One-dimensional Coordination Polymers Generated from Organosulfur Ligand: Synthesis, Structure, Fluorescence and Magnetic Properties

Two new one-dimensional (1D) coordination polymers [M (2-mercapto-5-methyl-1,3,4-thiadiazole)(2)](n) [M = Zn (1), Co(2)], were synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction, FTIR, elemental analysis, and thermogravimetric analysis. Both two compounds crystallize in the monoclinic space group C2/c with analogous structures, in which the metal center exhibit distorted tetrahedral coordination geometries. The deprotonated 2-mereapto-5-methyl-1,3,4-thiadiazole molecule as a mu(2)-ligand linkers the metal center into a 1D chain, which are futher linked by weak C-H center dot center dot center dot S bonds into a three-dimensional supramolecular framework. At room temperature, both two compounds exhibit intense photoluminescence. On the basis of the results of TG-DTA analyses, the structure is thermally stable up to 210 degrees C for compound 1 and 260 degrees C for compound 2. The magnetic behavior of compound 2 was studied.