Ion Transfer Across the Interface between Two Immiscible Electrolyte Solutions (ITIES) Formed by the Biphasic System Water-Propanol-Sucrose-PEG

Abstract

Ionic transfer between two immiscible electrolyte solutions has risen in interest in the past years for their various applications. ITIES are generally established between an organic and an aqueous electrolyte; however in this paper, the capability of ionic transfer experiments at the interface of an aqueous biphasic system is addressed. The results are reported on the water-sucrose-propanol-polyethylene glycol (PEG) biphasic system. Lithium Chloride, LiCl, and bis-(triphenylphoshporanylidene)ammonium chloride, BTPPYNCl, were chosen as supporting salts. A potential window of 1000 mV was observed. Ion transfer experiments were carried out after incremental additions of ammonium chloride. Cyclic voltammetries were performed at scan rates between 1 and 20 mV/s. Current peak increments related to ionic transfer were observed. Current peak showed linear correlation with concentration with correlation coefficients between 0.97 and 0.99.