A squaraine-based sodium selective fluorescent chemosensor

Article abstract of DOI:10.1016/S0040-4039(98)01165-4

A novel squaraine with a lariat-crown ether cation-receptor unit was synthesized and shown to selectively respond to Na⁺ ions in polar protic solvents. The selectivity of the novel ligand, together with the impressive spectroscopic properties of squaraines yields a promising chemosensor.