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Inne
Thermodynamics of the hydration equilibrium derived from the luminescence spectra of the solid state for the case of the Eu-EDTA system.
Autorzy
Rok wydania
2015
Czasopismo
Physical Chemistry Chemical Physics
Numer woluminu
17
Strony
29558-29565
DOI
10.1039/c5cp02429c
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The luminescence properties of two compounds, [C(NH2)3][Eu(EDTA)(H2O)3] (I) and [C(NH2)3]2[Yb0.97Eu0.03(EDTA)(H2O)2]ClO4·6H2O (II), were determined. The weighted sum of luminescence spectra of I and II was used to reproduce the spectra of the Eu–EDTA system in aqueous solution in the temperature range 276–363 K. By implementing this method it was possible to determine the thermodynamic functions (ΔH = 18113 ± 506 J mole−1 and ΔS = 62.5 ± 4.9 J mole−1 K−1) of the reaction [Eu(EDTA)(H2O)3]− ⇆ [Eu(EDTA)(H2O)2]− + H2O, which is difficult using other methods.
Adres publiczny
http://dx.doi.org/10.1039/c5cp02429c
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