Synthesis and crystal structure of heteronuclear La(III)-Cu(II) complex {[LaCu2(NTA)2(4,4′-bpy)(H2O)3]NO3•5H2O}n

A novel La(III)-Cu( II) heterometallic coordination polymer {[LaCu2( NTA)(2)(4, 4'-bpy) (H2O)(3)] NO3 . 5H(2)O}(n), where H(3)NTA denotes nitrilotriacetic add and 4, B-bpy denotes 4, 4'-bipyridine, was synthesized and characterized by IR spectrum, elemental analysis and X-ray diffraction. The complex n;crystallizes in the triclinic space group P (1) over bar with cell parameters a = 1.33710(10) nm, b = 1.44530(10) mn, c = 1.0949(2) nn, alpha = 71.905(7)degrees beta = 74.327(7)degrees, gamma = 64.427(9)degrees, V = 1.7912(4) mm(3) and Z = 2. It consists of heterometallic units, in which each La(III) ion is coordinated in a distorted monocapped square antiprism by three oxygen atoms from water molecules and six carboxyl oxygen atoms from five NTA(3-) ions, and each Cu (II) ion is coordinated by one nitrogen atom from 4, Q-bpy and one nitrogen atom, three oxygen atoms from NTA(3-). In the tide complex, La(III) ions and Cu (II) ions are connected by the heterometallic bridging of NTA(3-), constructing a two-dimensional network structure along the [110]. And it Is extended into an finite three-dimensional network. structure by the formation of homometallic bridging of Cu-4, 4'-bpy-Cu, exhibiting a certain inclusion ability.