title: Homochiral Self-Sorted and Emissive IrIIIMetallo-Cryptophanes.
abstract: The racemic ligands (±)-tris(isonicotinoyl)-cyclotriguaiacylene (L1), or (±)-tris(4-pyridyl-methyl)-cyclotriguaiacylene (L2) assemble with racemic (Λ,Δ)-[Ir(ppy)2(MeCN)2]+, in which ppy=2-phenylpyridinato, to form [{Ir(ppy)2}3(L)2]3+metallo-cryptophane cages. The crystal structure of [{Ir(ppy)2}3(L1)2]⋅3BF4has MM-ΛΛΛ and PP-ΔΔΔ isomers, and homochiral self-sorting occurs in solution, a process accelerated by a chiral guest. Self-recognition between L1 and L2 within cages does not occur, and cages show very slow ligand exchange. Both cages are phosphorescent, with [{Ir(ppy)2}3(L2)2]3+having enhanced and blue-shifted emission when compared with [{Ir(ppy)2}3(L1)2]3+.
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
authors.forename: Victoria E
authors.identifier: http://orcid.org/0000-0001-5270-4534
authors.initials: VE
authors.lastname: Pritchard
authors.affiliation: Organic Semiconductor Centre, EaSTCHEM School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
authors.forename: Diego
authors.initials: D
authors.lastname: Rota Martir
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
authors.forename: Samuel
authors.identifier: http://orcid.org/0000-0002-7506-0062
authors.initials: S
authors.lastname: Oldknow
authors.affiliation: Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan.
authors.forename: Shumpei
authors.initials: S
authors.lastname: Kai
authors.affiliation: Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan.
authors.forename: Shuichi
authors.identifier: http://orcid.org/0000-0002-9262-4747
authors.initials: S
authors.lastname: Hiraoka
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
authors.forename: Nikki J
authors.identifier: http://orcid.org/0000-0002-6048-4604
authors.initials: NJ
authors.lastname: Cookson
authors.affiliation: Organic Semiconductor Centre, EaSTCHEM School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK.
authors.forename: Eli
authors.identifier: http://orcid.org/0000-0001-7183-6022
authors.initials: E
authors.lastname: Zysman-Colman
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
authors.forename: Michaele J
authors.identifier: http://orcid.org/0000-0001-6586-7981
authors.initials: MJ
authors.lastname: Hardie
keywords: cage compounds; homochiral self-sorting; iridium; phosphorescence; supramolecular chemistry