Research has shown that ion selective electrodes (ISEs) with non-Hofmeister selectivity patterns can be created using lanthanide metalloporphyrins as ionophores in polymeric membranes. It has been determined that erbium(III) and lutetium(III) tetraphenylporphryin-based electrodes show enhanced selectivity toward carboxylate-containing anions such as benzoate and salicylate. The selectivity coefficients of these ISEs are determined by comparing the EMF responses of the primary anion versus common interfering anions. Due to the success found with previous erbium(III) and lutetium(III) metalloporphyrins as ionophores in ISEs, research has been extended into the previously unexamined dysprosium(III) and thulium(III) tetraphenylporphyrins. This poster will present data that shows the effects of cationic and anionic additives on polymer membranes made from these ionophores as well as a preliminary examination of a wide variety of anions to determine their selectivity patterns and affinity for these membranes.

Anion selective polymeric membrane electrodes based on lanthanide metalloporphyrins

247th National Meeting (2014)

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