Recent achievements from the CenTRA community are showcased below.
If you would like your research to be featured, please send an email to centra@felements.fr
Is lanthanide(III) ion luminescence photomodulation general ?
Tuan-Anh Phan, Frédéric Gendron, Salauat Kiraev, Olivier Galangau, Yoann Fréroux, Hassan Al Sabea, Cédric Mittelheisser, Marie Dallon, Aude Bouchet, François Riobé, Remi Métivier, Michel Sliwa, Boris Le Guennic, Olivier Maury, Akos Banyasz, Bogdan Marekha, Lucie Norel, and Stéphane Rigaut
In this contribution, researchers from ISCR – Université de Rennes and ENS Lyon have demonstrated that dithienylethene photoswitches can lead to efficient and reversible emission quenching process under UV light for visible emitters like Samarium(III), in addition to Europium(III), as well as NIR emitters such as Erbium(III), Ytterbium(III) or Neodymium(III). The underlying photophysical mechanisms are demonstrated by transient absorption experiments, photokinetic studies and theoretical calculations involving collaborators from LASIRE, PPSM and ISCR.
“Erbium(III) to Samarium(III): Generalized Photomodulation of NIR to Red Lanthanide Luminescence with a DTE Ligand and its Versatile Role in the Quenching Processes”, Chemical Science, 2025, 16, 22504-22516.
Read article:
https://doi.org/10.1039/D5SC07174G
Excitation energy funnelling in NIR-emissive [YbPrYb] heterometallic complexes
Salauat Kiraev, Diamantoula Maniaki, Annika Sickinger, Leoní A. Barrios, David Aguilà, Olivier Roubeau, Yannick Guyot, Olivier Maury, Laura Abad Galán and Guillem Aromí
Three researchs groups from LCH (ENS de Lyon), LabMolDesign (University of Barcelona) and Departamento de Química Inorgánica (University Complutense of Madrid) are studying various energy transfer among different lanthanide ions. This process has been demonstrated in various solid-state materials but is far less common to observe these phenomena in molecular structures. By comparison between the photophysical behavior of trimetallic [YbPrYb], [YbLaYb] and [LuPrLu] complexes, we evidenced the first bidirectional Pr3+ ⇄ Yb3+ energy transfer within a molecular complex and highlight the power of ligand architecture in enabling and modulating lanthanide photophysical behaviour.
Inorganic Chemistry Frontiers, 2025, 12, 8776-8784.
Read article:
https://doi.org/10.1039/D5QI01585E
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