A Zn-based coordination polymer as a highly selective multi-responsive luminescent sensor for Fe3+ cation and Cr2O72−/CrO42− anions

Abstract

A Zn-based coordination polymer [Zn(oba)2(bpy)2] (1) (where oba = 4,4′-oxybisbenzoic acid, bpy = 4,4′-bipyridine) has been synthesized under solvothermal condition and characterized by single-crystal X-ray diffraction. Thermal and water stability research revealed that it has good thermal and hydrolytic stability. Most stirringly, the luminescence investigation demonstrated that 1 can exploit as a highly selective and sensitive multi-responsive luminescence sensor for detecting Fe3+ cation and Cr2O72−/CrO42− anions in aqueous solutions through luminescence quenching effects, even in the presence of other interfering ions. In connection to these, the probable sensing mechanisms were also discussed.