| Institution: | 1. Inorganic Chemistry Department, Taras Shevchenko National University of Kyiv, 12, Lva Tolstogo St., 01601 Kyiv, Ukraine;2. STC “Institute for Single Crystals”, National Academy of Science of Ukraine, Nauky ave. 60, 61001 Kharkiv, Ukraine;3. STC “Institute for Single Crystals”, National Academy of Science of Ukraine, Nauky ave. 60, 61001 Kharkiv, Ukraine
V.N. Karazin Kharkiv National University, 4 Svobody sq., Kharkiv, 61122 Ukraine;4. Department of chemistry of lanthanides, A. V. Bogatsky Physico-chemical Institute of the National Academy of Sciences of Ukraine, 86 Lustdorfska doroga, 65080 Odesa, Ukraine;5. Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Str., 50-383 Wroclaw, Poland;6. Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal;7. Departamento de Qu?mica Fundamental, Universidade Federal de Pernambuco, Cidade Universitaria, 50740-560 Recife, Brazil |
| Abstract: | New lanthanide dimethyl-N-benzoylamidophosphate (HL) based tetrakis-complexes NEt4LnL4] (Ln3+=La, Nd, Sm, Eu, Gd, Tb, Dy) are reported. The complexes are characterized by means of NMR, IR, absorption, and luminescent spectroscopy as well as by elemental, X-Ray, and thermal gravimetric analyses. The phenyl groups of the four ligands of the complex anion are directed towards one side, while the methoxy groups are directed in the opposite side, which makes the complexes under consideration structurally similar to calixarenes. The effect of changing the alkali metal counterion to the organic cation NEt4+ on the structure and properties of the tetrakis-complex LnL4]- is analyzed. The complexes exhibit bright characteristic for respective lanthanides luminescence. Rather high intensity of the band of 5D0→7F4 transition, observed in the luminescence spectrum of NEt4EuL4], is discussed based on theoretical calculations. |
