Syntheses, structure and spectral studies of a new highly luminescent Cd(II)-5-sulfoisophtlialate coordination polymer

Abstract

A new coordination polymer, [Cd-2(mu(3)-sip)(2)(etim)(6)Cd(etim)(2)](n) (1) (sip = 5-sulfoisophtalate, etim = 2-ethylimidazole) has been synthesized and characterized by elemental analysis, spectral (FT-IR and photoluminescence) and thermal analysis. The structure of polynuclear complex 1 has been determined by the X-ray diffraction. Complexes 1 shows intense photoluminesent emission bands at 415 nm upon excitation at 319 nm. The emission of complex may be attributed to ligand centered luminescence emission. X-ray diffraction analysis of complex 1 reveals that it has a 1D polynuclear zig-zag chain. The 1D zig-zag chains in 1 are connected each other by N-H center dot center dot center dot O interaction and aromatic interaction between imidazole rings to form 3D supramolecular structure of 1.