Triskelion-shaped iridium-helicene NHC complex
Résumé
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 g(lum) factors around 10(-3).
Domaines
Chimie de coordination
Fichier principal
Gauthier et al_2021_Triskelion-shaped iridium-helicene_accepted.pdf (2.23 Mo)
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Gauthier et al_2021_Triskelion-shaped iridium-helicene_suppl data.pdf (6.45 Mo)
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