Displacement method to develop highly sensitive and selective dual chemosensor towards sulfide anion

By utilizing a displacement method, a macrocyclic compound 1, could report the presence of sulfide anion, with the detection limit of 7.0 × 10−7 mol/L; moreover, no interference was observed from other anions, including SO32−, HSO3−, SO42−, ClO4−, I−, Br−, Cl−, F−, IO3−, HPO42−, PO43−, C2O42−, S2O32−, CO32−, AcO−, CN− and P2O74−, making compound 1 a new, highly sensitive and selective sulfide anion chemosensor.