A ladder-type coordination polymer constructed from two macrocyclic units – calix[4]arene tetracarboxylate and azamacrocyclic nickel(ii) complex

Abstract

The crystal structures of a new type of coordination polymer formed by the high-spin form of a hexaazamacrocyclic nickel(II) complex and a lower rim calix[4]arene tetracarboxylate trianion (2) as well as the perchlorate salt of the low-spin form of this macrocyclic cation (1) are reported. The porosity of the network is characterized by the presence of polar and non-polar voids formed by carboxylate substituents/azamacrocyclic cations and aromatic/tert-butyl substituents of the calix[4]arene, respectively.