A new chloride anionreceptor, derivatized oligoethylene oxide CF3SO2 substituted tetraamine (3), was synthesized. This compound exhibited strong Cl–1 ion binding properties in nonpolar solvents such as benzene. Neutral red and Nile blue chloride dye molecules do not dissolve in benzene. However, when compound (3) was added to a benzene solution containing the solid dye compounds, the color of the