Excited state properties of Lanthanide(III) complexes with a nonadentate bispidine ligand
EuIII, TbIII, GdIII and YbIII complexes of the nonadentate bispidine derivative L2 (bispidine=3,7-diazabicyclo[3.3.1]nonane) were successfully synthesized and their emission properties studied. The X-ray crystallography reveals full encapsulation by the nonadentate ligand L2 that enforces to all LnI...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2021
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| In: |
Chemistry - a European journal
Year: 2021, Volume: 27, Issue: 40, Pages: 10303-10312 |
| ISSN: | 1521-3765 |
| DOI: | 10.1002/chem.202005459 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/chem.202005459 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.202005459 
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| Author Notes: | Laura Abad-Galán, Patrick Cieslik, Peter Comba, Michael Gast, Olivier Maury, Lucca Neupert, Amandine Roux, and Hubert Wadepohl |
| Summary: | EuIII, TbIII, GdIII and YbIII complexes of the nonadentate bispidine derivative L2 (bispidine=3,7-diazabicyclo[3.3.1]nonane) were successfully synthesized and their emission properties studied. The X-ray crystallography reveals full encapsulation by the nonadentate ligand L2 that enforces to all LnIII cations a common highly symmetrical capped square antiprismatic (CSAPR) coordination geometry (pseudo C4v symmetry). The well-resolved identical emission spectra in solid state and in solution confirm equal structures in both media. As therefore expected, this results in long-lived excited states and high emission quantum yields ([EuIIIL2]+, H2O, 298 K, τ=1.51 ms, ϕ=0.35; [TbIIIL2]+, H2O, 298 K, τ=1.95 ms, ϕ=0.68). Together with the very high kinetic and thermodynamic stabilities, these complexes are a possible basis for interesting biological probes. |
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| Item Description: | Gesehen am 14.04.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1521-3765 |
| DOI: | 10.1002/chem.202005459 |