Tuning Solid-State Calix[n]arene Supramolecular Assemblies Using Phenanthroline as the Guest Molecule Published as part of the Crystal Growth and Design Israel Goldberg Memorial virtual special issue

摘要

Of the available ligands for the study of molecular recognition by para-sulfonato-calix[n]arene receptors, phenanthroline is proving to a far more versatile moiety than it would have initially been expected. Interactions with two anionic host molecules, para-sulfonato-calix[4]arene and para-sulfonato-calix[8]arene, have been previously examined in depth and described. In this paper, further structural studies concerning supramolecular self-assembly species of unsubstituted calix [6] arene, para-sulfonato-calix[6]arene, para-sulfon ato-calix [4] arene, and 25,27-O-di(carboxymethoxy)-calix[4]arene with phenanthroline are reported. Structures of crystalline host-guest complexes were determined by means of X-ray diffraction. Diversity of the chemical makeup of the structures is observed: four structures are cocrystals and the other four are organic salts. In the packing motifs columnar systems are the commonest among those observed.