Molecular Tectonics: Design of Enantiopure Luminescent Heterometallic Ir(III)–Cd(II) Coordination Network

• Published in: Inorganic chemistry Vol. 54; no. 21; pp. 10429 - 10439
• Main Authors: Xu, Chaojie, Guenet, Aurélie, Kyritsakas, Nathalie, Planeix, Jean-Marc, Hosseini, Mir Wais
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 02.11.2015
• Subjects: Cadmium - chemistry; Crystallography, X-Ray; Iridium - chemistry; Luminescence; Stereoisomerism
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.5b01910

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 Δ and Λ enantiomers (rac-[Ir­(dFppy)2(1)]­[PF6]) and as enantiopure complexes (Δ-[Ir­(dFppy)2(1)]­[PF6] and Λ-[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.