Synthesis, Crystal Structure, Luminescence and Thermal Stability of a New Coordination Polymer Constructed by Europium(III) and 2,4-Dichlorophenoxyacetate

A new coordination polymer {[Eu-2(Cl2C6H3OCH2COO)(6)(H2O)(4)]center dot(DMF)(4)center dot(H2O)(2)}(n) with 2,4-dichlorophenoxy acetic acid as the ligand has been synthesized. The crystal data for this complex are as follows: monoclinic, space group P2(1)/n, a=0.86474(17) nm, b=3.2475(7) nm, c=1.3843(3) nm, beta=92.81(3)degrees, V=-3.8827(13) nm(3), D-c=1.718 g/cm(3), Z=2, mu(Mo K alpha)=2.093 mm(-1), F(000)=2008, final discrepancy factors R-1=0.0454, wR(2)=0.1165. The crystal structure shows that the title complex forms one-dimensional chain structure by bridging 2,4-dichlorophenoxy acetic acid anions. Every centric europium(III) ion is coordinated with ten oxygen atoms from five 2,4-dichlorophenoxy acetic acid anions and two water molecules, giving a ten-coordinated distorted bicapped square antiprism geometry. The luminescent property and thermal stability of the complex are also studied.