Influence of the Structure of 3-Arylacetylacetonate Ligands on the Luminescence Properties of Eu3+ and Tb3+ Complexes
| Autor: | A. V. Kandel, Elena A. Mikhalyova, Matthias Zeller, Vitaly V. Pavlishchuk, Anthony W. Addison |
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| Rok vydání: | 2017 |
| Předmět: |
Tris
Substituent chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Ion chemistry.chemical_compound chemistry Excited state Triplet state Elongation 0210 nano-technology Luminescence Boron |
| Zdroj: | Theoretical and Experimental Chemistry. 53:180-186 |
| ISSN: | 1573-935X 0040-5760 |
| Popis: | It was shown that in the series of complexes Tp2LnL (Ln = Eu, Tb; Tp– = tris(pyrazolyl)borate anion; L– = 3-arylacetylacetonate) the energy of the triplet state of L– decreases with elongation of the conjugation chain of the aromatic substituent, resulting in change of the nature of emission from metal-centered to ligand-centered. It was found, that the introduction of two antenna ligands of different nature leads to increase of the luminescence quantum yield (to 74%) in the case of the Tb3+ compounds, probably, due to optimization of energy transfer. In the Eu3+ compounds it leads to emission quenching, likely, as a result of increased efficiency of energy transfer and non-radiative deactivation of the excited states. |
| Databáze: | OpenAIRE |
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