Artículos de revistas
Chalcones as analytical reagents of aluminum: Stability, thermodynamic and kinetic study
Fecha
2015-03Registro en:
Muñoz, Vanesa Alejandra; Kretek, Carolina G.; Montaña, Maria Paulina; Pappano, Nora Beatriz; Debattista, Nora Beatriz; et al.; Chalcones as analytical reagents of aluminum: Stability, thermodynamic and kinetic study; Oldenbourg Verlag; Zeitschrift für Physikalische Chemie; 229; 3; 3-2015; 417-426
0942-9352
2196-7156
CONICET Digital
CONICET
Autor
Muñoz, Vanesa Alejandra
Kretek, Carolina G.
Montaña, Maria Paulina
Pappano, Nora Beatriz
Debattista, Nora Beatriz
Ferrari, Gabriela Verónica
Resumen
Chalcones, a group of polyphenolic compounds, has been studied for a long time due to their biological properties and their ability as analytical reagents. In this work the stability and thermodynamic parameters concerning the fotmation in ethanolic medium of two chalcone-aluminium complexes (2′,3- dihydroxychalcone-Al(III) and 2′,4′,3-trihydroxychalcone-Al(III)) were studied and a kinetic study of the formation reaction was aslo performed. Both systems showed 1 : 1 L :M stoichiometry and stability constants at four temperatures were determined. Thermodynamic parameters indicate that both formation reactions are endothermic and driving force is entropic. Kinetic study revealed that 2′,4′,3-trihydroxychalcone-Al(III) formation is faster than 2′,3-dihydroxyclacone- Al(III), a factorwhich can be interestingwhen proposingnewanalytical reagents.