Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Schiff-base [4]helicene Zn( ii ) complexes as chiral emitters

Abstract : The controlled preparation of chiral emissive transition metal complexes is fundamental in the field of circularly polarized luminescence (CPL) active molecular materials. For this purpose, enantiopure Zn(II) complexes 1 and 2 based on a tetradentate salen ligand surrounded by [4]helicene moieties, together with their racemic counterpart 3, have been herein synthesized. Chirality is primarily brought about by chiral 1,2-cyclohexane-diamines. Alternatively, achiral complex 4 based on ortho-phenylene-diamine has been prepared as well. Single crystal X-ray diffraction analyses have been performed on helicenic intermediates 8 and 9 and complexes 1 and 4. Complexes 1 and 4 display the typical tetradentate O,N,N,O coordination around Zn(II) characteristic of salen ligands, and bear two [4]helicene moieties. The zinc complexes are luminescent in the visible range around 560 nm at room temperature in aerated solutions with the QY reaching ca. 15% for a luminescence lifetime of 5.5 ns. The optical activities of these complexes have been assessed by CD and CPL, and compared to DFT calculations.
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées
Contributeur : Narcis Avarvari Connectez-vous pour contacter le contributeur
Soumis le : vendredi 26 novembre 2021 - 18:35:42
Dernière modification le : mercredi 28 septembre 2022 - 05:49:21
Archivage à long terme le : : dimanche 27 février 2022 - 20:16:53


Dalton Trans_Zigon_Avarvari_re...
Fichiers produits par l'(les) auteur(s)



Mariia Savchuk, Steven Vertueux, Thomas Cauchy, Matthieu Loumaigne, Francesco Zinna, et al.. Schiff-base [4]helicene Zn( ii ) complexes as chiral emitters. Dalton Transactions, Royal Society of Chemistry, 2021, 50 (30), pp.10533-10539. ⟨10.1039/d1dt01752g⟩. ⟨hal-03452260⟩



Consultations de la notice


Téléchargements de fichiers