Syntheses, Structures And Properties Of Self-assembly Based On Symmetrical And Asymmetrical Schiff-base Organic Ligands

The chemistry of organic-inorganic supramolecular coordination chemistry hasrecently become an active area of increasing interest in chemical industry.Self-assembly of organic ligands and inorganic metal ions is one of the most efficientapproaches for the construction of organic-inorganic composite materials. Thesecompounds performed in a variety of applications, such as adsorption, separation,catalysis and optical materials. Coordination-driven self-assembly of discretecoordination compounds has become one of the most important areas ofsupramolecular chemistry. In this thesis, a series of double Schiff-base ligands weresynthesized. The coordination chemistry based on these new ligands and metal ionswas investigated and several compounds were obtained. Their single crystal structureswere fully characterized by X-ray single-crystal diffraction.I. A M4L4metallamacrocycle was prepared from the combination reaction ofSchiff-base ligand containing1,2,4-triazole ring and Cu(OAc)2, and its visualdetection of silver(I) ions in water was investigated. This process was trackedby UV-Vis absorption spectrum, and the mechanism was studied. Also wesynthesized the mixed-metal “pseudo-porphyrin” supermolecule through thereaction of M4L4metallamacrocycle and Ag+.II. The coordination chemistry of Cu(II)-MOF was investigatedunderhydrothermal condition. The mechanism of reducing Cu(II) to Cu(I)wasinvestigated, and we got the evidence for water was oxidatd by Cu(II). Wedeveloped a novel isotopic method for O2detection based on a molecularferrocenyl-fulvene probe.III. A series of symmetric ligands containing2,1,3-benzothiadiazole groups weresynthesized. Several novel coordination compounds were obtained based onthem, and the single crystal structures of them were investigated.