Abstract
4-(4′-acetyloxy-3′-methoxybenzylidene)-5-oxazolone fluorescent molecules bearing four different aryl groups attached to the 2-position of 5-oxazolone ring have been investigated by spectrophotometric and potentiometric techniques in solution media. The acidity constants (pKa) of the fluorescent molecules were precisely determined in acetone, acetonitrile, dimethylformamide and in 1:1 mixture of toluene-isopropanol. The studied derivatives were titrated with tetrabutylammonium hydroxide and non-aqueous perchloric acid by scanning the basic and acidic region of the pH scale. A computerizable derivative method was used in order to descript precisely the end point and pKa values. The molecules investigated performed well-shaped and stoichiometric potentiometric titration curves.
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Taskiran, D.T., Urut, G.O., Ayata, S. et al. Spectrofluorimetric and Potentiometric Determination of Acidity Constants of 4-(4′-Acetyloxy-3′-Methoxybenzylidene)-5-Oxazolone Derivatives. J Fluoresc 27, 521–528 (2017). https://doi.org/10.1007/s10895-016-1979-9
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DOI: https://doi.org/10.1007/s10895-016-1979-9