Upconversion in a d-f [RuYb] Supramolecular Assembly.
Fiche publication
Date publication
juin 2022
Journal
Journal of the American Chemical Society
Auteurs
Membres identifiés du Cancéropôle Est :
Dr CHARBONNIERE Loïc, Dr CIANFERANI Sarah, Pr MELY Yves
Tous les auteurs :
Knighton RC, Soro LK, Thor W, Strub JM, Cianférani S, Mély Y, Lenertz M, Wong KL, Platas-Iglesias C, Przybilla F, Charbonnière LJ
Lien Pubmed
Résumé
We have prepared a hetero-tetrametallic assembly consisting of three ytterbium ions coordinated to a central [Ru(bpm)] (bpm = 2,2'-bipyrimidine) motif. Irradiation into the absorption band of the peripheral ytterbium ions at 980 nm engenders emission of the MLCT state of the central [Ru(bpm)] core at 636 nm, which represents the first example of f → d molecular upconversion (UC). Time-resolved measurements reveal a slow rise of the UC emission, which was modeled with a mathematical treatment of the observed kinetics according to a cooperative photosensitization mechanism using a virtual Yb centered doubly excited state followed by energy transfer to the Ru centered MLCT state.
Référence
J Am Chem Soc. 2022 06 30;: