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Triskelion-shaped iridium-helicene NHC complex

Abstract : 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).
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https://hal.archives-ouvertes.fr/hal-03331038
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Tuesday, September 21, 2021 - 1:48:10 PM
Last modification on : Tuesday, September 21, 2021 - 2:10:36 PM

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Etienne S. Gauthier, Nora Hellou, Elsa Caytan, Samuel del Fré, Vincent Dorcet, et al.. Triskelion-shaped iridium-helicene NHC complex. Inorganic Chemistry Frontiers, Royal Society of Chemistry, 2021, 8 (16), pp.3916-3925. ⟨10.1039/d1qi00527h⟩. ⟨hal-03331038⟩

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