Poly[[diaqua-(1,10-phenanthroline-κN,N')(μ(3)-4-sulfonato-benzene-1,2-dicarboxyl-ato-κO:O,O:O)dysprosium(III)] dihydrate].

The 4-sulfophthalate trianion in the polymeric title complex, {[Dy(C(8)H(3)O(7)S)(C(12)H(8)N(2))(H(2)O)(2)]·2H(2)O}(n), bridges three water/phenanthroline-coordinated Dy(III) atoms to form a three-dimensional network architecture. The metal atom is further chelated by a carboxyl-ate group and is covalently bonded to a monodentate carboxyl-ate group and to a monodentate sulfonate group in a distorted square-anti-prismatic geometry. The coordinating and the solvent water mol-ecules are hydrogen bonded to the network. In the crystal, one solvent water mol-ecule is disordered over two positions [major component = 59 (3)%].