A fused Ï-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 Î/Î stereochemistry. These unprecedented features are attributed to extended Ï conjugation within the helical carbenic ligand and efficient helicene-NHCâIr 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 Ï-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 Î/Î stereochemistry. These unprecedented features are attributed to extended Ï conjugation within the helical carbenic ligand and efficient helicene-NHCâIr interaction.File in questo prodotto:
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