The cage effect on assembly of cyclic-bis-(zinc porphyrin) with 5,15-dipyridylporphyrin

Abstract

An inclusion complex of cyclic bis(zinc porphyrin) 1 with 5,15-dipyridylporphyrin derivative 3 has been designed and constructed. The complex formation is induced by Zn-N coordination, and is robust (K assoc ~ 10 6 L/mol) due to the presence of the cage effect of cyclic bis(zinc porphyrin). The cage-like complex as an entity is stable enough, and also convenient to achieve relative movement between the bis(zinc porphyrin) host and the dipyridylporphyrin guest connected by Zn-N coordination. The characteristics of these assemblies have been demonstrated by 1 H NMR, UV-vis, and fluorescence spectra. The results show its potential applications as a molecular gyroscope in molecular machines.cage effect, cyclic bis(zinc porphyrin), assembly, template-directed synthesis

Formation of π‐Cation Radicals in Highly Deformed Copper(II) Porphyrins: Implications for the Distortion of Natural Tetrapyrrole Macrocycles

“…The encapsulation of the pocket is also called the “cage effect“ , . The cage effect of macromolecules was discussed in our earlier paper . In theory, the cage effect has the two functions of eliminating interference from the outer species of the cage on the inner materials and eliminating the effect of the inner species on the outer materials.…”