Syntheses, Structures, Thermal and Photoluminescence Properties of Two Zn(II) and Cd(II) Coordination Polymers Constructed from Taurine-derived Schiff Base and 4,4'-Bipyridine Ligands

Two chain-like coordination polymers, namely, {[Zn(saes)(4,4’-bipy)(H2O)]·H2O}n (1) and {[Cd (Hsaes)2(4,4’-bipy)(H2O)2]·2H2O}n (2), where H2saes = 2-(2-hydroxybenzylideneamino)ethanesulfonic acid and 4,4’-bipy = 4,4’-bipyridine, have been synthesized and characterized by singlecrystal X-ray diffraction, IR spectroscopy, elemental, thermogravimetric and photoluminescence analysis. X-Ray diffraction analyses indicate that 1 and 2 display octahedral metal centers with N3O3 and N2O4 donor sets, respectively. The Schiff base serves as a common N,O,O’-tridentate ligand in 1, and as a unique O-monodentate ligand in 2. In the crystal, both 1 and 2 form a 3D supramolecular architecture by O–H· · ·O, C–H· · ·O interactions or π· · ·π stacking. The thermal and solid-state photoluminescence properties of both complexes have been investigated.