Synthesis, Crystal Structure and Fluorescent Properties of a New One-Dimensional Polymer [Sm（ sal ） 4 （ phen）2 Na ] n

The title complex, [Sm(sal)4(phen)2Na]n (Ⅰ), where Hsal=salicylic acid, phen=1, 10-phenanthroline, was synthesized by the reaction of samarium chloride with phen and Hsal in ethanol solution and its crystal structure was determined by X-ray diffraction. The crystal is monoclinic, space group C2/c with cell dimensions of a=2.84989 (7) nm, b=0.93347 (2) nm, c=2.27954 (5) nm, β=132.4010 (8), V=4.4781 (2) nm3, Z=4, μ (Mo Kα)=13.97 cm-1, Dc=1.605 g*cm-3. The title complex is a compound, with centre of the Sm and Na atoms which are bridged by two carboxylate ligands. The structure of the complex demonstrates one-dimensional chain bridged by carboxyl groups. The fluorescence spectrum of the complex indicates that the second ligand phen shows enhancement effect on the fluorescence of the complex.