Novel Calixarene-Schiff Bases that Bind Silver(I) Ion

Abstract

Two novel calix[4]arene-Schiff base receptors have been synthesized. One of the new compounds has two pendant aldimines, while the second has been prepared by two-point attachment of a calixarene-dialdehyde onto a calixarene-diamine to form a “calix-tube”. Preliminary binding studies with AgClO4 show large complexation-induced shifts in 1H NMR positions