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Synthesis, structure, photophysical and chiroptical properties of dinuclear rhenium complexes with a bridging helicene‐bis‐bipyridine ligand.

Crassous, Jeanne and Saleh, Nidal and Kundu, Debsouri and Vanthuyne, Nicolas and Olesiak, Joanna and Pniakowska, Anna and Matczyszyn, Katarzyna and Chang, Victoria and Muller, Gilles and Williams, Gareth and Srebro-Hooper, Monika and Autschbach, Jochen (2020) 'Synthesis, structure, photophysical and chiroptical properties of dinuclear rhenium complexes with a bridging helicene‐bis‐bipyridine ligand.', ChemPlusChem., 85 (11). pp. 2446-2454.

Abstract

By attaching pyridine groups to a diaza[6]helicene, a helical, bis‐ditopic, bis‐N^N‐coordinating ligand can be accessed. Dinuclear rhenium complexes featuring this bridging ligand, of the form [{Re(CO)3Cl}2(N^N–N^N)], have been prepared and resolved to give enantiopure complexes. They are phosphorescent in solution at room temperature under one‐ and two‐photon excitation. Their experimental chiroptical properties (optical rotation, electronic circular dichroism and circularly polarized emission) have been measured. They show, for instance, emission dissymmetry factors of c.a. ±3.10‐3. Quantum‐chemical calculations indicate the importance of stereochemistry on the optical activity, pointing towards further design improvements in such types of complexes.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1002/cplu.202000559
Publisher statement:This is the peer reviewed version of the following article: Crassous, Jeanne, Saleh, Nidal, Kundu, Debsouri, Vanthuyne, Nicolas, Olesiak, Joanna, Pniakowska, Anna, Matczyszyn, Katarzyna, Chang, Victoria, Muller, Gilles, Williams, Gareth, Srebro-Hooper, Monika & Autschbach, Jochen (2020). Synthesis, structure, photophysical and chiroptical properties of dinuclear rhenium complexes with a bridging helicene‐bis‐bipyridine ligand. ChemPlusChem 85(11): 2446-2454 which has been published in final form at https://doi.org/10.1002/cplu.202000559. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Date accepted:02 September 2020
Date deposited:08 September 2020
Date of first online publication:23 September 2020
Date first made open access:24 September 2021

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