A Chiral Bis‐Naphthylated Tetrandrine Dibromide: Synthesis, Self‐Assembly into an Organic Framework Based On Nanosized Spherical Cages, and Inclusion Studies

Crystalline framework materials have gained interest because of their many potential applications. A novel chiral tetrandrine salt (DNT) has been synthesized and characterized by conventional analytical techniques and single‐crystal X‐ray diffraction analysis, and its self‐assembly behavior studied. In the solid state, 48 molecules of the compound self‐assemble into an organic framework based on nanospherical aggregates formed exclusively through weak noncovalent interactions. Additionally, it was demonstrated by UV‐vis spectroscopy and TGA that assembled DNT can include the Nile Red dye, giving a fluorescent material. To the best of our knowledge, these spherical assemblies are the largest among the purely synthetic organic self‐assembled molecular crystals reported to date. All inclusive: A chiral bis‐naphthylated tetrandrine dibromide self‐assembles into a framework based on nanospherical aggregates capable of including medium‐sized molecules. These assemblies are the largest among the purely synthetic organic self‐assembled supramolecular crystals reported to date.