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

Crassous, Jeanne and Gauthier, Etienne S. and Abella, Laura and Hellou, Nora and Darquié, Benoît and Caytan, Elsa and Roisnel, Thierry and Vanthuyne, Nicolas and Favereau, Ludovic and Srebro-Hooper, Monika and Williams, J. A. Gareth and 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). pp. 8394-8400.

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.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1002/anie.202002387
Publisher 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.
Date accepted:08 March 2020
Date deposited:17 March 2020
Date of first online publication:07 April 2020
Date first made open access:07 April 2021

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