Li+ selective podand-type fluoroionophore based on a diphenyl sulfoxide derivative bearing two pyrene groups

Abstract

New podand-type fluoroionophores having two pyrene moieties: 2,2′-bis(1-pyrenylacetyloxy)diphenyl sulfide (3), 2,2́-bis(1- pyrenylacetyloxy)diphenyl sulfoxide (4), and 2,2́-bis(1-pyrenylacetyloxy) diphenyl sulfone (5), have been synthesized by connecting two 1-pyrenecarbonylmethyl groups with the two hydroxy groups of 2,2́-dihydroxydiphenyl sulfide, sulfoxide, and sulfone, respectively. Their complexation behavior toward alkali metal ions was examined by fluorescence spectroscopy. Among these fluoroionophores, compound 4, having a sulfinyl group, showed high selectivity toward Li+.