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Transition Metal Cation Binding Properties By [2+2’] p-tert-Butyl Calix[4]Arene Derivatives

Lassaad Baklouti, Jacques Vicens, Besma Mellah, Mouna Mahouachi, Amel Ben Othman, Rym Abidi

We report the metal binding properties of [2+2’] p-tert-butyl calix[4]arene derivatives (1-13) towards transition metal cations (Co2+, Ni2+ and Zn2+) The formation of ML and M2L species is observed. The formation of M2L species is detected with tetrasubstituted ligands, the most stable complexes being observed for ligand bearing at least two ethyl ester functions.