Cooperative Luminescence and Cooperative Sensitisation Upconversion of Lanthanide Complexes in Solution.
Fiche publication
Date publication
novembre 2021
Journal
Angewandte Chemie (International ed. in English)
Auteurs
Membres identifiés du Cancéropôle Est :
Dr CHARBONNIERE Loïc
Tous les auteurs :
Charbonnière LJ, Knighton RC, Soro LK, Francés-Soriano L, Rodríguez-Rodríguez A, Pilet G, Lenertz M, Platas-Iglesias C, Hildebrandt N
Lien Pubmed
Résumé
Upconversion nanoparticles have led to various breakthrough applications in solar energy conversion, imaging, and biomedicine. One key impediment is the facilitation of such processes at the molecular scale in solution where quenching effects are much more pronounced. In this work, molecular solution-state cooperative luminescence (CL) upconversion arising from a Yb excited state is explored and the mechanistic origin behind cooperative sensitisation (CS) upconversion in Yb/ Tb systems is investigated. Counterintuitively, the best UC performances were obtained for Yb/Tb ratios close to parity, resulting in the brightest molecular upconversion complexes with a quantum yield of 2.8 × 10-6 at a low laser power density of 2.86 W/cm2.
Mots clés
cooperative luminescence, cooperative sensitisation, lanthanide clusters, upconversion
Référence
Angew Chem Int Ed Engl. 2021 Nov 8;: