Abstract
A surface active ion-adduct, bis(octadecylammonium) tetrachloridocuprate(II) was synthesized and characterized by different spectroscopic techniques such as FTIR, NMR, UV-visible, powder X-ray diffractionanalysis. The determination of theoretical parameters and electrostatic potential mapping using molecular mechanics method indicated the nitrogen to be the protonation site of its precursor i.e octadecylammonium chloride. The physicochemical behaviour of the surface active adduct in aqueous medium was explored by surface tensiometry in conjunction with conductivity and UV-visible absorbance measurements. The surface tension of water at 40 °C decreased remarkably in presence of the ion-adduct till 0.4 mM beyond which the value remained constant. The threshold aggregate micelle concentration (CMC) at 0.4 mM with pC20 positioned much before the CMC was evident further from conductivity and UV-visible data. The determination of size and zeta potential of the aggregated ion-adduct by dynamic light scattering study envisaged the formation of a gigantic positively charged vesicle. The mechanism of aggregation and nature of organization were suggested by coupling with AFM studies
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