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Triskelion-shaped iridium-helicene NHC complex

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.

Item Type:Article
Full text:Publisher-imposed embargo until 09 July 2022.
(AM) Accepted Manuscript
File format - PDF
Publisher Web site:
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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