Synthesis, Structure, and Property of Noncentrosymmetrical Coordination Polymer Based on Mixed Functional Ligands and Zinc Ions

This is the authors' abstract. We don't add key points for this paper.

One 3d-metal coordination polymer [Zn(Hspas)(Hpco)(H2O)]n (1) (NaH2spas = 5-sulfoisophthalic acid monosodium salt, Hpco = 2-pyridinecarbaldehyde oxime), was synthesized by solvent evaporation method under magnetci field. Each Zn atom is hexcoordinated with a distorted octahedral arrangement. Each Hspas2– anion acts as a tridentate ligand, which bridges with three Zn ions to form a two-dimensional layered structure. The two-dimensional structures are further linked by hydrogen bonds to generate a three-dimensional supramolecular structure. Complex 1 exhibits the photoluminescent emission with maximum at 396 nm, which arises from the ligand centered π–π*-transitions. The emission intensity of complex 1 is higher than that of NaH2spas ligand, which is indicative of the influence of the d10 closed shell electronic configuration of zinc ion on fluorescence property. In addition, complex 1 has the response of second-harmonic-generation (SHG) with 2 times that of KH2PO4.