Synthesis and luminescence properties of nanoparticles embedded with Europium (III)/coumarin complexes

摘要

A complex of europium (III)/coumarin was synthesized and the complexation reaction was studied by UV-vis, fluorescence, FTIR, ~1H NMR spectroscopy, DTA and TG analyses. To improve the stability and solubility, and amplify the optical signal of the complex in aqueous solution, the complex was encapsulated inside into silica nanoparticles through a sol-gel process. The final product could be taken up by cells and showed obviously blue fluorescence by excitation. The study indicated that nanoparticles embedded with europium (III)/coumarin complexes could be applied as luminescent nanoprobes in cell imaging of biological systems.