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The self-sorting of the coordination-driven self-assembly of two-dimensional (2-D) polygons and three-dimensional (3-D) cages, which is carried out by mixing different sized ditopic bispyridyl or tritopic trispyridyl donors with a molecular clip and 60 degree acceptor is reported. In all cases, the self-sorting process is directed by the size of the donor building blocks and a dynamic, thermodynamically driven self-correction process resulting in the formation of discrete products from complex mixtures.

Bis-axially ligated iron(III) complexes of five tetra-(2,6-disubstituted phenyl)porphyrines, with 1-MeIm, 2-MeHIm, and nine substituted pyridines with pKa(PyH(super +))=9.7 to 1.1 were investigated. The high basicity pyridine complexes exhibited Curie behavior for their pyrrole-H resonance, while the lower basicity pyridine complexes showed significant deviations from simple Curie behavior that are consistent with the existence of a mixed configuration ground state and a thermally accessible excited state.