A thioether-containing luminescent metal-organic framework for highly selective and sensitive detection of Ag(I) ion

Abstract A stable three-dimensional coordination polymer, [Eu 2 (pbbp)(pbsd) 3 ] ( 1 ) (H 2 pbsd = 2,2′-((1,4-phenylenebis(methylene))bis(sulfanediyl))dinicotinic acid, H 2 pbbp·2Cl = 1,1′-(1,4-phenylene-bis(methylene))-bis(3-carboxy pyridinium) dichloride), was prepared by the solvothermal reaction of Eu(NO 3 ) 3 ·6H 2 O, H 2 pbbp·2Cl and H2pbsd in mixed solvent of DMF and H 2 O, which was characterized by single-crystal X-ray diffraction, powder X-ray diffraction, infrared spectroscopy, and thermogravimetric analyses. 1 exhibits a 3D 6-connected sqcl network decorated by uncoordinated Lewis basic thioether groups. In particular, 1 shows excellent application as luminescent sensor for sensing Ag + ions in ethylene glycol solution with high sensitivity and selectivity based on luminescence quenching effect.