Fiche publication
Date publication
février 2022
Journal
Chemistry (Weinheim an der Bergstrasse, Germany)
Auteurs
Membres identifiés du Cancéropôle Est :
Dr CHAMBRON Jean-Claude
Tous les auteurs :
Zhang J, Schaly A, Chambron JC, Vincent B, Zorn N, Leize-Wagner E, Jean M, Vanthuyne N
Lien Pubmed
Résumé
Chiral gold(I) acetylide trinuclear complexes 1-3 based on the cyclotribenzylene platform and terminal PR ligands (R=Ph, Et, and Cy, respectively), were characterized and their light emission studied. They exhibited long-lived blue phosphorescence in CHCl and a weak fluorescence in the UV. In MeOH/CHCl mixtures of >1:1 volume ratio, 1 and 2 exhibited a new emission band at ca. 540 nm that developed at the expense of the UV emission. DLS studies demonstrated the presence of molecular aggregates of Ø 30-80 nm. The green emission observed in MeOH-rich solvent mixtures was therefore induced by aggregation, and could originate from Au⋅⋅⋅Au interactions. The AIE spectrum of 3 was observed only in solutions containing 99 % of MeOH, and correlated with its solid state emission. The AIE profiles of the enantiomers of 1 differed from that of rac-1, suggesting that the latter is a true racemate.
Mots clés
aggregation, alkyne ligands, chirality, gold, luminescence
Référence
Chemistry. 2022 02 1;28(7):e202103759
