[Luminescence enhancement of phthalate-Eu-Sr complex]

Using doped method low rare earth concentration and chelates matrix luminescence was successful in the chelates systems. The luminescence of phthalate-Eu-Sr complex is an example. The experimental results show that the complex luminescence would be enhanced co-doped other metal ions(shch as Mn), because other metal ions can transfer energy to rare earth ion. Addition of the second ligand will enhance the complex luminescence, too. In the FTIR spectra of co-doped complexes, the vibrations of nu a(COO-), nu as(COO-), nu CC have shifted, which show that the co-doped metal ions have influence on the molecular structure.