Synthesis and Properties of Calix[4]crown-6 Functionalized Polymers

摘要

Calix[4]crown-6-2,4-bis(4-arninobutyl ether),which has a crown-6 moiety at the 1,3-position and amino function at the 2,4-position,was prepared as an intermediate for the subsequent synthesis of calix[4]crown-6-con-taining polyamide and polyimide using adipoyl chloride and 1,2,4,5-benzenetetracarboxylic dianhydride.The chemical structures were characterized by IR,~1H NMR spectroscopy and elemental analysis,and some of their physical properties,including their thermal behavior,were examined.The ion binding characteristics of the monomer and polymers for alkali metal and alkali earth metal ions were measured by liquid-liquid extraction from the aqueous phase into the organic phase.It has been observed that polyamide has a high binding ability towards various metal cations as compared to polyimide,which showed cesium ion selectivity.