Structure of copper and nickel amine complexes with polyoxometallates and their adsorption properties relative to lower alcohols

Abstract

The rates of the adsorption and desorption of methanol and ethanol vapor to and from compounds formed by cationic copper(II) and nickel(II) amine complexes and polyoxometallate anions can be described in the linear driving force transfer model as one or two parallel processes. It was proposed that the differences observed should be attributed to the different crystal structures of the adsorbents. The compound consisting of a nickel tetramine complex and [HSiW12O40]3− anion displays high selectivity toward ethanol relative to methanol.