Synthesis, XPS and fluorescence properties of Eu~(3+) complex with polydimethylsiloxane

摘要

Eu(III)-containing polymer complex was synthesized, in which polydimethylsiloxane was used as a polymer ligand. The complex was characterized by ultraviolet-visual, infrared, X-ray photoelectron and fluorescence spectroscopy. The results exhibit that the metal Eu(III) ion is directly bonded to oxygen atoms in polymer chain of PDMS and formed the complex of Eu(III)-containing polymer. On the other hand, the blue light at 455 nm in the complex under UV excitation at room temperature, in which the emission peak is assigned to the ~5D_2 -> ~7F_0 transition of Eu(III) ion, was enhanced. Therefore, there is an efficient intermolecular energy transferred from the polymer to the rare earth tons. Meanwhile, the fluorescence intensity change of Eu(III)-PDMS displays typical concentration quenching mechanism.