Table of Contents

The solvent extraction of metal ions by crown compounds.- Crown compounds as alkali and alkaline earth metal ion selective chromogenic reagents.- Photocontrol of ion extraction and ion transport by photofunctional crown ethers.- Macroheterocyclic ligands on polymers.- Synthesis and metal complexes of aza-macrocycles with pendant arms having additional ligating groups.- Bridged, capped and fenced porphyrins.