Alkali metal ion select ability of di-propoxy- p-tert-butyl-Calix[4]arene, synthesized in acetonitrile

Synthesis and cation selectivity of 25, 27, dipropoxy-26, 28, Di-propoxy 5, 11, 17, 23, ptert- butyl Calix[4]arene are studied in acetonitrile solution. The stability constants of different complexes of Calixarene (as a ligand) with alkali metal cations are determined at 25 °C by using spectrophotometric technique.On the basis of calculations, complexation of Calixarene with Cs and Li are more favored than others. In all cases, it has been shown to form exclusively 1:1 (metal ion to ligand) complex with alkali cations in experimental condition.