Intermolecular Charge Transfer Induced Sensitization of Yb3+ in β-Diketone Coordination Compounds with Excellent Luminescence Efficiency
Achieving high quantum yields for Yb<sup>3+</sup> ion emission in complexes with organic ligands is a challenging task, as most Yb<sup>3+</sup> complexes with such ligands typically exhibit efficiencies below 3.5%. Our research demonstrates that the introduction of heavy atom-containing ancillary ligands, such as TPPO or TPAO, along with the careful engineering of the main β-diketone ligand, can increase the luminescence efficiency up to 20-fold by the alteration of the energy migration pathway. It is demonstrated that the combination of two distinct organic ligands leads to the blockage of singlet-triplet intersystem crossing (ISC), alongside electronic energy transfer from β-diketone to Yb<sup>3+</sup> ions through charge transfer states. The synthesized complexes exhibit quantum yields of 6.5% and 7.0% in the solid state, which places them at the top globally among this class of materials with simple non-deuterated and non-fluorinated ligands.
Authors
- С. В. Чекалин (ORCID: https://orcid.org/0000-0002-3536-5849)
- Trofim Polikovskiy (ORCID: https://orcid.org/0009-0001-2158-0986)
- Meiirbek Islamov
- N. P. Datskevich (ORCID: https://orcid.org/0000-0002-3689-9877)
- Yu. А. Belousov (ORCID: https://orcid.org/0000-0002-4976-4437)
- Ilya V. Taydakov (ORCID: https://orcid.org/0000-0001-9860-4141)
- Vladislav M. Korshunov (ORCID: https://orcid.org/0000-0003-3261-1140)
- Victoria E. Gontcharenko (ORCID: https://orcid.org/0000-0001-6290-8880)
- V. O. Kompanets (ORCID: https://orcid.org/0000-0002-2500-9832)
- Mikhail T. Metlin (ORCID: https://orcid.org/0000-0003-3284-5019)
- Daniil D. Shikin (ORCID: https://orcid.org/0009-0009-7329-1279)
Institutions
- National Research University Higher School of Economics (RU)
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences (RU)
- Moscow Institute of Physics and Technology (RU)
- Bauman Moscow State Technical University (RU)
- Lomonosov Moscow State University (RU)
- Institute of Spectroscopy (RU)
Publication Details
- Journal
- International Journal of Molecular Sciences
- Published
- 2025-07-16
- DOI
- https://doi.org/10.3390/ijms26146814
- Citations
- 3
- Primary Topic
- Lanthanide and Transition Metal Complexes
- Type
- article
- Field-Weighted Citation Impact
- 1.55
Funders
- Lomonosov Moscow State University