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

Abstract

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.