The combination of transition metal ions and multitopic organic bridging ligands has led to the preparation of numerous supramolecular architectures. These assemblies generally possess rigid scaffolds and large internal cavities that promote intercalation of guest species and have found applications in host-guest chemistry, gas separation and catalysis. Surprisingly, despite the great interest in developing photophysically active functional 3D nanomaterials, only a handful of examples of phosphorescent supramolecular architectures have been developed to date.1-3 Herein, we report the self-assembly between enantiopure Λ-, Δ-[Ir(C^N)2(qpy)]PF6 metallo-ligands (where C^N is a cyclometalating ligand and qpy is 4,4':2',2'':4'',4'''-quaterpyridine) with square planar Pd2+ ions, leading to the formation of rare examples of homochiral and emissive supramolecular cages of the composition of Λ-, Δ-[Ir8Pd4]16+. The cages provide an adequate interior pocket to host large anionic guest molecules including mononuclear iridium(III) complexes, where energy transfer is observed between donor guest and acceptor cage.

Homochiral emissive [Ir8Pd4]16+ coordination cages

254th National Meeting (2017)

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