Crassous, Jeanne and Gauthier, Etienne S. and Hellou, Nora and Caytan, Elsa and Fré, Samuel Del and Vanthuyne, Nicolas and Dorcet, Vincent and Williams, Gareth and Favereau, Ludovic and Srebro-Hooper, Monika (2021) 'Triskelion-shaped iridium-helicene NHC complex.', Inorganic chemistry frontiers., 8 (16). pp. 3916-3925.
Enantiopure tris-helicenic chiral-at-iridium complexes have been prepared, constituting the first examples of organometallic metal-tris-helicenes. They have the mer- or fac-Ir(C^C:)3 form, where (C^C:) is an N-heterocyclic carbene ligand N-substituted with a hexahelicene. Their triskelion geometry and stereochemistry have been thoroughly studied and assigned by NMR in combination with quantum-chemical modelling and by comparison with the X-ray structure of analogues. Thanks to their Ir(III)-based multihelicenic architecture, the complexes display strong electronic circular dichroism and optical rotation along with long-lived yellow phosphorescence, involving circularly polarized emission with glum factors around 10−3.
|Full text:||Publisher-imposed embargo until 09 July 2022. |
(AM) Accepted Manuscript
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|Publisher Web site:||https://doi.org/10.1039/D1QI00527H|
|Date accepted:||07 July 2021|
|Date deposited:||22 July 2021|
|Date of first online publication:||09 July 2021|
|Date first made open access:||09 July 2022|
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