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Enantiopure Cycloiridiated Complexes Bearing a Pentahelicenic N‐Heterocyclic Carbene and Displaying Long‐Lived Circularly Polarized Phosphorescence
Author(s) -
Hellou Nora,
SrebroHooper Monika,
Favereau Ludovic,
Zinna Francesco,
Caytan Elsa,
Toupet Loïc,
Dorcet Vincent,
Jean Marion,
Vanthuyne Nicolas,
Williams J. A. Gareth,
Di Bari Lorenzo,
Autschbach Jochen,
Crassous Jeanne
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704263
Subject(s) - carbene , enantiopure drug , phosphorescence , iridium , helicene , chemistry , circular polarization , stereochemistry , ligand (biochemistry) , polarization (electrochemistry) , crystallography , photochemistry , physics , catalysis , enantioselective synthesis , optics , fluorescence , molecule , organic chemistry , receptor , biochemistry , microstrip
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.