Complexation thermodynamic of Water - soluble p - sulfonated Calix [ 4 ] arene with Tungsten ( VI ) in aqueous solution

Abstract

Spectrophotometric titrations have been performed in aqueous solution at different temperature(25 ± 0.1 to 65 ± 0.1 °C) to calculate the complex formation constants (K) and thermodynamic parameters (∆G, ∆H , and T∆S) for the stoichiometric 1:1 complexation of Tungsten(VI) with (25, 26, 27, 28, 29tetrahyroxy-5,11, 17, 23tetrasulfonic acid calix(4)arene).The… (More)

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