Studies On Quinoline Derivatives As Ion Probes And The Metal Schiff Base Complexes

The related studies about the luminous quinoline derivatives and their utilization as ion probes for examining Hg2+, as well as Schiff base/metal complexes were briefly generalized. In this thesis,53representative ligands were chosen to focus on studying ion sensing function of quinoline derivatives and the structure and property of metal ion complexes of Schiff bases. The recognition of Hg2+using L1, L19and L26as ion probe was also investigated.(?)The26quinoline derivatives-based ligands were designed and synthesized. Their fluorescence selectivity towards metal ions was examined. The series of ligands possibly combined metal ions by means of oxygen atoms (or phenoxo) in sidearm carbonyl group and nitrogen atoms of pyridine, whereas the combining fashion was probably different when the same metal ions coordinated with different aldehyedes or ligands with different ending groups, which suggests that the ligand structure has a remarkable effect on the complex fashion. It is shown that the ligands L1and L19have exhibited a strong fluorescence absorbance in visible light area. L1and L19coordinate with Hg2+well that makes it possible to be used to recognize Hg2+. More importantly, the recognition can be realized by naked eyes.(?)The Hg2+coordination complex based on L26exhibited characteristic ultraviolet-visible light absorption peak in the visible light region, reaching an excellent naked-eye recognization.(?)On the basis of the skeleton of amine derivatives and salicylic aldehyde derivatives,25novel flexible Schiff bases ligands were selected. When fixed the coordination numbers, various complexes with different size and structure were made by changing the length of the flexible spacers. The resulted complex configuration with metal ions was dependent on the flexibility of the spacers, the ending groups, and different aromatic aldehydes. The kinds of metal ions and anion species could also affect the resulted complex structure. We synthesized the corresponding coordination complexes based on Schiff base ligands and investigated their structure, properties and biological activity.(?)A series of triple helical complexes based on L45and rare earth metals were prepared, which have the unique properties of absorbing and fixing CO2gas.