Kos, Martin and Rodríguez, Rafael and Storch, Jan and Sýkora, Jan and Caytan, Elsa and Cordier, Marie and Císařová, Ivana and Vanthuyne, Nicolas and Williams, J. A. Gareth and Žádný, Jaroslav and Církva, Vladimír and Crassous, Jeanne (2021) 'Enantioenriched Ruthenium-Tris-Bipyridine Complexes Bearing One Helical Bipyridine Ligand: Access to Fused Multihelicenic Systems and Chiroptical Redox Switches.', Inorganic chemistry. .
The synthesis and photophysical and chiroptical properties of novel aza[n]helicenes (6a–d, 10a,b, n = 4–7) substituted with one or two 2-pyridyl groups are described. The preparation was performed via an adapted Mallory reaction using aromatic imines as precursors. The obtained novel class of helical 2,2′-bipyridine ligands was then coordinated to Ru(bipy)22+ units, thus affording the first diastereomerically and enantiomerically pure [RuL(bipy)2]2+ (11a,c, L = 6a,c) or [Ru2L′(bipy)4]4+ (12, L′ = 10b) complexes. The topology and stereochemistry of these novel metal-based helical architectures were studied in detail, notably using X-ray crystallography. Interestingly, the coordination to ruthenium(II) enabled the preparation of fused multihelical systems incorporating aza- and ruthena-helicenes within the same scaffold. The photophysical, chiroptical, and redox properties of these complexes were examined in detail, and efficient redox-triggered chiroptical switching activity was evidenced.
|Full text:||Publisher-imposed embargo until 23 July 2022. |
(AM) Accepted Manuscript
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|Publisher Web site:||https://doi.org/10.1021/acs.inorgchem.1c01379|
|Publisher statement:||This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.inorgchem.1c01379|
|Date accepted:||29 June 2021|
|Date deposited:||26 July 2021|
|Date of first online publication:||23 July 2021|
|Date first made open access:||23 July 2022|
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