Characteristic study of some electronic spectroscopic parameters for the complex product of iron(iii)‎ and acetylsalicylic acid ligand

Abstract EN

In this study, UV-visible spectroscopic investigations have been carried out to determine some physicochemical parameters of the complexation reaction between iron (III) as an electron acceptor and acetylsalycilic acid ligand (ACSA) as an electron donor in water at 25°C.

The absorption band wavelengths of the electron donor, the electron acceptor and their complex were measured and studied.

The values of the parameters such as the molar extinction coefficient, ε, of the complex and the association constant, K, of their formation reaction obtained from the Benesi-Hildebrand, Scott, Foster-Hammick-Wardley equations were evaluated and discussed.

The absorption band energy of the charge transfer complex, ECT, and the Gibbs energy change of the above reaction, ΔG°, were calculated.

The results reveal that the complex was stable and the complexation reaction was sensitive and spontaneous.

Furthermore, the charge transfer complex was established as 1 : 1 stoichiometry.