Hydrothermal Synthesis Of Metal Supramolecular Compounds Bridged Via Formate And 4,4'-bipy

In recent years, transition metal supramolecular chemistry has become one of the hottest topics in inorganic chemistry mainly due to their potential applications in electronic, photonic, magnetic and catalytic materials.This thesis reports the preparations of a series of supramolecular compounds through reactions of different transition metals with bridging ligands. Reactions of 4,4'-bipy with metal carboxylates produced six coordination compounds: [Zn(HCO2)2(4,4'-bipy)]∞ (1), [Zn(CH3CO2)2(4,4'-bipy)]∞ (2),[Ag(HCO2)(4,4'-bipy)] H2O HCO2H (3), {[Ni(HCO2)2(H2O)(4,4'-bipy)]4H2O}∞ (4), [Co(HCO2)2(4,4'-bipy)]∞ (5) and [Cd(HCO2)2(4,4'-bipy)]∞ (6). Reactions of pyridine or r-methylpyridine with CuBr afforded two novel polymers: {(PyH)3[Cu3Br6]}∞ (7) and {(r-MePyH)2[Cu2Br4]}∞ (8). Compounds 1~8 have been characterized by elemental analysis, IR spectra and X-ray crystallography. The molecular structures of 1, 4, 5 and 6 are three-dimensional (3D) frameworks, while compounds 2 and 3 show double chain structures. The structure of the anion of 7 shows that Br atom links two [Cu3Br5] fragments forming an intriguing 1D helical chain, while 8 has a linear chain structure.The successful synthesis of 1 provides us an intriguing reaction in which acetate is turned into formate under the hydrothermal synthesis conditions. More importantly, the synthesis and structural characterization of 1-8 not only extend our knowledge about a new family of supramolecular compounds, but also lay foundation for the study of their physical and chemical properties such as optical limiting performance, luminescence, etc..