Enantioenriched Ruthenium-Tris-Bipyridine Complexes Bearing One Helical Bipyridine Ligand: Access to Fused Multihelicenic Systems\nand Chiroptical Redox Switches.

0544194 - ÚCHP 2022 RIV US eng J - Článek v odborném periodiku
Kos, Martin - Rodriques, R. - Storch, Jan - Sýkora, Jan - Caytan, E. - Cordier, M. - Císařová, I. - Vanthuyne, N. - Williams, J.A.G. - Žádný, Jaroslav - Církva, Vladimír - Crassous, J.
Enantioenriched Ruthenium-Tris-Bipyridine Complexes Bearing One Helical Bipyridine Ligand: Access to Fused Multihelicenic Systems
and Chiroptical Redox Switches.
Inorganic Chemistry. Roč. 60, č. 16 (2021), s. 11838-11851. ISSN 0020-1669. E-ISSN 1520-510X
Grant CEP: GA ČR(CZ) GA20-19353S; GA MŠMT(CZ) EF18_053/0016920
Institucionální podpora: RVO:67985858
Klíčová slova: ligands * scaffolds * X ray crystallography
Obor OECD: Organic chemistry
Impakt faktor: 5.436, rok: 2021
Způsob publikování: Open access s časovým embargem

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.
Trvalý link: http://hdl.handle.net/11104/0321679