Synthesis, crystal structure and fluorescence of a two-dimensional Cd(II) coordination polymer with thiocyanato and 4-methylpyridine N -oxide as bridging ligands

Abstract

A two-dimensional coordination complex [Cd(μ1,3-SCN)2(μ2-mpdo)] n (mpdo = 4-methylpyridine N-oxide) has been synthesized and structurally determined by X-ray crystallography. The complex crystallizes in the triclinic space group of Pī with a = 8.2589(14) Å, b = 8.5409(14) Å, c = 9.7947(16) Å, α = 70.022(2)°, β = 74.338(2)°, γ = 71.530(2)°. Each Cd(II) is coordinated by four μ1,3-SCN− forming a zigzag chain and then two μ2-mpdo monodentate ligands coordinate to two adjacent Cd(II) ions leading to a two-dimensional sheet structure along the ab plane, and in the c direction the sheets stack parallel through π–π interactions and giving a three-dimensional structure. The complex exhibits a strong fluorescent emission spectrum in the solid state.