Zur Anionenselektivität von Distannylderivaten in Membranen

Abstract

Anion‐Selectivity of Distannyl Derivatives in Membranes A series of distannyl derivatives (2,2‐bis(trimethylstannyl)‐1,3‐dithiane, 2,2‐bis(tributylstannyl)‐1,3‐dithiane, hexamethyldistannane, hexabutyldistannane, hexaphenyldistannane, bis(triphenylstannyl)sulfide, o ‐bis(trimethylstannyl)benzene) has been studied in view of their applicability as anion‐selective ionophores in solvent polymeric membranes. None of these compounds induces significant changes in the anion‐selectivity pattern as compared with the membranes containing no organotin compound. Representatives with tributylstannyl groups, however, undergo chemical reactions leading to highly active anion ionophores of the type Bu 3 SnX, several of which ( e.g. Bu 3 SnCl and Bu 3 SnOH) may be present in equilibrium in the membrane phase depending on the measuring conditions.