Synthesis, crystal structure and thermal stability of a novel 3D coordination polymer Pb(1,4-napdc)(DMF)

A novel 3D metal-organic coordination polymer Pb(1,4-napdc)(DMF) (1,4-napdc=naphthalene-1,4-dicarboxylate) was synthesized at room temperature using slow vapor diffusion method to grow single crystal that has been analyzed by X-ray diffraction. The crystal belongs to orthorhombic with space group P2₁2₁2₁. The unit cell parameters are as fellows: a=0.701 3(2) nm, b=1.407 6(3) nm, c=1.521 5(4) nm, V=1.501 8(6) nm ³ and Z=4. In the crystal structure of Pb(1,4-napdc)(DMF), the square grids constructed with paddle-wheel units of Pb(II) and 1, 4-napdc links stack over each other to generate infinite 3D network, which has square apertures (1.158 × 1.158 nm²) along the crystallographic α-axis. The thermal stability of compound was investigated by differential scanning calorimetry and thermogravimetric analysis.