A fused π-helical N-heterocyclic carbene (NHC) system was prepared and examined through its diastereoisomerically pure cycloiridiated complexes. The latter display light-green phosphorescence with unusually long lifetimes and circular polarization that depends on both the helical NHC P/M stereochemistry and the iridium Δ/Λ stereochemistry. These unprecedented features are attributed to extended π conjugation within the helical carbenic ligand and efficient helicene-NHC–Ir interaction.

Enantiopure Cycloiridiated Complexes Bearing a Pentahelicenic N-Heterocyclic Carbene and Displaying Long-Lived Circularly Polarized Phosphorescence

Zinna, Francesco;Di Bari, Lorenzo;
2017-01-01

Abstract

A fused π-helical N-heterocyclic carbene (NHC) system was prepared and examined through its diastereoisomerically pure cycloiridiated complexes. The latter display light-green phosphorescence with unusually long lifetimes and circular polarization that depends on both the helical NHC P/M stereochemistry and the iridium Δ/Λ stereochemistry. These unprecedented features are attributed to extended π conjugation within the helical carbenic ligand and efficient helicene-NHC–Ir interaction.
2017
Hellou, Nora; Srebro-Hooper, Monika; Favereau, Ludovic; Zinna, Francesco; Caytan, Elsa; Toupet, Loã¯c; Dorcet, Vincent; Jean, Marion; Vanthuyne, Nicolas; Williams, J. A. Gareth; Di Bari, Lorenzo; Autschbach, Jochen; Costante ep Crassous, Jeanne
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/909426
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