Synthesis and cation complexation of p-tert-butyl-calix[4]arene bearing two 8-hydroxyquinoline units

A new p-tert-butyl-calix[4]arene receptor containing two 8-hydroxyquinoline unit was prepared and its complexing properties toward lanthanides ions were investigated in acetonitrile by means of UV/vis spectrophotometry and conductivity methods. The stoichiometry of the formed complexes and their stability constants were also determined.