Complexation of L-arginine and L-lysine by p-sulphonatocalix (61 arene in aqueous solution at different temperatures

Subject Areas : Journal of Physical & Theoretical Chemistry

M. Faraji ¹ , K. Zare ² , A. Farajtabar ³ , F. Gharib ⁴

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Received: 2015-05-31 Accepted : 2015-05-31 Published : 2011-08-01

Keywords: p-sulphonatocalix [6] arene, Amino acid, Equilibrium constant, Thermodynamic&#x0D, &#x0D, parameters,

Abstract :

The interaction of p-sulphonatocalix [6] arene towards L-arginine and L-lysine has been studied inacidic aqueous solution (p1-1 2) using UV-Vis spectrophotometric titration technique. The psulphonatocalix[6] arene was found to be able to form 1:1 complexe with amino acids in water.The values of the association constant were determined at different temperatures to evaluate thethermodynamic functions of the complexation reaction. The thermodynamics values of complexeswere compared to each other.

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Complexation of L-arginine and L-lysine by p-sulphonatocalix (61 arene in aqueous solution at different temperatures