Synthesis, crystal structure and fluorescence property of [Eu(C10H9N2O4)(C10H8N2O4)(H2O)3]•0.5bipy•3H2O

Eu(NO3)(3)center dot 4H(2)O has reacted with 2-oxopropionic acid salicyloyl hydrazone (C10H10N2O4) and 2,2'-bipyridyl (C10H8N2, bipy) to obtain a yellow prismatic crystal of the complex [Eu(C10H9N2O4)(C10H8N2O4)(H2O)(3)]center dot 0.5bipy center dot 3H(2)O for the first time in H2O-C2H5OH mixed solvent. The compound crystallized in the triclinic system with space group P-1 and parameters a=0.93392(16) nm, b=1.3100(2) nm, c=1.3895(2) nm, alpha=97.205(3)degrees, beta=105.411(2)degrees, gamma=106.364(2)degrees, V=15.35(2) nm(3), Z=2, mu=2.118 mm(-1), D-c=1.686 mg/m(3), F(000)=786, R=0.0116, wR=0.0507 and GOF=0.995. In the structure, europium atom is 9-coordinated by carboxyl O and acyl O atoms and azomethine N atom of two tridentate C10H10N2O4 ligands negative univalent and bivalent and three water molecules to form two stable five-membered rings sharing one side in ketone form. The coordination polyhedron around Eu3+ was described as a single cap square antiprism. In the crystal cell, there are one free bipy and three water molecules connected with 2-oxopropionic acid salicyloyl hydrazone and coordinated water molecule by hydrogen bonds. The complex formed a three-dimensional super molecule in space through hydrogen bonds. The test of luminescence performance of the complex has shown it has good fluorescence property.