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Vol. 27 No. 11 (2015): Vol 27 Issue 11

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Study of Electronic Absorption Spectra of Thiophene Schiff Bases in Varied pH Buffer Solutions

https://doi.org/10.14233/ajchem.2015.19101
M. El-Batouti
Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
E.H. El-Mossalamy
Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
N.F. Al-Harbi
Chemistry Department, Faculty of Science and Arts, Qassim University, Buraydah 52571, Saudi Arabia

Corresponding Author(s) : M. El-Batouti

mervette_b@yahoo.com

Asian Journal of Chemistry, Vol. 27 No. 11 (2015): Vol 27 Issue 11

Abstract

The absorption spectrum was measured for Schiff bases of thiophene in buffer solution at 25 °C to study medium effect in acidic and basic solutions, to determine pKa values and to identify the sensitivity of these compounds for the ionization movement in the medium. This facilitates the studied process of these compounds and understanding of their behaviour when exposed to electron acceptors. The UV-visible spectra of the Schiff bases were studied in buffer solutions of different pH = (2-12) containing 30 % (v/v) ethanol to affect the solubility of the organic compounds. In the present paper the electronic absorption spectra of some Schiff base compounds derived from thiophene have studied in organic solvents of varying polarity and buffer solutions of different pH.

Keywords

Charge transfer complex pKa determination Solvent effects pH measurements
El-Batouti, M., El-Mossalamy, E., & Al-Harbi, N. (2015). Study of Electronic Absorption Spectra of Thiophene Schiff Bases in Varied pH Buffer Solutions. Asian Journal of Chemistry, 27(11), 4097–4102. https://doi.org/10.14233/ajchem.2015.19101
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