Maniaki, DiamantoulaSickinger, AnnikaBarrios Moreno, Leoní AlejandraAguilà Avilés, DavidRoubeau, OlivierSettineri, Nicholas S.Guyot, YannickRiobé, FrançoisMaury, OlivierAbad Galán, LauraAromí Bedmar, Guillem2024-12-172024-12-172023-02-080020-1669https://hdl.handle.net/2445/217158Facile access to site-selective hetero-lanthanide molecules will open new avenues in the search of novel photophysical phenomena based on Ln-to-Ln′ energy transfer (ET). This challenge demands strategies to segregate efficiently different Ln metal ions among different positions in a molecule. We report here the one-step synthesis and structure of a pure [YbNdYb] (1) coordination complex featuring short Yb···Nd distances, ideal to investigate a potential distributive (i.e., from one donor to two acceptors) intramolecular ET from one Nd3+ ion to two Yb3+ centers within a well-characterized molecule. The difference in ionic radius is the mechanism allowing to allocate selectively both types of metal ion within the molecular structure, exploited with the simultaneous use of two β-diketone-type ligands. To assist the photophysical investigation of this heterometallic species, the analogues [YbLaYb] (2) and [LuNdLu] (3) have also been prepared. Sensitization of Yb3+ and Nd3+ in the last two complexes, respectively, was observed, with remarkably long decay times, facilitating the determination of the Nd-to-Yb ET within the [YbNdYb] composite. This ET was demonstrated by comparing the emission of iso-absorbant solutions of 1, 2, and 3 and through lifetime determinations in solution and solid state. The comparatively high efficiency of this process corroborates the facilitating effect of having two acceptors for the nonradiative decay of Nd3+ created within the [YbNdYb] molecule.10 p.application/pdfengcc-by (c) Maniaki, Diamantoula, et al., 2023http://creativecommons.org/licenses/by/3.0/es/Sistemes complexosMolèculesTransferència d'energiaComplex systemsMoleculesEnergy transferinfo:eu-repo/semantics/article7398582024-12-17info:eu-repo/semantics/openAccess