Synthesis, crystal structure and luminescent property of a europium nitrate ternary complex with a diphenol macrocyclic ligand

A new ternary complex of europium nitrate [Eu(H(2)L)(NO(3))(3)] (L denotes the macrocyclic ligand) with a diphenol macrocyclic ligand has been synthesized by [2+2] condensation of 1,3-propyldiamine with 2,6-diformyl-4-methylphenol in the presence of europium nitrate, and systematically characterized by physical methods. The study of X-ray analysis shows that the complex is neutral molecule and composed of a enropium ion, a nertral macrocyclic ligand and three coordinated nitrates. The crystal crystallizes in the monoclinic system, space group P2(1)/c with a= 1.57296(11) nm, b=0.96957 (7) nm, c=1.91196(13) nm, beta = 104.445(1)degrees, V = 2.8237(3) nm(3), Z = 4, R=0.0507, and wR=0.1168. The central ion Eu(3+) is ten-coordinated in the coordination geometry of a distorted bicapped square-antiprism. At 77 K, excitation of the title complex in methanol solution give rise to the characteristic emissions of the Eu(3+) ion.