Preparation, characterization and spectroscopy of the europium diphenylphosphinate complex
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Data
1998-07-24
Autores
Stucchi, Elizabeth B.
Scarpari, Sérgio L.
Couto Dos Santos, Marcos A.
Leite, Sérgio R. A.
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Resumo
The purpose of this work is to study the preparation and spectroscopic behavior of the europium diphenylphosphinate complex -Eu(DPP)3. Elemental and thermogravimetric analysis, powder X-ray diffractometry, and infrared spectroscopy were applied to characterize the formula of the final product and the sixfold coordination of the Eu3+ ion. Excitation and emission spectra have been recorded at liquid nitrogen and room temperatures. The 5D0→7F2 transition intensity decreases when T decreases in comparison to the 5D0→7F1 transition intensity. Molecular mechanic calculations were developed in order to obtain the spatial coordinates of the Eu3+ and ligand ions. The simple overlap model was used to calculate the total splitting of the 5D0→7F1 transition, 5D0→7F0/5D 0→7F2 ntensity ratio and the intensity parameters, Ωλ (λ=2 and 4). Good agreements between theoretical predictions and experimental results have been obtained with g=2/3 as the effective charge and α=0.8×10-24 cm3 as the isotropic polarizability of the oxygen. © 1998 Elsevier Science S.A.
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Europium diphenylphosphinate complex, Intensity parameters, Luminescence, UV-Vis-IR spectroscopy, Computer simulation, Electron transitions, Infrared spectroscopy, Luminescence of solids, Mathematical models, Molecular dynamics, Molecular structure, Thermogravimetric analysis, Ultraviolet spectroscopy, X ray powder diffraction, Europium diphenylphosphinate, Europium compounds
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Journal of Alloys and Compounds, v. 275-277, p. 89-92.