Tripodal ionophore with sulfate recognition properties for anion-selective electrodes

M. J. Berrocal, A. Cruz, I. H.A. Badr, L. G. Bachas

Research output: Contribution to journalArticlepeer-review

94 Scopus citations


Ionophore topology has a profound effect on the behavior of ion-selective electrodes. This is demonstrated with a new class of ionophores that incorporates aminochromenone moieties linked through urea spacers to different scaffolds that preorganize the ionophore binding cleft into tripodal topologies. Tris(2-aminoethylamine) and cis 1,3,5-tris(aminomethyl)cyclohexane were employed as the scaffolds. The two differ in their rigidity and in the size of ionophore cavity that they create. The electrodes based on the ionophore that incorporates the tris(2-aminoethylamine) scaffold show anti-Hofmeister behavior with an improved selectivity for sulfate. In contrast, the ionophore with the cis-1,3,5-tris(aminomethyl)cyclohexane scaffold exhibits a more Hofmeister-like response.

Original languageEnglish (US)
Pages (from-to)5295-5299
Number of pages5
JournalAnalytical Chemistry
Issue number21
StatePublished - Nov 1 2000
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry


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