Crystal structure, fluorescence properties and thermal stability of supramolecule complex [Eu(C10H9N2O4) (C10H8N2O4)(H2O)3]2 • phen • 4H2O

A new superamolecule complex (C10H10N2O4, H3L=2-oxo-propionic acid salicyloyl hydrazone and C12H8N2 = 1,10-phenanthroline phen) was synthesized and its crystal structure of [Eu(C10H9N2O4) center dot (C10H8N2O4) (H2O)(3)](2) center dot phen center dot 4H(2)O was determined by X-ray diffraction. The crystal belongs to he triclinic system, space group P (1) over bar with a=1. 378 6(12) nm, b=1. 398 8(12) nm, c=1.759 7(16) nm, alpha=73.977(11)degrees, beta=68.598(12)degrees, gamma=71.224(12)degrees, V=29.42(4) nm(3), Z=2, mu=2.208 mm(-1), D-c= 1.746 Mg/m(30), F(000) = 1 556, R = 0.037 7, omega R = 0.07414, GOF = 0.916. There are two 9-coordinated structure units in every molecule, in which Eu(II) is coordinated by two tridentate C10H10N2O4 ligands and three water molecules and both structural units are distorted monocapped square antiprism. There are one free 1, 10-phenanthrolines and four water molecules that are connected with 2-oxo-propionic acid salicyloyl hydrazone and water molecule by hydrogen bonds in the crystal cell. The complex formed a supermolecule in space through the hydrogen bonds. The composition of the complex is verified by IR, H-1 NMR and thermal decomposition. The test of luminescence capacity of the complex showed that the complex has a good fluorescence.