Thermodynamic Effect of Bulk and Nano-CuCl2 Salts on Tenoxicam Using a Variety of Different Techniques

Esam A. Gomaa (), Elsayed M. Abou El-Leef (), Kamal S. Shalaby () and Shereen E. Salem ()

Journal of Environments, 2014, vol. 1, issue 2, 44-53

Abstract: Nanoparticles are very important for medicine and environment, because of their increased behaviours. The increasing in the physical and chemical properties of nanomaterials are due to theirs high surface area and small volume, makes them very reactive , catalytic and able to pass through cell membranes. Characterization of nano-CuCl2 is done by using a variety of different techniques, transmission electron microscopy (TEM), infra red spectroscopy (IR) and determination of its thermodynamic parameters using condutometric measurements. The association parameters of both bulk and nano-CuCl2 salts in DMF were easily calculated using using Fuoss-Shedlovsky method from temperatures, 298.15K (degree Kelvin) to 313.15K. In order to have a better understanding of thermodynamics of the complexation reactions between (bulk, nano-CuCl2) salts and tenoxicam in DMF, it is useful to determine the contribution of enthalpy and entropy of the reactions. The thermodynamic parameters were calculated from the temperatures dependence of the complexation constants ( Van't Hoff plot). The formation constants were measured as a function of temperature and increased by increasing temperature. Also, different volumes of tenoxicam in mixed (DMF+H2O) were determined from density measurement.

Keywords: CuCl2; Tenoxicam; Transmission electron microscopy (TEM); Fuoss –Shedlovsky method; Association and formation constants; Thermodynamic parameters. (search for similar items in EconPapers)
Date: 2014
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