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Information × Registration Number 0218U000330, 0117U004548 , R & D reports Title The development of new high luminescent systems based on lanthanide complexes and hybrid nanocomposites for the needs of modern nanoelectronics popup.stage_title Head Pavlishchuk Vitaliy Valentinovich, Registration Date 25-01-2018 Organization Institute of Physical Chemistry L.V.Pisarzhevsky NAS Ukraine popup.description2 As a result of the project in 2017 more than 15 new compounds were obtained, namely a series of hetero-ligand mononuclear complexes of lanthanides Tp2LnL (Ln = Eu3+, Tb3+, Gd3+; Tp- = tris(pyrazolyl)borate, L- = 3-arylacetylacetonate anion) and binuclear complexes of the composition (Tp2Ln)2C2O4 (Ln = Eu3+, Tb3+, Gd3+, Tp- = tris(pyrazolyl)borate) and (TpPyLn)2pma (Ln = Eu3+, Tb3+, Gd3+, TpPy- = tris(2-pyridylpyrazolyl)borate , pma4- = tetranion of 1,2,4,5-benzene tetracarboxylic acid). It has been found that in the Eu3+ and Tb3+ complexes with 3-arylacetylacetonate ligands, the increase in the number of condensed rings in aromatic substituent of ligand leads to a decrease in the energy of its triplet level, which causes the change of the emission center and the change from metal to ligand-centered luminescence. It also causes a change in the emission color from red (Eu3+) or green (Tb3+) to blue-violet. It was established that the introduction of two antenna-ligands of various nature in Tb3+ - compounds (i.e. Tp- and acetylacetonate or Tp- and 3 phenylacetylacetonate) leads to higher Tb3+-emission quantum yield , and in the case of Eu3+ - compounds, the luminescence quenching was observed. This can be due to differences in the directions of the excitation energy transfer in these compounds. It was shown that binuclear Eu3+ and Tb3+ complexes tris(pyrazolyl)borate and carboxylate ligands exhibit intense metal-centered emission with quantum yields up to 22 and 53%, respectively. This indicates the high efficiency of the excitation energy transfer to the lanthanide ions in these compounds. Product Description popup.authors Василенко І.В. Міхальова О.А. Павліщук В.В. popup.nrat_date 2020-04-02 Close