Preparation And Properties Of Rare Earth Europium Fluorescent Materials Based On Tripyridine Ligands

In this paper,we have designed two kinds of rare earth complexes hybrid materials based on tripyridine ligands.The first kind is mesoporous hybrid materials based on europium ions,which can sense copper ions.The other is based on the gel state of polyethyleneimine modified L-COOH-PEI-Eu(NTA)₃(H₂O)₂.The specific research contents are as follows.1)A novel fluorescence sensor Eu(NTA)₃L-COOH-PMO was designed and synthesized,The sensor combines the advantages of rare earth complex and mesoporous matrix.It has not only excellent fluorescence properties of rare earth europium complex,but also good photothermal stability of mesoporous matrix,which effectively makes up for the poor stability of pure rare earth complex.2)A tripolypyridine polyethylenimine rare earth complex hydrogel was synthesized.Through the condensation method,polypyridine derivatives were modified by tripyridine derivatives.After introducing rare-earth ions,the hydrogen bonds were self assembled through the heating of a specific temperature(130 degrees),and changed from the original PEI fluid state to the gel.The experimental data show that the tripyridine polyethyleneimine complex hydrogel has higher adsorption capacity for acetone.After 72h adsorption,the adsorption saturation is achieved,and the adsorption acetone is about 2.5 times the mass of the gel.The gelation of modified aminated gel with rare earth complexes is more efficient than that of polyethyleneimine in the adsorption of acetone.