Lipophilic Diamides as Ionophores for Alkali and Alkaline Earth Metal Cations |
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Authors: | Daniel Erne Daniel Ammann Alex F Zhukov Felix Behm Ern Pretsch Wilthelm Simon |
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Institution: | Daniel Erne,Daniel Ammann,Alex F. Zhukov,Felix Behm,Ernö Pretsch,Wilthelm Simon |
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Abstract: | A series of lipophilic N, N, N′,N′-tetrasubstituted diamides were prepared and their selectivity in solvent polymeric membranes was studied, cis-N, N, N′, N′-Tetraisobutylcyclohexane-1,2-dicarboxamide induces a selectivity in membranes for Li+over alkaline earth metal cations and other alkali metal cations by a factor of about 1000 and 100 respectively. The ionophore N, N′-diheptyl-N,N′-dimethylethylmalonamide is an attractive candidate for the use in microelectrodes for the determination of intracellular Mg2+-activities. |
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