Luminescent properties of Eu3+/Tb3+ doped fluorine containing coordination polymers
| Autor: | Thoralf Krahl, Gudrun Scholz, Carsten Prinz, Erhard Kemnitz, Steffen Zänker, Franziska Emmerling |
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| Rok vydání: | 2021 |
| Předmět: |
Lanthanide
Materials science Doping chemistry.chemical_element Barium 02 engineering and technology General Chemistry Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry Excited state Fluorine Physical chemistry General Materials Science 0210 nano-technology Luminescence Excitation |
| Zdroj: | Solid State Sciences. 117:106614 |
| ISSN: | 1293-2558 |
| DOI: | 10.1016/j.solidstatesciences.2021.106614 |
| Popis: | Lanthanides doped coordination polymers (CPs) with different binding motifs were synthesized to investigate the influence of the different fluorine positions in the structure on the decay time τ of the excited states. Fluorine can be integrated into the network mechanochemically via a fluorinated organic linker, here barium tetrafluoroterephthalate Ba(p-BDC-F4)2 or directly via a metal-fluorine bond (barium terephthalate fluoride BaF(p-BDC)0.5). The CP with a metal-fluorine bond shows the highest lifetime of the excited states of lanthanides (Eu3+, Tb3+ or Eu3+& Tb3+). The excitation of the lanthanides can be performed directly via the excitation wavelength typical for lanthanides and via the excitation wavelength of the linker. This enabled the simultaneous excitation of Eu3+ and Tb3+ in one CP. In the emission spectra (λem = 393 nm) of the mixed doped CPs (Eu3+ and Tb3+) the bands of both lanthanides can be observed. The integration into the crystal lattice and the homogeneous distribution of the lanthanides in the CPs is shown by X-ray diffraction, TEM, STEM-EDS measurements and the long decay times. |
| Databáze: | OpenAIRE |
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