Molecular Tectonics: Design Of Enantiopure Luminescent Heterometallic Ir(Iii)-Cd(Ii) Coordination Network

With the aim of combining luminescence and chirality in heterometallic Ir(III)-Cd(II) coordination networks, synthetic strategies for the formation of new Ir(III)-based chiral metallatectons ([Ir(dFppy)(2)(1)][PF6]), both as a racemic mixture of boolean AND and boolean AND enantiomers (rac-[Ir(dFppy)(2)(1)][PF6]) and as enantiopure complexes (boolean AND-[Ir(dFppy)(2)(1)][PF6] and boolean AND-[Ir(dFppy)(2)(1)][PF6]), were developed. The final compounds were characterized both in solution and in the crystalline phase. Notably, their crystal structures were determined by single crystal X-ray diffraction, and their photophysical properties in solution and in the solid state were investigated. Combination of the cationic linear metallatecton with Cd2+ iodide salt ([CdI3](-)), behaving as an anionic two-connecting node, leads to the formation of 1D chiral and neutral heterometallic Ir(III)-Cd(II) luminescent coordination networks both as a racemic mixture and as enantiomerically pure infinite architectures. The latter have been structurally studied in the solid state by X-ray diffraction both on single crystals and on microcrystalline powders. The infinite coordination networks display phosphorescence in the solid state at ca. 600 nm upon excitation at 400 nm