catena-Poly[[[diaqua­[3-(pyridin-4-yl)benzoato-[kappa]²O,O']terbium(III)]-bis­[[mu]-3-(pyridin-4-yl)benzoato-[kappa]²O:O']] monohydrate]

In the title compound, {[Tb(C₁₂H₈NO₂)₃(H₂O)₂]·H₂O}_n, the Tb^III cation is in an eight-coordinate environment, ligated by six carboxyl­ate O atoms from five 3-(pyridin-4-yl)benzoate (L) ligands and by two O atoms from water mol­ecules. The cations are bridged by the carboxyl­ate O atoms of the L ligands to form a two-stranded polymeric chain which is assembled into a three-dimensional supra­molecular network through regular inter­chain O-H...N hydrogen bonding. On excitation at 320 nm, the title compound displays a series of emissions, which were assigned to the characteristic electronic transitions of Tb^III.