Choline chloride-acetic acid mixture as a medium for the investigation of the electrochemical processes

Abstract

Physicochemical properties of a liquid mixture containing choline chloride (ChCl) and acetic acid (AA) with a molar ratio of 1:2 were analyzed to determine its suitability for electrochemical studies. Viscosity, ionic conductivity, and density values as well as the width of the electrochemical window of the ChCl:AA mixture show that this liquid can be used as a supporting electrolyte in electrochemical studies. This was confirmed by the results of electrochemical studies on a model red-ox system of o-tolidine. Additional electrochemical tests revealed the dissolution of solid Pt in ChCl:FA. The ChCl:AA solution was also used as a background electrolyte in preliminary studies on the electrochemical reduction of pertechnetates. Cyclic voltammetry and UV-Vis spectroscopy experiments reveal a multi-path process which leads to the formation of Tc(IV or III) ionic species.

Synthesis of Technetium Carboxylates: Wheel-Like Octanuclear Clusters (Tc8(μ-O)8(RCOO)16, Where R = CF3, C6H5)─Potential Nanobuilding Units for Tc-MOFs

“…Carboxylates of Mn­(II), Mn­(III), and Mn­(IV) have been previously reported. − Based on manganese carboxylates, framework-type structures were obtained . Previously, carboxylate systems of Tc­(VII) compounds were considered as electrolytes for metallic technetium coatings. − The literature states that the electroreduction mechanism of pertechnetate anions results in the creation of Tc­(IV) compounds. ,, However, isolating individual compounds and determining their structure were not studied. Polymer-chain cluster complexes of Tc 2 (OOCCH 3 ) 5 were previously reported as obtained from Tc­(VII) compounds .…”