molar conductivity and cyclic voltammetry techniques were used for study and characterization of these complexes. On the basis of liquid–liquid extraction experiments, ligand H3L indicated good affinity toward Pb2+ and Cu2+.