The Synthesis And Fluorescent Properties Of Novel Carboxylate Complexes With N Donor

Carboxylic acid coordination polymers as building a class of common ligands, which are in various ways with the bonding of metal ions, can self-assemble into multi-core secondary structure elements and construct a variety of structures of coordination polymers. The ligands with carboxyl groups and nitrogen heterocyclic rings, have a certain structural rigidity and stability, and can coordinate to the metal ions by all kinds of mode. They could be used in the synthesis of properties of various groove junction complexes.In this paper, acridone as raw material, through a series of reactions, synthesis of three kinds of nitrogen-containing carboxylic acid compounds, and their structures were characterized by 1H NMR IR, and MS, the results showed that their structures were accord with the target compounds.By using the synthesis of L2 as model reaction, we have got optimal reaction conditions: the ratio of the raw material is 1:1.2, the reaction temperature is 110℃, the reaction time is 24h, and the catalyst is KOH. In this conditions, the yield of target product was up to 65.16%.In this dissertation, fifteen new coordination complexes have been synthesized by the solution method, and their structures were characterized by 1H NMR and IR, the results showed that their structures were accord with the target compounds. The fluorescence properties of the complexes were measured by using UV and fluorescence spectroscopy. Compared with the complexes and the Ligands, we could see that the UV and fluorescence spectroscopy have some slight changes, and the location of the fluorescence emission spectra is slightly red-shifted. The introduction of metal ions to some extent changed the fluorescence intensity of the complexes, in which Zn ions one enhanced the largest increase. The introduction of metal ions did not significantly change the emission spectrum of the peak position, therefore, we can speculat that the fluorescence emission of the complexes are from the ligand internalπ*→πtransition.