L-Histidine-europium(III) complex: A spectroscopical study
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Data
1999-12-01
Autores
De Andrade Leite, Sergio R. [UNESP]
Couto Dos Santos, Marco A. [UNESP]
Carubelli, Célia R.
Galindo Massabni, Ana M. [UNESP]
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Resumo
Chemical characterization as well as spectroscopical study of the L-histidine-europium(III) complex were developed both experimental and theoretically. Molecular mechanics (MM) simulation was performed in order to have indication of the compound structure and the Eu 3+ chemical environment. The Simple Overlap Model (SOM) was applied to predict spectroscopic quantities as 5D 0→ 7F 0/ 5D 0→ 7F 2 intensity ratio, 5D 0→ 7F 1 transition splitting and the intensity Ω λ parameters (λ = 2 and 4). Satisfactory results are obtained with 0.1 and 2/3 as the effective charges of the nitrogen (gN) and oxygen (gO) respectively, and their polarizabilities (α) depend on the distance. © 1999 Elsevier Science B.V. All rights reserved.
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Palavras-chave
Europium, Histidine, Luminescence, Molecular mechanics, Simple overlap model, Spectroscopy
Como citar
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, v. 55, n. 6, p. 1185-1191, 1999.