Design And Properties Of Pyridine Fluorescent Complexes

Two pyridine-based gels were designed and synthesized,one is a polymer gel based on 2,2'-bipyridyl-4,4'-dicarboxylic acid,the other type is a terpyridine-based complex small molecule gel and a polymer hydrogel.A mesoporous hybrid material based on europium ions that senses zinc ions was also designed and synthesized.The specific research contents are as follows:1)A polymer gel containing 2,2'-bipyridyl-4,4'-dicarboxylic acid,metal europium,metal terbium,water and organic solvent was designed and synthesized.The purpose of regulating the color of the gel can be achieved by adjusting the ratio of metal europium and terbium.The gel can be used for phase separation of water and organic solvents such as THF and alcohols.2)A new Eu composite functionalized mesoporous hybrid material Eu?TTA-MSN?₂L was designed and synthesized as a highly selective and sensitive fluorescent probe for the detection of Zn²⁺in aqueous solution.The material not only maintains the ordered structure of the mesoporous material,but also has good thermal stability and excellent luminescent properties.Furthermore,the resulting mesoporous hybrid material exhibits multicolor emission depending on the concentration of Zn²⁺ions in the water.3)A double-pyridinium structure containing terpyridine and diethylenetriamine was designed.The metal ion can induce it to become a small organic molecule gel in acetic acid and lactic acid.The gelling factor of the double terpyridine structure can be self-assembled into an organic small molecule gel by adding an appropriate amount of metal europium ions to the acrylic acid.After the self-assembly is completed,water and an initiator ammonium persulfate are added to polymerize to form a polymer hydrogel,and the gel has better viscoelasticity.In the presence of a alkali,a red fluorescent hydrogel can be obtained.The gel can also respond to stimuli such as tetrabutylammonium acetate,electrical,alkaline solvents and the like.