Supramolecular systems constructed from Crownphthalocyaninates

A review of coordination compounds of several metals (Co²⁺, Ru²⁺, Zn²⁺, Al³⁺, Y³⁺, Ln³⁺ = La, Gd, Yb, Lu) with tetra-crown-substituted phthalocyanine H₂R₄Pc (R₄Pc²⁻ = [4,5,4′,5′,4′′,5′′,4′′′,5′′′-tetrakis(1,4,7,10,13-pentaoxotridecamethylen)phthalocyaninate-ion]) has been presented. The syntheses of compounds with a given tetra-azamacrocyclic ligand are described. The template method based on the crown-substituted phthalodinitrile is the optimum technique for preparation of Ru²⁺ monophthalocyaninate and sandwich complexes of Lu³⁺. For other rare earth metals the new synthetic approach based on the application of the H₂R₄Pc ligand has been suggested. Some aspects of supramolecular chemistry including cation-induced aggregation in solutions have been discussed for the compounds of this class.