Synthesis And Properties Of Thiazolyl Coordination Compounds

Coordination compounds have attracted a lot of interest from researchers because of their interesting topological structure and their wide application in molecular magnetics,photoluminescence,ion exchange,gas storage,and catalysis.As a branch of coordination compounds,metal-organic frameworks have become the focus of research in new materials because of their structure control,high crystallinity and controllable porosity.In this paper,[5,4-d]thiazole type organic ligand L1 was synthesized from thiazole,and three [3,2-b]pyrrole type organic ligands L2,L3 and L4 were synthesized with carboxylic acid as terminal group.These organic ligands were self-assembled by solvothermal and solution diffusion methods with transition metals to obtain 14 unreported coordination compounds.Their structures were characterized by X-ray single crystal diffraction,TGA,infrared,etc.,and the fluorescence properties were measured for some of the compounds.?.I.Pyridine-terminated [5,4-d] thiazole-type organic ligand L1 was synthesized and9 unreported coordination compounds with metal ions Cd(?),Zn(?),Co(?),Cu(?),Mn(?)were synthesized by solvothermal method and solution diffusion method.Their structures were characterized by X-ray powder diffraction,thermogravimetric analysis and infrared characterization.Fluorescence measurements show that the coordination compounds synthesized from ligands and metal ions Cd(?)and Zn(?)have strong fluorescence emission.?.Three [3,2-b]pyrrole type organic ligands L2,L3 and L4 were synthesized.These three ligands can be self-assembled with metal ion Zr(?)by solvothermal method to obtain three cases of Zr-MOF.Ligand L3 also obtained a one-dimensional chain structure by solvothermal self-assembly with metal ion Mn(?),and L2 and L1 obtained two-dimensional structure by self-assembly of metal ion Zn(?)by solvothermal method.According to the fluorescence test,Zr-MOF has a strong fluorescence emission.