A C-shaped p-sulfonatocalixarene-based supermolecule exhibiting mutual-inclusion and bilayer insertion of dipicolinate†
A p-sulfonatocalixarene-based supermolecule, [Ce3(PDA)4(C4AS)2·13H2O](NO3)·25H2O 1 was prepared by slow evaporation of a solution of Ce(NO3)3·6H2O, 2,6-pyridinedicarboxylic acid (PDA) and pentasodium p-sulfonatocalixarene salt. The molecular and crystal structure of 1 was determined by single crystal X-ray structural analysis and characterized by thermal methods (TG, DSC and hot-stage microscopy) and Hirshfeld analysis. The supermolecule is C-shaped with alternating calixarene and PDA ligands linked to three Ce(III) cations. The supermolecules exhibit mutual-inclusion via its PDA ligands with the remaining PDA ligands inserted into the calixarene bilayer. The bilayer consists of an “up–down” arrangement of calixarenes, with the inserted PDA ligands effecting a zig-zag propagation of the calixarenes within the bilayer.
- This article is part of the themed collection: Structural Macrocyclic Supramolecular Chemistry