Synthesis, XPS and fluorescence properties of Eu3+ complex with polydimethylsiloxane

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 5D2 RT 7F0 transition of Eu(III) ion, was enhanced. Therefore, there is an efficient intermolecular energy transferred from the polymer to the rare earth ions. Meanwhile, the fluorescence intensity change of Eu(III)-PDMS displays typical concentration quenching mechanism.