Long‐lived circularly‐polarized phosphorescence in helicene‐NHC‐rhenium(I) complexes: the influence of helicene, halogen and stereochemistry on emission properties

Crassous, Jeanne; Gauthier, Etienne S.; Abella, Laura; Hellou, Nora; Darquié, Benoît; Caytan, Elsa; Roisnel, Thierry; Vanthuyne, Nicolas; Favereau, Ludovic; Srebro-Hooper, Monika; Williams, J.A. Gareth; Autschbach, Jochen

doi:10.1002/anie.202002387

Long‐lived circularly‐polarized phosphorescence in helicene‐NHC‐rhenium(I) complexes: the influence of helicene, halogen and stereochemistry on emission properties

Crassous, Jeanne; Gauthier, Etienne S.; Abella, Laura; Hellou, Nora; Darquié, Benoît; Caytan, Elsa; Roisnel, Thierry; Vanthuyne, Nicolas; Favereau, Ludovic; Srebro-Hooper, Monika; Williams, J.A. Gareth; Autschbach, Jochen

Authors

Jeanne Crassous

Etienne S. Gauthier

Laura Abella

Nora Hellou

Benoît Darquié

Elsa Caytan

Thierry Roisnel

Nicolas Vanthuyne

Ludovic Favereau

Monika Srebro-Hooper

Professor Gareth Williams j.a.g.williams@durham.ac.uk
Professor

Jochen Autschbach

Abstract

First enantiopure, chiral‐at‐rhenium complexes of the form fac ‐ReX(CO) 3 (:C^N) have been prepared, where:C^N is a helicene N‐heterocyclic carbene ligand and X = Cl or I. They have shown strong changes in the emission characteristics, notably strongly enhanced phosphorescence lifetimes (reaching 0.7 ms) and increased CPL activity, as compared to their parent chiral models lacking the helicene unit. Identity of the halogen along with its position within the dissymmetric stereochemical environment strongly affect the photophysics of the proposed complexes, particularly the phosphorescence quantum yield and lifetime. All these results give fresh insight into fine tuning of photophysical and chiroptical properties of Re‐NHC systems.

Citation

Crassous, J., Gauthier, E. S., Abella, L., Hellou, N., Darquié, B., Caytan, E., …Autschbach, J. (2020). Long‐lived circularly‐polarized phosphorescence in helicene‐NHC‐rhenium(I) complexes: the influence of helicene, halogen and stereochemistry on emission properties. Angewandte Chemie International Edition, 59(22), 8394-8400. https://doi.org/10.1002/anie.202002387

Journal Article Type	Article
Acceptance Date	Mar 8, 2020
Online Publication Date	Apr 7, 2020
Publication Date	May 25, 2020
Deposit Date	Mar 16, 2020
Publicly Available Date	Apr 7, 2021
Journal	Angewandte Chemie International Edition
Print ISSN	1433-7851
Electronic ISSN	1521-3773
Publisher	Wiley
Peer Reviewed	Peer Reviewed
Volume	59
Issue	22
Pages	8394-8400
DOI	https://doi.org/10.1002/anie.202002387

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Copyright Statement
This is the peer reviewed version of the following article: Crassous, Jeanne, Gauthier, Etienne S., Abella, Laura, Hellou, Nora, Darquié, Benoît, Caytan, Elsa, Roisnel, Thierry, Vanthuyne, Nicolas, Favereau, Ludovic, Srebro-Hooper, Monika, Williams, J. A. Gareth & Autschbach, Jochen (2020). Long‐lived circularly‐polarized phosphorescence in helicene‐NHC‐rhenium(I) complexes: the influence of helicene, halogen and stereochemistry on emission properties. Angewandte Chemie International Edition 59(22): 8394-8400 which has been published in final form at https://doi.org/10.1002/anie.202002387. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.