Surface and Biological Activity of Some Prepared Quaternary Ammonium Surfactants

This work investigates the reaction of decyl, dodecyl, and tetradecyl amine with sulphouric acid to produce a quaternary ammonium salt, which consequently converted to copper and cobalt cationic complexes via complexing with copper(II) or cobalt(II) ions. The surface properties studied include critical micelle concentration (CMC), maximum surface excess (max), minimum surface area (Amin), free energies of micellization [image omitted] and adsorption [image omitted]. The interfacial activity (Iactiv.), which is expressed by physicochemical parameter [image omitted]/Amin, was calculated. Antimicrobial activity was determined via the inhibition zone diameter of the prepared compounds, which measured against five strains of group of microorganisms. Antitumor activity for some of these compounds was tested by using Ehrlich Acites Carcinoma (EAC) as a model system of mice cell tumor. Some of these compounds were also tested in vitro on human five monolayer tumor cell lines: MCF7 (breast carcinoma), HEPG2 (liver carcinoma), U251 (brain tumor), HCT116 (colon carcinoma), and H460 (lung carcinoma). Fourier transform infrared spectroscopy (FTIR) spectra, elemental analysis, and nuclear magnetic resonance (1H NMR) spectrum were performed to insure the purity of the prepared compounds.