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Influence of ethyl alcohol in the preparation, morphology and properties of compound DAS–Eu3+ and its thermal degradation products

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Abstract

In this study, two compounds presenting characteristics different from each other were produced from there action between hydrated Eu3+ sulfate and Ba2+ diphenylamine-4-sulfonate using, respectively, aqueous solution for producing the Eu(C12H10NSO3)3·7H2O (A) compound and water/ethyl alcohol (7:1) solution for the Eu(C12H10NSO3)3·5H2O (B) production. The presence of alcohol molecules in the solution will interfere in the structural arrangement of anionic surfactant DAS− (diphenylamine-4-sulfonate) around the metal ions Eu3+ allowing differentiation in the stoichiometric formulas, morphology, and thermal properties of these compounds and their derivatives. Thus, when treating both compounds under oxidizing atmosphere, we found different temperatures of the water loss and conversion of the intermediate pair oxydisulfate [Eu2O(SO4)2]/dioxysulfate [(Eu2O2SO4)]. However, the effect of water/surfactant/alcohol interactions in the metal ion structural arrangement becomes still more evident under reducing atmosphere. After this thermal treatment, significant changes were observed in the morphological characteristics and physical properties of the (Eu2O2S oxysulfide) in compound B with respect to compound A.

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Authors and Affiliations

  1. Department of Chemistry, UFES, Vitória, ES, Brazil

    Luiz C. Machado, Maria A. de Carvalho, Antonio A. L. Marins & Rodrigo V. Rodrigues

  2. Chemistry Institute, USP, São Carlos, SP, Brazil

    Jivaldo R. Matos

  3. Department of Physics, UFES, Vitória, ES, Brazil

    Marcos T. D’Azeredo Orlando

Authors
  1. Luiz C. Machado
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  2. Maria A. de Carvalho
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  3. Antonio A. L. Marins
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  4. Rodrigo V. Rodrigues
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  5. Jivaldo R. Matos
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  6. Marcos T. D’Azeredo Orlando
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Correspondence to Luiz C. Machado.

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Machado, L.C., de Carvalho, M.A., Marins, A.A.L. et al. Influence of ethyl alcohol in the preparation, morphology and properties of compound DAS–Eu3+ and its thermal degradation products. J Therm Anal Calorim 114, 537–547 (2013). https://doi.org/10.1007/s10973-013-2958-x

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