Hydrothermal synthesis and crystal structure of a novel luminescent europium complex of 2,5-pyridinedicarboxylic acid

A novel europium complex, Eu(Hdinic)(dinic)(H₂O)₅·4H₂O (dinic = 2,5-pyridinedicarboxylic acid), has been synthesized under hydrothermal conditions and characterized structurally by X-ray diffraction methods. The complex has a mononuclear molecular structure, is monoclinic, space group C2/c, with a?=?13.877(5), b?=?9.632(3), c?=?32.991(11)?Å, β?=?93.414(4)°, V?=?4402(2)?ų, D _c?=?1.948?Mg?m^?3, Z?=?8, F(000)?=?2576, R ₁?=?0.0320. Its photophysical properties are reported.