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Salicylate-selective Electrode Based on a Biomimetic Guanidinium Ionophore

Salicylate-selective Electrode Based on a Biomimetic Guanidinium Ionophore

R S Hutchins, P Bansal, P Molina, M Alajarín, A Vidal, L G Bachas

Anal Chem. 1997 Apr 1;69(7):1273-8.

PMID: 21639336

Abstract:

A biomimetic strategy was employed in the development of oxoanion-selective ionophores containing the guanidinium functional group. These ionophores mimic the selective interaction observed between arginine residues of proteins and oxoanions. In previous work, it was demonstrated that a structurally rigid guanidinium ionophore exhibited excellent hydrogen sulfite selectivity (Anal. Chem. 1994, 66, 3188-3192). Herein, we describe guanidinium-containing ionophores that are selective for the oxoanion salicylate. The ability to rationally design anion-selective electrodes through this biomimetic strategy, and to both alter selectivity and improve response characteristics through structural changes to the ionophore, has been demonstrated. (1)H-NMR complexation and modeling studies were used to examine and correlate the selectivity observed with the structure of the guanidinium compounds.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP151029297	Hydrogen sulfite ionophore I		151029-29-7	Price

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