Synthesis and characterization of aryl ether derivatives of p-tert-butyl calix[4]arenes as a capable receptors of Ag+ and Pb+2 ions

The synthesis and characterization some tetra-aryloxy derivatives of calix[4]arenes have been reported in this paper for promoting of cation binding activities. Obtained receptores have been characterized by 1HNMR, 13CNMR and FTIR. The Calix[4]arene structures were extended via lower rim by etherification and sulfoesterification and the ionophoric capability of synthetic receptors were investigated toward Ag+ and Pb+2 cations by spectroscopic methods.