Buchumschlag

Ligand-sensitized lanthanide(III) luminescence with octadentate bispidines

The octadentate bispidine ligand L (bispidine=3,7-diazabicyclo[3,3,1]nonane) with two pyridine groups at C2 and C4 and two picolinates at N3 and N7, providing two tertiary amines, four pyridines and two carboxylates to metal ions, has been coordinated to lanthanide(III) ions (SmIII, EuIII, TbIII, Dy...

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Bibliographische Detailangaben
Hauptverfasser: Braun, Felix (VerfasserIn) , Comba, Peter (VerfasserIn) , Herten, Dirk-Peter (VerfasserIn) , Pokrandt, Bianca (VerfasserIn) , Wadepohl, Hubert (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2019
In: Inorganica chimica acta
Year: 2019, Jahrgang: 484, Pages: 464-468
ISSN:0020-1693
DOI:10.1016/j.ica.2018.09.078
Online-Zugang:Verlag, Volltext: https://doi.org/10.1016/j.ica.2018.09.078
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0020169318312593
Volltext
Verfasserangaben:Felix Braun, Peter Comba, Laura Grimm, Dirk-Peter Herten, Bianca Pokrandt, Hubert Wadepohl
Beschreibung
Zusammenfassung:The octadentate bispidine ligand L (bispidine=3,7-diazabicyclo[3,3,1]nonane) with two pyridine groups at C2 and C4 and two picolinates at N3 and N7, providing two tertiary amines, four pyridines and two carboxylates to metal ions, has been coordinated to lanthanide(III) ions (SmIII, EuIII, TbIII, DyIII, HoIII). The single crystal X-ray structures of [TbIII(L)(NO3)] and [HoIII(L)(OH2)](TFA) (TFA=trifluoracetate) have been determined and define the complexes as 9-coordinate with a monodentate nitrate or a water molecule completing the coordination sphere. Spectroscopy indicates that in solution all complexes are 9-coordinate with an OH2 coordinated to the lanthanide(III) center. Absorption and emission spectra show that the ligands function as antennas with UV excitation (260nm) leading to relatively high intensity emission in the visible region (500-600nm) with millisecond lifetimes of the excited states.
Beschreibung:Available online 29 September 2018
Gesehen am 01.08.2019
Beschreibung:Online Resource
ISSN:0020-1693
DOI:10.1016/j.ica.2018.09.078

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