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Lipophilic Amides of EDTA, NTA and Iminodiacetic Acid as Ionophores for Alkaline Earth Metal Cations

✍ Scribed by Daniel Erne; Nada Stojanac; Daniel Ammann; Ernö Pretsch; Wilhelm Simon

Publisher
John Wiley and Sons
Year
1980
Tongue
German
Weight
416 KB
Volume
63
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

A series of electrically neutral lipophilic di‐, tri‐, and tetra‐amides containing tertiary‐amine N‐atoms were prepared in order to investigate their selectivity for alkali and alkaline earth metal cations in solvent polymeric membranes. Considerable selectivity changes were observed for membranes incorporating certain of these ligands as compared with ligand‐free membranes. A 1:1 cation/ligand complex was isolated from N, N′, N″‐triheptyl‐N, N′, N″‐trimethyl‐nitrilotriacetamid and Mg (SCN)~2~ whereas with Ca (SCN)~2~ the corresponding 2:3 cation/ligand complex was formed. N, N′, N″, N‴, N‴‐tetramethyl‐ethylenediaminetetraacetamide yields a 1:1 cation/ligand complex with Mg (SCN)~2~.

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