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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/65479
Título: 
Preparation, characterization and spectroscopy of the europium diphenylphosphinate complex
Autor(es): 
Instituição: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0925-8388
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.
Data de publicação: 
24-Jul-1998
Citação: 
Journal of Alloys and Compounds, v. 275-277, p. 89-92.
Duração: 
89-92
Palavras-chaves: 
  • 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
Fonte: 
http://dx.doi.org/10.1016/S0925-8388(98)00280-1
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/65479
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