Spectrophotometric Studies of Alkali and Alkali Earth Metal Ions Complexes of Mono Amino Derivative of Calix[4]arene

摘要

The synthesis and complexive abilities of 5,l l,17-tris(tert-butyl)-23 amino-25,26,27,28-tetra-propoxycalix[4]arene towards alkali cations Li~+, Na~+, K~+, Rb~+, Cs~+ and alkali earth cations Mg_(2+), Ca_(2+), Sr_(2+) and Ba~(2+) in methanol-chloroform mixture have been evaluated at 25°C, using UV-Vis spectrophotometric techniques. The results showed that the ligand is capable to complex with all the cations by 1 : 1 metal to ligand ratios. The selectivity presented considering the calculated formation constants are in the order Li~+ > Na~+ > K~+ > Rb~+ > Cs~+ and Mg~(2+) > Ca~(2+) > Sr~(2+) > Ba~(2+) with the ligand.